Merge pull request 'ccm-admin' (#7) from ccm-admin into master

Reviewed-on: #7

Former-commit-id: ebbf951981

.gitignore

@@ -11,3 +11,4 @@ target
 .settings
 .tscache
 *.vscode
+/ccm-core/nbproject/

ccm-bundle-devel-wildfly/faces-config.NavData

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scene Scope="Project" version="2">
+    <Scope Scope="Faces Configuration Only"/>
+    <Scope Scope="Project"/>
+    <Scope Scope="All Faces Configurations"/>
+</Scene>

ccm-bundle-devel-wildfly/pom.xml

@@ -213,7 +213,15 @@
                             <artifactId>ccm-core</artifactId>
                             <type>jar</type>
                             <includes>
-                                <include>views/</include>
+                                <include>WEB-INF/</include>
+                            </includes>
+                        </overlay>
+                        <overlay>
+                            <groupId>org.libreccm</groupId>
+                            <artifactId>ccm-shortcuts</artifactId>
+                            <type>jar</type>
+                            <includes>
+                                <include>WEB-INF/</include>
                             </includes>
                         </overlay>
                         <overlay>
@@ -224,6 +232,14 @@
                                 <include>resources/</include>
                             </includes>
                         </overlay>
+                        <overlay>
+                            <groupId>org.librecms</groupId>
+                            <artifactId>ccm-cms</artifactId>
+                            <type>jar</type>
+                            <includes>
+                                <include>WEB-INF/</include>
+                            </includes>
+                        </overlay>
                         <overlay>
                             <groupId>org.librecms</groupId>
                             <artifactId>ccm-cms</artifactId>

ccm-bundle-devel-wildfly/src/main/resources/log4j2.xml

@@ -101,5 +101,11 @@
         <Logger name="com.arsdigita.web.DefaultApplicationFileResolver"
                 level="debug">
         </Logger>
+        <Logger name = "org.libreccm.ui.admin.AdminApplication"
+                level="debug">
+        </Logger>
+        <Logger name="org.libreccm.ui.admin.applications.ApplicationsPage"
+                level="debug">
+        </Logger>
     </Loggers>
 </Configuration>

ccm-bundle-devel-wildfly/src/main/webapp/WEB-INF/jboss-web.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" ?>
 <jboss-web>
     <context-root>/libreccm</context-root>
+    <default-encoding>UTF-8</default-encoding>
 </jboss-web>

ccm-bundle-devel-wildfly/src/main/webapp/WEB-INF/web.xml

@@ -15,6 +15,10 @@
         <param-name>ccm.distribution</param-name>
         <param-value>libreccm</param-value>
     </context-param>
+    <context-param>
+        <param-name>resteasy.resources</param-name>
+        <param-value>org.jboss.resteasy.plugins.stats.RegistryStatsResource</param-value>
+    </context-param>
 
     <!-- No JSESSIONID!!! -->
     <session-config>
@@ -65,8 +69,12 @@
         <param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
         <param-value>true</param-value>
     </context-param>
+    <context-param>
+        <param-name>PARAMETER_ENCODING</param-name>
+        <param-value>UTF-8</param-value>
+    </context-param>
     
-<!--    <servlet>
+    <!--    <servlet>
         <servlet-name>vaadin-servlet</servlet-name>
         <servlet-class>com.vaadin.cdi.server.VaadinCDIServlet</servlet-class>
     </servlet>

ccm-cms/pom.xml

@@ -71,6 +71,22 @@
             <scope>provided</scope>
         </dependency>
         
+        <dependency>
+            <groupId>javax.mvc</groupId>
+            <artifactId>javax.mvc-api</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.krazo</groupId>
+            <artifactId>krazo-core</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.krazo.ext</groupId>
+            <artifactId>krazo-freemarker</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        
         <dependency>
             <groupId>com.fasterxml.jackson.jaxrs</groupId>
             <artifactId>jackson-jaxrs-json-provider</artifactId>

ccm-cms/src/main/java/org/arsdigita/cms/CMSConfig.java

@@ -39,49 +39,71 @@ import java.util.List;
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-@Configuration
+@Configuration(
+    descBundle = "com.arsdigita.cms.CMSConfig",
+    descKey = "description",
+    titleKey = "title"
+)
 public class CMSConfig {
 
     /**
      * Path for the default item template. Path is relative to the Template Root
      * path.
      */
-    @Setting
+    @Setting(
+        descKey = "defaultItemTemplatePath.desc",
+        labelKey = "defaultItemTemplatePath.label"
+    )
     private String defaultItemTemplatePath = "/default/item.jsp";
 
     /**
      * Path for the default folder template. Path is relative to the Template
      * Root path.
      */
-    @Setting
+    @Setting(
+        descKey = "defaultFolderTemplatePath.desc",
+        labelKey = "defaultFolderTemplatePath.label"
+    )
     private String defaultFolderTemplatePath = "/default/folder.jsp";
 
     /**
      * Path or the root folder for template folders. Path is relative to webapp
      * root. Modify with care! Usually modified by developers only!
      */
-    @Setting
+    @Setting(
+        descKey = "templateRootPath.desc",
+        labelKey = "templateRootPath.label"
+    )
     private String templateRootPath = "/templates/ccm-cms/content-section/";
 
     /**
      * Item Adapters File, path to an XML resource containing adapter
      * specifications. Path is relative to webapp root.
      */
-    @Setting
+    @Setting(
+        descKey = "itemAdapters.desc",
+        labelKey = "itemAdapters.label"
+    )
     private String itemAdapters = "/WEB-INF/resources/cms-item-adapters.xml";
 
     /**
      * Use streamlined content creation: upon item creation, automatically open
      * authoring steps and forward to the next step
      */
-    @Setting
+    @Setting(
+        descKey = "useStreamlinedCreation.desc",
+        labelKey = "useStreamlinedCreation.label"
+    )
     private boolean useStreamlinedCreation = true;
 
     /**
      * DHTML Editor Configuration for use in CMS module, lists the configuration
      * object name and Javascript source location for its definition.
      */
-    @Setting
+    @Setting(
+        descKey = "dhtmlEditorConfig.desc",
+        labelKey = "dhtmlEditorConfig.label"
+    )
     private List<String> dhtmlEditorConfig = Arrays.asList(new String[]{
         "TinyMCE.Config", "scripts/ccm-cms/tinymce-loader.js"
     });
@@ -91,9 +113,12 @@ public class CMSConfig {
      * Defines which plugins to use, e.g.TableOperations,CSS Format:
      * [string,string,string]
      */
-    @Setting
+    @Setting(
+        descKey = "dhtmlEditorPlugins.desc",
+        labelKey = "dhtmlEditorPlugins.label"
+    )
     private List<String> dhtmlEditorPlugins = Arrays.asList(new String[]{
-//        "scripts/ccm-cms/tinymce/plugins/insertimage.js"
+        //        "scripts/ccm-cms/tinymce/plugins/insertimage.js"
         "http://localhost/web/ccm-cms-tinymce/insertimage.js"
     });
 
@@ -101,64 +126,94 @@ public class CMSConfig {
      * Prevent undesirable functions from being made available, eg images should
      * only be added through the cms methods.
      */
-    @Setting
+    @Setting(
+        descKey = "dhtmlEditorHiddenButtons.desc",
+        labelKey = "dhtmlEditorHiddenButtons.label"
+    )
     private List<String> dhtmlEditorHiddenButtons = Collections.emptyList();
 
     /**
      * Hide section admin tabs from users without administrative rights.
      */
-    @Setting
+    @Setting(
+        descKey = "hideAdminTabs.desc",
+        labelKey = "hideAdminTabs.label"
+    )
     private boolean hideAdminTabs = true;
 
     /**
      * Hide Folder Index Checkbox from folder view
      */
-    @Setting
+    @Setting(
+        descKey = "hideFolderIndexCheckbox.desc",
+        labelKey = "hideFolderIndexCheckbox.label"
+    )
     private boolean hideFolderIndexCheckbox = true;
 
     /**
      * Hide launch date parameter on all forms and displays where it's used.
      */
-    @Setting
+    @Setting(
+        descKey = "hideLaunchDate.desc",
+        labelKey = "hideLaunchDate.label"
+    )
     private boolean hideLaunchDate = true;
 
     /**
      * Require the launch date parameter to be set by the content author.
      */
-    @Setting
+    @Setting(
+        descKey = "requireLaunchDate.desc",
+        labelKey = "requireLaunchDate.label"
+    )
     private boolean requireLaunchDate = true;
 
     /**
      * Hide the templates tab on the item admin page.
      */
-    @Setting
+    @Setting(
+        descKey = "hideTemplatesTab.desc",
+        labelKey = "hideTemplatesTab.label"
+    )
     private boolean hideTemplatesTab = false;
 
     /**
      * Hide the upload file link in the editing of a text asset.
      */
-    @Setting
+    @Setting(
+        descKey = "hideTextAssetUploadFile.desc",
+        labelKey = "hideTextAssetUploadFile.label"
+    )
     private boolean hideTextAssetUploadFile = false;
 
     /**
      * Hide timezone labels (if, for example, all users will be in the same
      * timezone and such information would be unnecessary)
      */
-    @Setting
+    @Setting(
+        descKey = "hideTimezone.desc",
+        labelKey = "hideTimezone.label"
+    )
     private boolean hideTimezone = false;
 
     /**
      * Whether the Wysiwyg editor should clear the text of MSWord tags,
      * everytime the user clicks on 'Save'
      */
-    @Setting
+    @Setting(
+        descKey = "saveTextCleansWordTags.desc",
+        labelKey = "saveTextCleansWordTags.label"
+    )
     private boolean saveTextCleansWordTags = true;
 
     /**
      * Get the search indexing not to process FileAssets, eg to avoid PDF
      * slowdowns
      */
-    @Setting
+    @Setting(
+        descKey = "disableFileAssetExtraction.desc",
+        labelKey = "disableFileAssetExtraction.label"
+    )
     private boolean disableFileAssetExtraction = false;
 
     /**
@@ -172,55 +227,79 @@ public class CMSConfig {
      * link to restart a workflow will not work.
      *
      */
-    @Setting
+    @Setting(
+        descKey = "deleteWorkflowAfterPublication.desc",
+        labelKey = "deleteWorkflowAfterPublication.label"
+    )
     private boolean deleteWorkflowAfterPublication = false;
 
     /**
      * Defines the number of days ahead that are covered in the 'Soon Expired'
      * tab
      */
-    @Setting
+    @Setting(
+        descKey = "soonExpiredTimespanDays.desc",
+        labelKey = "soonExpiredTimespanDays.label"
+    )
     private int soonExpiredTimespanDays = 14;
 
     /**
      * Defines the number of months ahead that are covered in the 'Soon Expired'
      * tab
      */
-    @Setting
+    @Setting(
+        descKey = "soonExpiredTimespanMonths.desc",
+        labelKey = "soonExpiredTimespanMonths.label"
+    )
     private int soonExpiredTimespanMonths = 1;
 
     /**
      * Does a redirect to the unpublished item generate not found error?
      */
-    @Setting
+    @Setting(
+        descKey = "unpublishedNotFound.desc",
+        labelKey = "unpublishedNotFound.label"
+    )
     private boolean unpublishedNotFound = true;
 
     /**
      * Links created through browse interfaces should only be within the same
      * subsite
      */
-    @Setting
+    @Setting(
+        descKey = "linksOnlyInSameSubsite.desc",
+        labelKey = "linksOnlyInSameSubsite.label"
+    )
     private boolean linksOnlyInSameSubsite = false;
 
     /**
      * Link available to reset lifecycle on republish. If false don't display
      * the link otherwise display.
      */
-    @Setting
+    @Setting(
+        descKey = "hideResetLifecycleLink.desc",
+        labelKey = "hideResetLifecycleLink.label"
+    )
     private boolean hideResetLifecycleLink = true;
 
     /**
      * Whether to include INPATH operators to contains clause in intermedia
      * search
      */
-    @Setting
+    @Setting(
+        descKey = "scoreTitleAndKeywords.desc",
+        labelKey = "scoreTitleAndKeywords.label"
+    )
     private boolean scoreTitleAndKeywords = false;
 
     /**
      * Title Weight, the relative weight given to title element within cms:item
      * when ranking search results (only used by interMedia)
      */
-    @Setting
+    @Setting(
+        descKey = "titleWeight.desc",
+        labelKey = "titleWeight.label"
+    )
     private int titleWeight = 1;
 
     /**
@@ -228,13 +307,19 @@ public class CMSConfig {
      * within dublinCore element within cms:item element when ranking search
      * results (only used by interMedia)
      */
-    @Setting
+    @Setting(
+        descKey = "keywordWeight.desc",
+        labelKey = "keywordWeight.label"
+    )
     private int keywordWeight = 1;
 
     /**
      * Limit the item search to current content section
      */
-    @Setting
+    @Setting(
+        descKey = "limitItemSearchToContentSection.desc",
+        labelKey = "limitItemSearchToContentSection.label"
+    )
     private boolean limitItemSearchToContentSection = true;
 
     /**
@@ -245,60 +330,87 @@ public class CMSConfig {
      * Second string is the name of the bebop step component eg
      * com.arsdigita.cms.contenttypes.ui.ImageStep
      */
-    @Setting
+    @Setting(
+        descKey = "skipAssetSteps.desc",
+        labelKey = "skipAssetSteps.label"
+    )
     private List<String> skipAssetSteps = Collections.emptyList();
 
     /**
      * Mandatory Descriptions Content types may refer to this to decide whether
      * to validate against empty descriptions
      */
-    @Setting
+    @Setting(
+        descKey = "mandatoryDescriptions.desc",
+        labelKey = "mandatoryDescriptions.label"
+    )
     private boolean mandatoryDescriptions = false;
 
     /**
      * Delete Finished Lifecycles. Decide whether lifecycles and their phases
      * should be deleted from the system when finished.
      */
-    @Setting
+    @Setting(
+        descKey = "deleteLifecycleWhenComplete.desc",
+        labelKey = "deleteLifecycleWhenComplete.label"
+    )
     private boolean deleteLifecycleWhenComplete = false;
 
     /**
      * Delete Sent Workflow Notifications. Decide whether successfully sent
      * notifications and messages should be deleted from the system
      */
-    @Setting
+    @Setting(
+        descKey = "deleteWorkflowNotificationWhenSend.desc",
+        labelKey = "deleteWorkflowNotificationWhenSend.label"
+    )
     private boolean deleteWorkflowNotificationWhenSend = false;
 
     /**
      * Decide whether successfully sent notifications and messages should be
      * deleted from the system
      */
-    @Setting
+    @Setting(
+        descKey = "deleteExpiryNotificationsWhenSent.desc",
+        labelKey = "deleteExpiryNotificationsWhenSent.label"
+    )
     private boolean deleteExpiryNotificationsWhenSent = false;
 
     /**
      * Amount of time (in hours) before the expiration of a content item that
      * users in the Alert Recipient role are alerted via email
      */
-    @Setting
+    @Setting(
+        descKey = "defaultNotificationTime.desc",
+        labelKey = "defaultNotificationTime.label"
+    )
     private int defaultNotificationTime = 0;
 
     /**
      * Whether a content item's author should be notified by the item's
      * LifecycleListener; defaults to true
      */
-    @Setting
+    @Setting(
+        descKey = "notifyAuthorOnLifecycle.desc",
+        labelKey = "notifyAuthorOnLifecycle.label"
+    )
     private boolean notifyAuthorOnLifecycle = false;
 
     /**
      * XML Mapping of the content center tabs to URLs, see
      * {@link ContentCenterDispatcher}
      */
-    @Setting
+    @Setting(
+        descKey = "contentCenterMap.desc",
+        labelKey = "contentCenterMap.label"
+    )
     private String contentCenterMap
         = "/WEB-INF/resources/content-center-map.xml";
 
-    @Setting
+    @Setting(
+        descKey = "defaultItemResolverClassNames.desc",
+        labelKey = "defaultItemResolverClassNames.label"
+    )
     private List<String> defaultItemResolverClassNames = Arrays.asList(
         new String[]{
             SimpleItemResolver.class.getName()
@@ -310,87 +422,165 @@ public class CMSConfig {
 //            DefaultTemplateResolver.class.getName(),
 //            TemplateResolver.class.getName()
 //        });
-    @Setting
+    @Setting(
+        descKey = "itemSearchDefaultTab.desc",
+        labelKey = "itemSearchDefaultTab.label"
+    )
     private String itemSearchDefaultTab = "flatBrowse";
 
-    @Setting
+    @Setting(
+        descKey = "itemSearchFlatBrowsePanePageSize.desc",
+        labelKey = "itemSearchFlatBrowsePanePageSize.label"
+    )
     private int itemSearchFlatBrowsePanePageSize = 20;
 
-    @Setting
+    @Setting(
+        descKey = "folderBrowseListSize.desc",
+        labelKey = "folderBrowseListSize.label"
+    )
     private int folderBrowseListSize = 20;
 
-    @Setting
+    @Setting(
+        descKey = "folderAtoZShowLimit.desc",
+        labelKey = "folderAtoZShowLimit.label"
+    )
     private int folderAtoZShowLimit = 100;
 
-    @Setting
+    @Setting(
+        descKey = "useOldStyleItemLifecycleItemPane.desc",
+        labelKey = "useOldStyleItemLifecycleItemPane.label"
+    )
     private boolean useOldStyleItemLifecycleItemPane = false;
 
-    @Setting
+    @Setting(
+        descKey = "threadPublishing.desc",
+        labelKey = "threadPublishing.label"
+    )
     private boolean threadPublishing = false;
 
-    @Setting
+    @Setting(
+        descKey = "publishingFailureSender.desc",
+        labelKey = "publishingFailureSender.label"
+    )
     private String publishingFailureSender = "";
 
-    @Setting
+    @Setting(
+        descKey = "publishingFailureReceiver.desc",
+        labelKey = "publishingFailureReceiver.label"
+    )
     private String publishingFailureReceiver = "";
 
-    @Setting
+    @Setting(
+        descKey = "imageBrowserThumbnailMaxWidth.desc",
+        labelKey = "imageBrowserThumbnailMaxWidth.label"
+    )
     private int imageBrowserThumbnailMaxWidth = 50;
 
-    @Setting
+    @Setting(
+        descKey = "imageBrowserThumbnailMaxHeight.desc",
+        labelKey = "imageBrowserThumbnailMaxHeight.label"
+    )
     private int imageBrowserThumbnailMaxHeight = 50;
 
-    @Setting
+    @Setting(
+        descKey = "imageBrowserCaptionSize.desc",
+        labelKey = "imageBrowserCaptionSize.label"
+    )
     private int imageBrowserCaptionSize = 50;
 
-    @Setting
+    @Setting(
+        descKey = "imageBrowserDescriptionSize.desc",
+        labelKey = "imageBrowserDescriptionSize.label"
+    )
     private int imageBrowserDescriptionSize = 400;
 
-    @Setting
+    @Setting(
+        descKey = "imageBrowserTitleSize.desc",
+        labelKey = "imageBrowserTitleSize.label"
+    )
     private int imageBrowserTitleSize = 200;
 
-    @Setting
+    @Setting(
+        descKey = "imageCacheEnabled.desc",
+        labelKey = "imageCacheEnabled.label"
+    )
     private boolean imageCacheEnabled = true;
 
-    @Setting
+    @Setting(
+        descKey = "imageCachePrefetchEnabled.desc",
+        labelKey = "imageCachePrefetchEnabled.label"
+    )
     private boolean imageCachePrefetchEnabled = false;
 
-    @Setting
+    @Setting(
+        descKey = "imageCacheMaxSize.desc",
+        labelKey = "imageCacheMaxSize.label"
+    )
     private int imageCacheMaxSize = 100;
 
-    @Setting
+    @Setting(
+        descKey = "imageCacheMaxAge.desc",
+        labelKey = "imageCacheMaxAge.label"
+    )
     private int imageCacheMaxAge = 300;
 
-    @Setting
+    @Setting(
+        descKey = "attachPersonOrgaUnitsStep.desc",
+        labelKey = "attachPersonOrgaUnitsStep.label"
+    )
     private boolean attachPersonOrgaUnitsStep = true;
 
-    @Setting
+    @Setting(
+        descKey = "personOrgaUnitsStepSortKey.desc",
+        labelKey = "personOrgaUnitsStepSortKey.label"
+    )
     private int personOrgaUnitsStepSortKey = 20;
 
-    @Setting
+    @Setting(
+        descKey = "enableXmlCache.desc",
+        labelKey = "enableXmlCache.label"
+    )
     private boolean enableXmlCache = false;
 
-    @Setting
+    @Setting(
+        descKey = "xmlCacheSize.desc",
+        labelKey = "xmlCacheSize.label"
+    )
     private int xmlCacheSize = 2500;
 
-    @Setting
+    @Setting(
+        descKey = "xmlCacheAge.desc",
+        labelKey = "xmlCacheAge.label"
+    )
     private int xmlCacheAge = 60 * 60 * 24;
 
-    @Setting
+    @Setting(
+        descKey = "categoryAuthoringAddForm.desc",
+        labelKey = "categoryAuthoringAddForm.label"
+    )
     private String categoryAuthoringAddForm = ItemCategoryPicker.class.getName();
 
-    @Setting
+    @Setting(
+        descKey = "categoryAuthoringExtension.desc",
+        labelKey = "categoryAuthoringExtension.label"
+    )
     private String categoryAuthoringExtension = ItemCategoryExtension.class
         .getName();
 
-    @Setting
+    @Setting(
+        descKey = "categoryPickerAjaxExpandAll.desc",
+        labelKey = "categoryPickerAjaxExpandAll.label"
+    )
     private boolean categoryPickerAjaxExpandAll = false;
 
     /**
      * Max length of the description of a link (in database max length are 4000
      * characters)
      */
-    @Setting
+    @Setting(
+        descKey = "linkDescMaxLength.desc",
+        labelKey = "linkDescMaxLength.label"
+    )
     private int linkDescMaxLength = 400;
 
     public static CMSConfig getConfig() {

ccm-cms/src/main/java/org/libreccm/ui/admin/contentsections/ContentSectionAdminMessages.java

@@ -0,0 +1,127 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.libreccm.ui.admin.contentsections;
+
+import org.libreccm.l10n.GlobalizationHelper;
+import org.librecms.CmsConstants;
+
+import java.text.MessageFormat;
+import java.util.AbstractMap;
+import java.util.List;
+import java.util.ResourceBundle;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.inject.Named;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Named("ContentSectionAdminMessages")
+public class ContentSectionAdminMessages extends AbstractMap<String, String> {
+
+    /**
+     * Provides access to the locale negoiated by LibreCCM.
+     */
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    /**
+     * The {@link ResourceBundle} to use.
+     */
+    private ResourceBundle messages;
+
+    /**
+     * Loads the resource bundle.
+     */
+    @PostConstruct
+    private void init() {
+        messages = ResourceBundle.getBundle(
+            CmsConstants.CONTENT_SECTION_DESC_BUNDLE,
+            globalizationHelper.getNegotiatedLocale()
+        );
+    }
+
+    /**
+     * Retrieves a message from the resource bundle.
+     *
+     * @param key The key of the message.
+     *
+     * @return The translated message or {@code ???message???} if the the key is
+     *         not found in the resource bundle (message is replaced with the
+     *         key).
+     */
+    public String getMessage(final String key) {
+        if (messages.containsKey(key)) {
+            return messages.getString(key);
+        } else {
+            return String.format("???%s???", key);
+        }
+    }
+
+    /**
+     * Retrieves a message with placeholders.
+     *
+     * @param key        The key of the message.
+     * @param parameters The parameters for the placeholders.
+     *
+     * @return The translated message or {@code ???message???} if the the key is
+     *         not found in the resource bundle (message is replaced with the
+     *         key).
+     */
+    public String getMessage(
+        final String key, final List<Object> parameters
+    ) {
+        return getMessage(key, parameters.toArray());
+    }
+
+    /**
+     * The translated message or {@code ???message???} if the the key is not
+     * found in the resource bundle (message is replaced with the key).
+     *
+     * @param key        The key of the message.
+     * @param parameters The parameters for the placeholders.
+     *
+     * @return The translated message or {@code ???message???} if the the key is
+     *         not found in the resource bundle (message is replaced with the
+     *         key).
+     */
+    public String getMessage(
+        final String key, final Object[] parameters
+    ) {
+        if (messages.containsKey(key)) {
+            return MessageFormat.format(messages.getString(key), parameters);
+        } else {
+            return String.format("???%s???", key);
+        }
+    }
+
+    @Override
+    public String get(final Object key) {
+        return get((String) key);
+    }
+
+    public String get(final String key) {
+        return getMessage(key);
+    }
+
+    @Override
+    public Set<Entry<String, String>> entrySet() {
+        return messages
+            .keySet()
+            .stream()
+            .collect(
+                Collectors.toMap(key -> key, key -> messages.getString(key))
+            )
+            .entrySet();
+    }
+
+}

ccm-cms/src/main/java/org/libreccm/ui/admin/contentsections/ContentSectionApplicationController.java

@@ -0,0 +1,134 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.libreccm.ui.admin.contentsections;
+
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.ui.admin.applications.ApplicationController;
+import org.librecms.contentsection.ContentSection;
+import org.librecms.contentsection.ContentSectionManager;
+import org.librecms.contentsection.ContentSectionRepository;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.mvc.Controller;
+import javax.mvc.Models;
+import javax.transaction.Transactional;
+import javax.ws.rs.FormParam;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Controller
+@Path("/applications/content-sections")
+public class ContentSectionApplicationController
+    implements ApplicationController {
+
+    @Inject
+    private Models models;
+
+    @Inject
+    private ContentSectionManager sectionManager;
+
+    @Inject
+    private ContentSectionRepository sectionRepository;
+
+    @GET
+    @Path("/")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    @Override
+    public String getApplication() {
+        final List<ContentSection> contentSections = sectionRepository.findAll();
+
+        models.put(
+            "sections",
+            sectionRepository
+                .findAll()
+                .stream()
+                .map(this::buildContentSectionTableRow)
+                .sorted()
+                .collect(Collectors.toList())
+        );
+
+        return "org/libreccm/ui/admin/applications/content-sections/content-sections.xhtml";
+    }
+
+    @POST
+    @Path("/add")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String addContentSection(
+        @FormParam("label") final String label
+    ) {
+        sectionManager.createContentSection(label);
+
+        return "redirect:applications/content-sections";
+    }
+
+    @POST
+    @Path("/{sectionId}/update")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String updateContentSection(
+        @PathParam("sectionId") final long sectionId,
+        @FormParam("label") final String label
+    ) {
+        final Optional<ContentSection> result = sectionRepository
+            .findById(sectionId);
+
+        if (result.isPresent()) {
+            sectionManager.renameContentSection(result.get(), label);
+        }
+
+        return "redirect:applications/content-sections";
+    }
+
+    @POST
+    @Path("/{sectionId}/delete")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String deleteContentSection(
+        @PathParam("sectionId") final long sectionId,
+        @FormParam("confirmed") final String confirmed
+    ) {
+        final Optional<ContentSection> result = sectionRepository
+            .findById(sectionId);
+
+        if (result.isPresent() && "true".equals(confirmed)) {
+            sectionRepository.delete(result.get());
+        }
+
+        return "redirect:applications/content-sections";
+    }
+
+    private ContentSectionTableRow buildContentSectionTableRow(
+        final ContentSection section
+    ) {
+        final ContentSectionTableRow row = new ContentSectionTableRow();
+        row.setSectionId(section.getObjectId());
+        row.setUuid(section.getUuid());
+        row.setLabel(section.getLabel());
+
+        return row;
+    }
+
+}

ccm-cms/src/main/java/org/libreccm/ui/admin/contentsections/ContentSectionTableRow.java

@@ -0,0 +1,57 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.libreccm.ui.admin.contentsections;
+
+import java.util.Comparator;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class ContentSectionTableRow implements
+    Comparable<ContentSectionTableRow> {
+
+    private long sectionId;
+
+    private String uuid;
+
+    private String label;
+
+    public long getSectionId() {
+        return sectionId;
+    }
+
+    protected void setSectionId(long sectionId) {
+        this.sectionId = sectionId;
+    }
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    protected void setUuid(final String uuid) {
+        this.uuid = uuid;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+
+    protected void setLabel(final String label) {
+        this.label = label;
+    }
+
+    @Override
+    public int compareTo(final ContentSectionTableRow other) {
+        return Comparator
+            .nullsFirst(
+                Comparator
+                    .comparing(ContentSectionTableRow::getLabel)
+                    .thenComparing(ContentSectionTableRow::getSectionId)
+            ).compare(this, other);
+    }
+
+}

ccm-cms/src/main/java/org/librecms/Cms.java

@@ -23,6 +23,7 @@ import org.libreccm.modules.RequiredModule;
 import org.libreccm.modules.ShutdownEvent;
 import org.libreccm.modules.UnInstallEvent;
 import org.libreccm.pagemodel.PageModelComponentModel;
+import org.libreccm.ui.admin.contentsections.ContentSectionApplicationController;
 import org.libreccm.web.ApplicationType;
 import org.libreccm.web.CcmApplication;
 import org.librecms.assets.AssetTypes;
@@ -80,7 +81,8 @@ import java.util.Properties;
             settingsPane = SettingsPane.class,
             descBundle = CmsConstants.CONTENT_SECTION_DESC_BUNDLE,
             creator = ContentSectionCreator.class,
-            servletPath = "/templates/servlet/content-section"
+            servletPath = "/templates/servlet/content-section",
+            applicationController = ContentSectionApplicationController.class
         ),
         @ApplicationType(
             name = "org.librecms.pages.Pages",
@@ -93,6 +95,9 @@ import java.util.Properties;
             servletPath = "/templates/servlet/pages"
         )
     },
+    configurations = {
+        org.arsdigita.cms.CMSConfig.class
+    },
     pageModelComponentModels = {
         @PageModelComponentModel(
             modelClass = CategorizedItemComponent.class,

ccm-cms/src/main/java/org/librecms/contentsection/AbstractContentItemImExporter.java

@@ -10,6 +10,7 @@ import org.libreccm.imexport.AbstractEntityImExporter;
 import org.libreccm.imexport.Exportable;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.inject.Inject;
@@ -42,4 +43,19 @@ public abstract class AbstractContentItemImExporter<T extends ContentItem>
         itemRepository.save(entity);
     }
 
+    @Override
+    protected T reloadEntity(final T entity) {
+        return itemRepository
+            .findById(
+                Objects.requireNonNull(entity).getObjectId(), getEntityClass()
+            ).orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "ContentItem entity %s not found in database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+
 }

ccm-cms/src/main/java/org/librecms/contentsection/ContentSectionImExporter.java

@@ -0,0 +1,62 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.librecms.contentsection;
+
+import org.libreccm.imexport.AbstractEntityImExporter;
+import org.libreccm.imexport.Exportable;
+import org.libreccm.imexport.Processes;
+
+import java.util.Collections;
+import java.util.Objects;
+import java.util.Set;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.transaction.Transactional;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Processes(ContentSection.class)
+public class ContentSectionImExporter
+    extends AbstractEntityImExporter<ContentSection> {
+
+    @Inject
+    private ContentSectionRepository sectionRepository;
+
+    @Override
+    public Class<ContentSection> getEntityClass() {
+        return ContentSection.class;
+    }
+
+    @Override
+    protected Set<Class<? extends Exportable>> getRequiredEntities() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected void saveImportedEntity(final ContentSection entity) {
+        sectionRepository.save(entity);
+    }
+
+    @Override
+    protected ContentSection reloadEntity(final ContentSection entity) {
+        return sectionRepository
+            .findById(Objects.requireNonNull(entity).getObjectId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "ContentSection entity %s not found in database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+
+}

ccm-cms/src/main/java/org/librecms/contenttypes/ArticleImExporter.java

@@ -19,7 +19,7 @@ import javax.enterprise.context.RequestScoped;
 public class ArticleImExporter extends AbstractContentItemImExporter<Article> {
 
     @Override
-    protected Class<Article> getEntityClass() {
+    public Class<Article> getEntityClass() {
         return Article.class;
     }
 

ccm-cms/src/main/java/org/librecms/contenttypes/EventImExporter.java

@@ -19,7 +19,7 @@ import javax.enterprise.context.RequestScoped;
 public class EventImExporter extends AbstractContentItemImExporter<Event> {
 
     @Override
-    protected Class<Event> getEntityClass() {
+    public Class<Event> getEntityClass() {
         return Event.class;
     }
 

ccm-cms/src/main/java/org/librecms/contenttypes/MultiPartArticleImExporter.java

@@ -20,7 +20,7 @@ public class MultiPartArticleImExporter
     extends AbstractContentItemImExporter<MultiPartArticle> {
 
     @Override
-    protected Class<MultiPartArticle> getEntityClass() {
+    public Class<MultiPartArticle> getEntityClass() {
         return MultiPartArticle.class;
     }
     

ccm-cms/src/main/java/org/librecms/contenttypes/NewsImExporter.java

@@ -19,7 +19,7 @@ import javax.enterprise.context.RequestScoped;
 public class NewsImExporter extends AbstractContentItemImExporter<News> {
 
     @Override
-    protected Class<News> getEntityClass() {
+    public Class<News> getEntityClass() {
         return News.class;
     }
 

ccm-cms/src/main/resources/WEB-INF/views/org/libreccm/ui/admin/applications/content-sections/content-sections.xhtml

@@ -0,0 +1,115 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" 
+      xmlns:bootstrap="http://xmlns.jcp.org/jsf/composite/components/bootstrap"
+      xmlns:c="http://xmlns.jcp.org/jsp/jstl/core"
+      xmlns:f="http://xmlns.jcp.org/jsf/core"
+      xmlns:h="http://xmlns.jcp.org/jsf/html"
+      xmlns:libreccm="http://xmlns.jcp.org/jsf/composite/components/libreccm"
+      xmlns:ui="http://xmlns.jcp.org/jsf/facelets">
+    <ui:composition template="/WEB-INF/views/org/libreccm/ui/admin/ccm-admin.xhtml">
+
+        <ui:param name="activePage" value="applications" />
+        <ui:param name="title" value="#{AdminMessages['applications.label']}" />
+
+        <ui:define name="breadcrumb">
+            <li class="breadcrumb-item">
+                #{AdminMessages['applications.label']}
+            </li>
+            <li class="breadcrumb-item active">
+                #{ContentSectionAdminMessages['application_title']}
+            </li>
+        </ui:define>
+
+        <ui:define name="main">
+            <div class="container">
+                <h1>#{ContentSectionAdminMessages['application_title']}</h1>
+
+                <div class="mb-2">
+                    <bootstrap:modalForm actionTarget="#{mvc.uri('ContentSectionApplicationController#addContentSection')}"
+                                         buttonIcon="plus-circle"
+                                         buttonText="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.add']}"
+                                         buttonTextClass="text-right"
+                                         dialogId="contentsection-add-form"
+                                         >
+                        <f:facet name="title">
+                            <h3>#{ContentSectionAdminMessages['contentsections.ui.admin.instances.add_form.title']}</h3>
+                        </f:facet>
+                        <f:facet name="body">
+                            <bootstrap:formGroupText help="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.add_form.name.help']}"
+                                                     inputId="contentsection-add-form-name"
+                                                     label="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.add_form.name.label']}" 
+                                                     name="label" 
+                                                     pattern="[\\w-.]"/>
+                        </f:facet>
+                        <f:facet name="footer">
+                            <button class="btn btn-secondary" 
+                                    data-dismiss="modal"
+                                    type="button" >
+                                #{ContentSectionAdminMessages['contentsections.ui.admin.instances.add_form.cancel']}
+                            </button>
+                            <button type="submit" class="btn btn-primary">
+                                #{ContentSectionAdminMessages['contentsections.ui.admin.instances.add_form.submit']}
+                            </button>
+                        </f:facet>
+                    </bootstrap:modalForm>
+                </div>
+
+                <table class="table table-hover">
+                    <thead>
+                        <tr>
+                            <th>#{ContentSectionAdminMessages['contentsections.ui.admin.instances_table.col_name.header']}</th>
+                            <th class="text-center" colspan="2">#{ContentSectionAdminMessages['contentsections.ui.admin.instances_table.col_name.actions']}</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        <c:forEach items="#{sections}" var="section">
+                            <tr>
+                                <td>#{section.label}</td>
+                                <td class="text-center">
+                                    <bootstrap:modalForm actionTarget="#{mvc.uri('ContentSectionApplicationController#updateContentSection', { 'sectionId': section.sectionId })}"
+                                                         buttonIcon="plus-circle"
+                                                         buttonText="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.edit']}"
+                                                         buttonTextClass="text-right"
+                                                         dialogId="contentsection-#{section.sectionId}-edit-form"
+                                                         >
+                                        <f:facet name="title">
+                                            <h3>#{ContentSectionAdminMessages['contentsections.ui.admin.instances.add_form.title']}</h3>
+                                        </f:facet>
+                                        <f:facet name="body">
+                                            <bootstrap:formGroupText help="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.edit_form.name.help']}"
+                                                                     inputId="contentsection-add-form-name"
+                                                                     label="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.edit_form.name.label']}" 
+                                                                     name="label" 
+                                                                     pattern="[\\w-.]" 
+                                                                     value="#{section.label}" />
+                                        </f:facet>
+                                        <f:facet name="footer">
+                                            <button class="btn btn-secondary" 
+                                                    data-dismiss="modal"
+                                                    type="button" >
+                                                #{ContentSectionAdminMessages['contentsections.ui.admin.instances.edit_form.cancel']}
+                                            </button>
+                                            <button type="submit" class="btn btn-primary">
+                                                #{ContentSectionAdminMessages['contentsections.ui.admin.instances.edit_form.submit']}
+                                            </button>
+                                        </f:facet>
+                                    </bootstrap:modalForm>
+                                </td>
+                                <td class="text-center">
+                                    <libreccm:deleteDialog actionTarget="#{mvc.uri('ContentSectionApplicationController#deleteContentSection', { 'sectionId': section.sectionId })}"
+                                                           buttonText="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.delete_dialog.button_text']}" 
+                                                           cancelLabel="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.delete_dialog.cancel']}"
+                                                           confirmLabel="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.delete_dialog.confirm']}"
+                                                           dialogId="contentsection-#{section.sectionId}-deletedialog"
+                                                           dialogTitle="#{ContentSectionAdminMessages['contentsections.ui.admin.instances.delete_dialog.title']}"
+                                                           message="#{ContentSectionAdminMessages.getMessage('contentsections.ui.admin.instances.delete_dialog.message', [section.label])}" />
+                                </td>
+                            </tr>
+                        </c:forEach>
+                    </tbody>
+                </table>
+            </div>
+        </ui:define>
+
+    </ui:composition>
+</html>

ccm-cms/src/main/resources/com/arsdigita/cms/CMSConfig.properties

@@ -0,0 +1,126 @@
+
+title=CMS Configuration
+description=Various settings for customizing content handling
+defaultItemTemplatePath.desc=Path of the default JSP template for Content Items. Only used by the legacy presentation system.
+defaultItemTemplatePath.label=Default Item Template Path
+defaultFolderTemplatePath.label=Default Folder Template Path
+defaultFolderTemplatePath.desc=Path of the default JSP template for folders. Only used by the legacy presentation system.
+templateRootPath.label=Template Root Path
+templateRootPath.desc=Where to look for JSP templates. Only used by the legacy presentation system.
+itemAdapters.label=Item Adapters
+itemAdapters.desc=Path of the the item adapter file
+useStreamlinedCreation.label=Use Streamlined Creation?
+useStreamlinedCreation.desc=
+dhtmlEditorConfig.label=DHTML Editor Configuration
+dhtmlEditorConfig.desc=Configuration of the Rich Text Editor
+dhtmlEditorPlugins.label=DHTML Editor Plugins
+dhtmlEditorPlugins.desc=
+dhtmlEditorHiddenButtons.label=DHTML Editor Hidden Buttons
+dhtmlEditorHiddenButtons.desc=
+hideAdminTabs.label=Hide Admin Tabs?
+hideAdminTabs.desc=Hide Admin Tabs for none admin users?
+hideFolderIndexCheckbox.label=Hide Folder Index Checkbox?
+hideFolderIndexCheckbox.desc=
+hideLaunchDate.label=Hide Launch Date?
+hideLaunchDate.desc=
+requireLaunchDate.label=Require Launch Date?
+requireLaunchDate.desc=
+hideTemplatesTab.label=Hide Templates Tab?
+hideTemplatesTab.desc=
+hideTextAssetUploadFile.label=Hide Text Asset Upload File?
+hideTextAssetUploadFile.desc=
+hideTimezone.label=Hide Timezone?
+hideTimezone.desc=
+saveTextCleansWordTags.label=Save Text Cleans Word Tags?
+saveTextCleansWordTags.desc=
+disableFileAssetExtraction.desc=
+disableFileAssetExtraction.label=Disable File Asset Extraction?
+deleteWorkflowAfterPublication.label=Delete Workflow after publication?
+deleteWorkflowAfterPublication.desc=Whether an item's workflow should be deleted, once the item has been \n(re)published.
+soonExpiredTimespanDays.desc=
+soonExpiredTimespanDays.label=Soon Expired Timespan Days
+soonExpiredTimespanMonths.label=Soon expired timespan months
+soonExpiredTimespanMonths.desc=
+unpublishedNotFound.label=Unpublished not found?
+unpublishedNotFound.desc=Does a redirect to the unpublished item generate not found error?
+linksOnlyInSameSubsite.desc=
+linksOnlyInSameSubsite.label=Links Only In Same Subsite?
+hideResetLifecycleLink.desc=
+hideResetLifecycleLink.label=Hide Reset Lifecycle Link?
+scoreTitleAndKeywords.label=Score title and keywords?
+scoreTitleAndKeywords.desc=
+titleWeight.desc=
+titleWeight.label=Title Weight
+keywordWeight.label=Keyword Weight
+keywordWeight.desc=
+limitItemSearchToContentSection.desc=
+limitItemSearchToContentSection.label=Limit Item Search to Content Section?
+skipAssetSteps.label=Skip Asset Steps?
+skipAssetSteps.desc=
+mandatoryDescriptions.label=Mandatory Descriptions?
+mandatoryDescriptions.desc=
+deleteLifecycleWhenComplete.label=Delete Lifecycle when complete?
+deleteLifecycleWhenComplete.desc=
+deleteWorkflowNotificationWhenSend.label=Delete Workflow Notification when send?
+deleteWorkflowNotificationWhenSend.desc=
+deleteExpiryNotificationsWhenSent.label=Delete Expiry Notifications when sent
+deleteExpiryNotificationsWhenSent.desc=
+defaultNotificationTime.label=Default Notification Time
+defaultNotificationTime.desc=Amount of time (in hours) before the expiration of a content item that  users in the Alert Recipient role are alerted via email
+notifyAuthorOnLifecycle.label=Notify author on lifecycle?
+notifyAuthorOnLifecycle.desc=
+contentCenterMap.label=Content Center Map
+contentCenterMap.desc=
+defaultItemResolverClassNames.label=Default Item Resolver class names
+defaultItemResolverClassNames.desc=
+itemSearchDefaultTab.label=Item Search Default Tab
+itemSearchDefaultTab.desc=
+itemSearchFlatBrowsePanePageSize=Item Search Flat Browse Pane Page Size
+folderBrowseListSize.label=Folder Browse List Size
+folderBrowseListSize.desc=
+folderAtoZShowLimit.label=Folder A to Z  Show Limit
+folderAtoZShowLimit.desc=
+useOldStyleItemLifecycleItemPane.label=Use Old Style Item Lifecycle Item Pane?
+useOldStyleItemLifecycleItemPane.desc=
+threadPublishing.label=Thread Publishing
+threadPublishing.desc=
+publishingFailureSender.label=Publishing Failure Sender
+publishingFailureSender.desc=
+publishingFailureReceiver.label=Publishing Failure Receiver
+publishingFailureReceiver.desc=
+imageBrowserThumbnailMaxWidth.label=Image Browser Thumbnail Max Width
+imageBrowserThumbnailMaxWidth.desc=
+imageBrowserThumbnailMaxHeight.label=Image Browser Thumbnail Max Height
+imageBrowserThumbnailMaxHeight.desc=
+imageBrowserCaptionSize.label=Image Browser Caption Size
+imageBrowserCaptionSize.desc=
+imageBrowserDescriptionSize.label=Image Browser Description Size
+imageBrowserDescriptionSize.desc=
+imageBrowserTitleSize.label=Image Browser Title Size
+imageBrowserTitleSize.desc=
+imageCacheEnabled.label=Image Cache Enabled?
+imageCacheEnabled.desc=
+imageCachePrefetchEnabled.label=Image Cache Prefetch Enabled
+imageCachePrefetchEnabled.desc=
+imageCacheMaxSize.label=Image Cache Max Size
+imageCacheMaxSize.desc=
+imageCacheMaxAge.label=Image Cache Max Age
+imageCacheMaxAge.desc=
+attachPersonOrgaUnitsStep.label=Attach Person Orga Units Step enabled?
+attachPersonOrgaUnitsStep.desc=
+personOrgaUnitsStepSortKey.label=Person Orga Units Step Sort Key
+personOrgaUnitsStepSortKey.desc=
+enableXmlCache.label=Enable XML Cache?
+enableXmlCache.desc=
+xmlCacheSize.label=XML Cache Size
+xmlCacheSize.desc=
+xmlCacheAge.label=XML Cache Age
+xmlCacheAge.desc=
+categoryAuthoringAddForm.label=Category Authoring Add Form
+categoryAuthoringAddForm.desc=
+categoryAuthoringExtension.label=Category Authoring Extension
+categoryAuthoringExtension.desc=
+categoryPickerAjaxExpandAll.label=Category Picker AJAX Expand All?
+categoryPickerAjaxExpandAll.desc=
+linkDescMaxLength.label=Link description max length
+linkDescMaxLength.desc=

ccm-cms/src/main/resources/com/arsdigita/cms/CMSConfig_de.properties

@@ -0,0 +1,126 @@
+
+title=CMS Konfiguration
+description=Einstellungen bez\u00fcglich Bearbeitung und Anzeige von Inhalten
+defaultItemTemplatePath.desc=Pfad der Standard-JSP-Template f\u00fcr Content Items. Nur vom alten Pr\u00e4sentationssystem genutzt.
+defaultItemTemplatePath.label=Pfad der Standard Template f\u00fcr Content Items
+defaultFolderTemplatePath.label=Pfad der Standard-JSP-Template f\u00fcr Ordner
+defaultFolderTemplatePath.desc=Pfad der Standard-JSP-Template f\u00fcr Ordner. Nur vom alten Pr\u00e4sentationssystem genutzt.
+templateRootPath.label=Suchpfad f\u00fcr Templates
+templateRootPath.desc=Ordner in dem nach JSP-Templates gesucht wird. Nur vom alten Pr\u00e4sentationssystem genutzt.
+itemAdapters.label=Item Adapter
+itemAdapters.desc=Pfad der Item-Adapter-Datei
+useStreamlinedCreation.label=Use Streamlined Creation?
+useStreamlinedCreation.desc=
+dhtmlEditorConfig.label=DHTML Editor Konfiguration
+dhtmlEditorConfig.desc=Konfiguration des Text Editors
+dhtmlEditorPlugins.label=DHTML Editor Plugins
+dhtmlEditorPlugins.desc=
+dhtmlEditorHiddenButtons.label=DHTML Editor Deaktivierte Funktionen
+dhtmlEditorHiddenButtons.desc=
+hideAdminTabs.label=Admin Tabs verstecken?
+hideAdminTabs.desc=Sollen die Admin-Tabs f\u00fcr Benutzer*innen ohnen Administrations-Rechte sichtbar sein?
+hideFolderIndexCheckbox.label=Index-Checkbox f\u00fcr Ordner verstecken?
+hideFolderIndexCheckbox.desc=
+hideLaunchDate.label=Start-Datum verstecken?
+hideLaunchDate.desc=
+requireLaunchDate.label=Startdatum erforderlich?
+requireLaunchDate.desc=
+hideTemplatesTab.label=Vorlaben Tab verbergen?
+hideTemplatesTab.desc=
+hideTextAssetUploadFile.label=Hochladen f\u00fcr Text-Assets verbergen?
+hideTextAssetUploadFile.desc=
+hideTimezone.label=Zeitzone verstecken?
+hideTimezone.desc=
+saveTextCleansWordTags.label=Speichern bereinigt Word Tags?
+saveTextCleansWordTags.desc=
+disableFileAssetExtraction.desc=
+disableFileAssetExtraction.label=Analyse von hochgeladenen Dateien deaktivieren?
+deleteWorkflowAfterPublication.label=Arbeitsablauf nach dem Publizieren l\u00f6schen?
+deleteWorkflowAfterPublication.desc=
+soonExpiredTimespanDays.desc=
+soonExpiredTimespanDays.label=Soon Expired Timespan Days
+soonExpiredTimespanMonths.label=Soon expired timespan months
+soonExpiredTimespanMonths.desc=
+unpublishedNotFound.label=Unpublished not found?
+unpublishedNotFound.desc=Does a redirect to the unpublished item generate not found error?
+linksOnlyInSameSubsite.desc=
+linksOnlyInSameSubsite.label=Links Only In Same Subsite?
+hideResetLifecycleLink.desc=
+hideResetLifecycleLink.label=Hide Reset Lifecycle Link?
+scoreTitleAndKeywords.label=Score title and keywords?
+scoreTitleAndKeywords.desc=
+titleWeight.desc=
+titleWeight.label=Title Weight
+keywordWeight.label=Keyword Weight
+keywordWeight.desc=
+limitItemSearchToContentSection.desc=
+limitItemSearchToContentSection.label=Limit Item Search to Content Section?
+skipAssetSteps.label=Skip Asset Steps?
+skipAssetSteps.desc=
+mandatoryDescriptions.label=Mandatory Descriptions?
+mandatoryDescriptions.desc=
+deleteLifecycleWhenComplete.label=Delete Lifecycle when complete?
+deleteLifecycleWhenComplete.desc=
+deleteWorkflowNotificationWhenSend.label=Delete Workflow Notification when send?
+deleteWorkflowNotificationWhenSend.desc=
+deleteExpiryNotificationsWhenSent.label=Delete Expiry Notifications when sent
+deleteExpiryNotificationsWhenSent.desc=
+defaultNotificationTime.label=Default Notification Time
+defaultNotificationTime.desc=Amount of time (in hours) before the expiration of a content item that users in the Alert Recipient role are alerted via email
+notifyAuthorOnLifecycle.label=Notify author on lifecycle?
+notifyAuthorOnLifecycle.desc=
+contentCenterMap.label=Content Center Map
+contentCenterMap.desc=
+defaultItemResolverClassNames.label=Default Item Resolver class names
+defaultItemResolverClassNames.desc=
+itemSearchDefaultTab.label=Item Search Default Tab
+itemSearchDefaultTab.desc=
+itemSearchFlatBrowsePanePageSize=Item Search Flat Browse Pane Page Size
+folderBrowseListSize.label=Folder Browse List Size
+folderBrowseListSize.desc=
+folderAtoZShowLimit.label=Folder A to Z  Show Limit
+folderAtoZShowLimit.desc=
+useOldStyleItemLifecycleItemPane.label=Use Old Style Item Lifecycle Item Pane?
+useOldStyleItemLifecycleItemPane.desc=
+threadPublishing.label=Thread Publishing
+threadPublishing.desc=
+publishingFailureSender.label=Publishing Failure Sender
+publishingFailureSender.desc=
+publishingFailureReceiver.label=Publishing Failure Receiver
+publishingFailureReceiver.desc=
+imageBrowserThumbnailMaxWidth.label=Image Browser Thumbnail Max Width
+imageBrowserThumbnailMaxWidth.desc=
+imageBrowserThumbnailMaxHeight.label=Image Browser Thumbnail Max Height
+imageBrowserThumbnailMaxHeight.desc=
+imageBrowserCaptionSize.label=Image Browser Caption Size
+imageBrowserCaptionSize.desc=
+imageBrowserDescriptionSize.label=Image Browser Description Size
+imageBrowserDescriptionSize.desc=
+imageBrowserTitleSize.label=Image Browser Title Size
+imageBrowserTitleSize.desc=
+imageCacheEnabled.label=Image Cache Enabled?
+imageCacheEnabled.desc=
+imageCachePrefetchEnabled.label=Image Cache Prefetch Enabled
+imageCachePrefetchEnabled.desc=
+imageCacheMaxSize.label=Image Cache Max Size
+imageCacheMaxSize.desc=
+imageCacheMaxAge.label=Image Cache Max Age
+imageCacheMaxAge.desc=
+attachPersonOrgaUnitsStep.label=Attach Person Orga Units Step enabled?
+attachPersonOrgaUnitsStep.desc=
+personOrgaUnitsStepSortKey.label=Person Orga Units Step Sort Key
+personOrgaUnitsStepSortKey.desc=
+enableXmlCache.label=Enable XML Cache?
+enableXmlCache.desc=
+xmlCacheSize.label=XML Cache Size
+xmlCacheSize.desc=
+xmlCacheAge.label=XML Cache Age
+xmlCacheAge.desc=
+categoryAuthoringAddForm.label=Category Authoring Add Form
+categoryAuthoringAddForm.desc=
+categoryAuthoringExtension.label=Category Authoring Extension
+categoryAuthoringExtension.desc=
+categoryPickerAjaxExpandAll.label=Category Picker AJAX Expand All?
+categoryPickerAjaxExpandAll.desc=
+linkDescMaxLength.label=Link description max length
+linkDescMaxLength.desc=

ccm-cms/src/main/resources/org/librecms/contentsection/ContentSectionResources.properties

@@ -17,3 +17,21 @@
 
 application_title=Content Section
 application_desc=A content section is used to group similar content. 
+contentsections.ui.admin.instances_table.col_name.header=Name
+contentsections.ui.admin.instances_table.col_name.actions=Actions
+contentsections.ui.admin.instances.add_form.title=Create new Content Section
+contentsections.ui.admin.instances.add=Add Content Section
+contentsections.ui.admin.instances.add_form.name.help=The name of the new Content Section. Also used as URL stub, therefore only characters in an URL can be used.
+contentsections.ui.admin.instances.add_form.name.label=Name
+contentsections.ui.admin.instances.add_form.cancel=Cancel
+contentsections.ui.admin.instances.add_form.submit=Create Content Section
+contentsections.ui.admin.instances.delete_dialog.button_text=Delete
+contentsections.ui.admin.instances.delete_dialog.cancel=Cancel
+contentsections.ui.admin.instances.delete_dialog.confirm=Delete Content Section
+contentsections.ui.admin.instances.delete_dialog.title=Content Section l\u00f6schen best\u00e4tigen
+contentsections.ui.admin.instances.delete_dialog.message=Are you sure to delete the Content Section {0}?
+contentsections.ui.admin.instances.edit=Edit
+contentsections.ui.admin.instances.edit_form.name.help=The name of the Content Section. Also used as URL stub, therefore only characters in an URL can be used.
+contentsections.ui.admin.instances.edit_form.name.label=Name
+contentsections.ui.admin.instances.edit_form.cancel=Cancel
+contentsections.ui.admin.instances.edit_form.submit=Save

ccm-cms/src/main/resources/org/librecms/contentsection/ContentSectionResources_de.properties

@@ -17,3 +17,21 @@
 
 application_title=Content Section
 application_desc=A content section is used to group similar content. 
+contentsections.ui.admin.instances_table.col_name.header=Name
+contentsections.ui.admin.instances_table.col_name.actions=Aktionen
+contentsections.ui.admin.instances.add_form.title=Neue Content Section anlegen
+contentsections.ui.admin.instances.add=Content Section hinzuf\u00fcgen
+contentsections.ui.admin.instances.add_form.name.help=Der Name der neuen Content Section. Wird auch als URL-Fragment genutzt, daher sind Zeichen erlaubt, die in einer URL vorkommen d\u00fcrfen.
+contentsections.ui.admin.instances.add_form.name.label=Name
+contentsections.ui.admin.instances.add_form.cancel=Abbrechen
+contentsections.ui.admin.instances.add_form.submit=Content Section anlegen
+contentsections.ui.admin.instances.delete_dialog.button_text=L\u00f6schen
+contentsections.ui.admin.instances.delete_dialog.cancel=Abbrechen
+contentsections.ui.admin.instances.delete_dialog.confirm=Content Section l\u00f6schen
+contentsections.ui.admin.instances.delete_dialog.title=Content Section l\u00f6schen best\u00e4tigen
+contentsections.ui.admin.instances.delete_dialog.message=Sind Sie sicher dass Sie die Content Section {0} l\u00f6schen wollen?
+contentsections.ui.admin.instances.edit=Bearbeiten
+contentsections.ui.admin.instances.edit_form.name.help=Der Name der Content Section. Wird auch als URL-Fragment genutzt, daher sind Zeichen erlaubt, die in einer URL vorkommen d\u00fcrfen.
+contentsections.ui.admin.instances.edit_form.name.label=Name
+contentsections.ui.admin.instances.edit_form.cancel=Abbrechen
+contentsections.ui.admin.instances.edit_form.submit=Speichern

ccm-core/package.json

@@ -0,0 +1,25 @@
+{
+    "name": "ccm-core",
+    "version": "7.0.0",
+    "description": "JavaScript stuff for ccm-core",
+    "main": "index.js",
+    "scripts": {
+        "build": "npm-run-all build:*:*",
+        "build:ccm-admin:js": "parcel build --out-dir target/generated-resources/assets/@admin src/main/typescript/ccm-admin/ccm-admin.ts",
+        "build:ccm-admin:css": "sass src/main/scss/ccm-admin/ccm-admin.scss target/generated-resources/assets/@admin/ccm-admin.css"
+    },
+    "author": "Jens Pelzetter",
+    "license": "LGPL-3.0-or-later",
+    "devDependencies": {
+        "npm-run-all": "^4.1.5",
+        "parcel-bundler": "^1.12.4",
+        "sass": "^1.26.10",
+        "typescript": "^4.0.2"
+    },
+    "dependencies": {
+        "bootstrap": "^4.5.2",
+        "bootstrap-icons": "^1.0.0",
+        "jquery": "^3.5.1",
+        "popper.js": "^1.16.1"
+    }
+}

ccm-core/pom.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
     <modelVersion>4.0.0</modelVersion>
 
@@ -151,6 +152,10 @@
             <groupId>commons-lang</groupId>
             <artifactId>commons-lang</artifactId>
         </dependency>
+        <dependency>
+            <groupId>commons-validator</groupId>
+            <artifactId>commons-validator</artifactId>
+        </dependency>
 
         <dependency>
             <groupId>oro</groupId>
@@ -307,6 +312,9 @@
                 <directory>src/main/resources</directory>
                 <filtering>true</filtering>
             </resource>
+            <resource>
+                <directory>./target/generated-resources</directory>
+            </resource>
         </resources>
 
         <testResources>
@@ -330,6 +338,39 @@
                     <encoding>${project.build.sourceEncoding}</encoding>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>com.github.eirslett</groupId>
+                <artifactId>frontend-maven-plugin</artifactId>
+                <configuration>
+                    <installDirectory>../node</installDirectory>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>Install node.js and NPM</id>
+                        <goals>
+                            <goal>install-node-and-npm</goal>
+                        </goals>
+                        <configuration>
+                            <nodeVersion>v12.18.3</nodeVersion>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>npm install</id>
+                        <goals>
+                            <goal>npm</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>build</id>
+                        <goals>
+                            <goal>npm</goal>
+                        </goals>
+                        <configuration>
+                            <arguments>run build</arguments>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>

ccm-core/src/main/java/com/arsdigita/bebop/BebopConfig.java

@@ -41,32 +41,59 @@ import java.util.stream.Collectors;
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @Configuration(
-    descKey = "bebop.config.description")
+    descBundle = "com.arsdigita.bebop.BebopConfig",
+    descKey = "description",
+    titleKey = "title"
+)
 public final class BebopConfig {
 
-    @Setting
+    @Setting(
+        descKey = "presenterClassName.desc",
+        labelKey = "presenterClassName.label"
+    )
     private String presenterClassName = PageTransformer.class.getName();
 
-    @Setting
+    @Setting(
+        descKey = "basePageClassName.desc",
+        labelKey = "basePageClassName.label"
+    )
     private String basePageClassName = SimplePage.class.getName();
 
-    @Setting
+    @Setting(
+        descKey = "tidyConfigFile.desc",
+        labelKey = "tidyConfigFile.label"
+    )
     private String tidyConfigFile
                        = "com/arsdigita/bebop/parameters/tidy.properties";
 
-    @Setting
+    @Setting(
+        descKey = "fancyErrors.desc",
+        labelKey = "fancyErrors.label"
+    )
     private Boolean fancyErrors = false;
 
-    @Setting
+    @Setting(
+        descKey = "dcpOnButtons.desc",
+        labelKey = "dcpOnButtons.label"
+    )
     private Boolean dcpOnButtons = true;
 
-    @Setting
+    @Setting(
+        descKey = "dcpOnLinks.desc",
+        labelKey = "dcpOnLinks.label"
+    )
     private Boolean dcpOnLinks = false;
 
-    @Setting
+    @Setting(
+        descKey = "treeSelectEnabled.desc",
+        labelKey = "treeSelectEnabled.label"
+    )
     private Boolean treeSelectEnabled = false;
 
-    @Setting
+    @Setting(
+        descKey = "dhtmlEditors.desc",
+        labelKey = "dhtmlEditors.label"
+    )
     private Set<String> dhtmlEditors = new HashSet<>(
         Arrays.asList(new String[]{BebopConstants.BEBOP_XINHAEDITOR,
                                    BebopConstants.BEBOP_FCKEDITOR,
@@ -74,14 +101,23 @@ public final class BebopConfig {
                                    BebopConstants.BEBOP_CCMEDITOR,
                                    BebopConstants.BEBOP_TINYMCE_EDITOR}));
 
-    @Setting
+    @Setting(
+        descKey = "defaultDhtmlEditor.desc",
+        labelKey = "defaultDhtmlEditor.label"
+    )
     private String defaultDhtmlEditor = BebopConstants.BEBOP_TINYMCE_EDITOR;
 
-    @Setting
+    @Setting(
+        descKey = "dhtmlEditorSrcFile.desc",
+        labelKey = "dhtmlEditorSrcFile.label"
+    )
 //    private String dhtmlEditorSrcFile = "/ccm-editor/ccm-editor-loader.js";
     private String dhtmlEditorSrcFile = "/webjars/tinymce/4.8.2/tinymce.js";
 
-    @Setting
+    @Setting(
+        descKey = "showClassName.desc",
+        labelKey = "showClassName.label"
+    )
     private Boolean showClassName = false;
 
     public static BebopConfig getConfig() {

ccm-core/src/main/java/com/arsdigita/dispatcher/DispatcherConfig.java

@@ -28,19 +28,35 @@ import org.libreccm.configuration.Setting;
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-@Configuration
+@Configuration(
+    descBundle = "com.arsdigita.dispatcher.DispatcherConfig",
+    descKey = "description",
+    titleKey = "title"
+)
 public final class DispatcherConfig {
 
-    @Setting
+    @Setting(
+        descKey = "cachingActive.desc",
+        labelKey = "cachingActive.label"
+    )
     private Boolean cachingActive = true;
 
-    @Setting
+    @Setting(
+        descKey = "defaultExpiry.desc",
+        labelKey = "defaultExpiry.label"
+    )
     private Integer defaultExpiry = 259200;
 
-    @Setting
+    @Setting(
+        descKey = "staticUrlPrefix.desc",
+        labelKey = "statusUrlPrefix.label"
+    )
     private String staticUrlPrefix = "/STATICII/";
 
-    @Setting
+    @Setting(
+        descKey = "defaultPageClass.desc",
+        labelKey = "defaultPageClass.label"
+    )
     private String defaultPageClass = "com.arsdigita.bebop.Page";
 
     public static DispatcherConfig getConfig() {

ccm-core/src/main/java/com/arsdigita/ui/admin/categories/DomainForm.java

@@ -35,6 +35,8 @@ import org.libreccm.categorization.DomainManager;
 import org.libreccm.categorization.DomainRepository;
 import org.libreccm.cdi.utils.CdiUtil;
 
+import java.time.LocalDate;
+
 import static com.arsdigita.ui.admin.AdminUiConstants.*;
 
 /**
@@ -187,7 +189,8 @@ class DomainForm extends Form {
                 }
                 final String versionData = data.getString(VERSION);
                 final java.util.Date releasedData = (java.util.Date) data.get(
-                    RELEASED);
+                    RELEASED
+                );
                 final String rootCategoryNameData = data.getString(
                     ROOT_CATEGORY_NAME);
 
@@ -207,7 +210,7 @@ class DomainForm extends Form {
                 domain.setDomainKey(domainKeyData);
                 domain.setUri(domainUriData);
                 domain.setVersion(versionData);
-                domain.setReleased(releasedData);
+                domain.setReleased(LocalDate.from(releasedData.toInstant()));
 
                 domainRepository.save(domain);
             }

ccm-core/src/main/java/org/libreccm/api/ApiConstants.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.api;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public final class ApiConstants {
+
+    private ApiConstants() {
+        // Nothing
+    }
+
+    public static final String IDENTIFIER_PREFIX_ID = "ID-";
+
+    public static final String IDENTIFIER_PREFIX_UUID = "UUID-";
+
+}

ccm-core/src/main/java/org/libreccm/api/Identifier.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.api;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class Identifier {
+
+    private final IdentifierType type;
+
+    private final String identifier;
+
+    protected Identifier(
+        final IdentifierType type, final String identifier
+    ) {
+        this.type = type;
+        this.identifier = identifier;
+    }
+
+    public IdentifierType getType() {
+        return type;
+    }
+
+    public String getIdentifier() {
+        return identifier;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/api/IdentifierParser.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.api;
+
+import java.util.Objects;
+
+import javax.enterprise.context.Dependent;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@Dependent
+public class IdentifierParser {
+
+    public Identifier parseIdentifier(final String identifierParam) {
+        Objects.requireNonNull(identifierParam, "identifier param is null.");
+
+        if (identifierParam.startsWith(ApiConstants.IDENTIFIER_PREFIX_ID)) {
+            final String identifier = identifierParam
+                .substring(ApiConstants.IDENTIFIER_PREFIX_ID.length());
+            return new Identifier(IdentifierType.ID, identifier);
+        } else if (identifierParam.startsWith(
+            ApiConstants.IDENTIFIER_PREFIX_UUID)) {
+            final String identifier = identifierParam
+                .substring(ApiConstants.IDENTIFIER_PREFIX_UUID.length());
+            return new Identifier(IdentifierType.UUID, identifier);
+        } else {
+            return new Identifier(
+                IdentifierType.PROPERTY, identifierParam
+            );
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/api/IdentifierType.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.api;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public enum IdentifierType {
+    ID,
+    UUID,
+    PROPERTY
+}

ccm-core/src/main/java/org/libreccm/categorization/Categorization.java

@@ -54,6 +54,11 @@ import javax.persistence.Table;
 @Entity
 @Table(name = "CATEGORIZATIONS", schema = DB_SCHEMA)
 @NamedQueries({
+    @NamedQuery(
+        name = "Categorization.findById",
+        query
+        = "SELECT c FROM Categorization c WHERE c.categorizationId = :categorizationId"
+    ),
     @NamedQuery(
         name = "Categorization.findByUuid",
         query = "SELECT c FROM Categorization c WHERE c.uuid = :uuid"
@@ -62,36 +67,31 @@ import javax.persistence.Table;
         name = "Categorization.find",
         query = "SELECT c FROM Categorization c "
                     + "WHERE c.category = :category "
-                    + "AND c.categorizedObject = :object")
+                    + "AND c.categorizedObject = :object"),
-    ,
     @NamedQuery(
         name = "Categorization.isAssignedTo",
         query = "SELECT (CASE WHEN COUNT(c) > 0 THEN true ELSE false END) "
                     + "FROM Categorization c "
                     + "WHERE c.category = :category "
-                    + "AND c.categorizedObject = :object")
+                    + "AND c.categorizedObject = :object"),
-    ,
     @NamedQuery(
         name = "Categorization.isAssignedToWithType",
         query = "SELECT (CASE WHEN COUNT(c) > 0 THEN true ELSE false END) "
                     + "FROM Categorization c "
                     + "WHERE c.category = :category "
                     + "AND c.categorizedObject = :object "
-                    + "AND c.type = :type")
+                    + "AND c.type = :type"),
-    ,
     @NamedQuery(
         name = "Categorization.findIndexObject",
         query = "SELECT c.categorizedObject FROM Categorization c "
                     + "WHERE c.category = :category "
-                    + "AND c.indexObject = TRUE")
+                    + "AND c.indexObject = TRUE"),
-    ,
     @NamedQuery(
         name = "Categorization.findIndexObjectCategorization",
         query = "SELECT c FROM Categorization c "
                     + "WHERE c.category = :category "
                     + "AND c.indexObject = TRUE"
-    )
+    ),
-    ,
     @NamedQuery(
         name = "Categorization.hasIndexObject",
         query = "SELECT (CASE WHEN COUNT(c.categorizedObject) > 0 THEN true "

ccm-core/src/main/java/org/libreccm/categorization/CategorizationImExporter.java

@@ -23,12 +23,15 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
 import javax.enterprise.inject.Instance;
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
+import javax.persistence.NoResultException;
+import javax.persistence.TypedQuery;
 import javax.transaction.Transactional;
 
 /**
@@ -48,14 +51,12 @@ public class CategorizationImExporter
     private Instance<CategorizationImExporterDependenciesProvider> dependenciesProviders;
 
     @Override
-    protected Class<Categorization> getEntityClass() {
+    public Class<Categorization> getEntityClass() {
-
         return Categorization.class;
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         final Set<Class<? extends Exportable>> entities = new HashSet<>();
         entities.add(Category.class);
 
@@ -69,8 +70,27 @@ public class CategorizationImExporter
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Categorization entity) {
-
         entityManager.persist(entity);
     }
 
+    @Override
+    protected Categorization reloadEntity(final Categorization entity) {
+        try {
+            return entityManager.createNamedQuery(
+                "Categorization.findById",
+                Categorization.class
+            ).setParameter(
+                "categorizationId",
+                Objects.requireNonNull(entity).getCategorizationId()
+            ).getSingleResult();
+        } catch (NoResultException ex) {
+            throw new IllegalArgumentException(
+                String.format(
+                    "Categorization entity %s was not found in the database.",
+                    Objects.toString(entity)
+                )
+            );
+        }
+    }
+
 }

ccm-core/src/main/java/org/libreccm/categorization/CategoryImExporter.java

@@ -23,6 +23,7 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
@@ -42,14 +43,12 @@ public class CategoryImExporter extends AbstractEntityImExporter<Category> {
     private CategoryRepository categoryRepository;
 
     @Override
-    protected Class<Category> getEntityClass() {
+    public Class<Category> getEntityClass() {
-
         return Category.class;
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         final Set<Class<? extends Exportable>> entities = new HashSet<>();
         entities.add(Domain.class);
 
@@ -59,8 +58,21 @@ public class CategoryImExporter extends AbstractEntityImExporter<Category> {
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Category entity) {
-
         categoryRepository.save(entity);
     }
 
+    @Override
+    protected Category reloadEntity(final Category entity) {
+        return categoryRepository
+            .findById(Objects.requireNonNull(entity).getObjectId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Category entity %s does not exist in the database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+
 }

ccm-core/src/main/java/org/libreccm/categorization/CategoryManager.java

@@ -872,7 +872,7 @@ public class CategoryManager implements Serializable {
      * The first entry in the list is the root category, the last entry is the
      * provided category.
      *
-     * @param ofCategory The category for whic the tree is generated.
+     * @param ofCategory The category for which the tree is generated.
      *
      * @return A list of a categories in the path of the provided category.
      */

ccm-core/src/main/java/org/libreccm/categorization/Domain.java

@@ -42,9 +42,10 @@ import static org.libreccm.core.CoreConstants.DB_SCHEMA;
 
 import org.libreccm.imexport.Exportable;
 
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.Date;
 import java.util.List;
 import java.util.Objects;
 
@@ -63,8 +64,6 @@ import javax.persistence.NamedQuery;
 import javax.persistence.NamedSubgraph;
 import javax.persistence.OneToMany;
 import javax.persistence.Table;
-import javax.persistence.Temporal;
-import javax.persistence.TemporalType;
 import javax.validation.constraints.NotBlank;
 
 /**
@@ -83,14 +82,26 @@ import javax.validation.constraints.NotBlank;
 @Entity
 @Table(name = "CATEGORY_DOMAINS", schema = DB_SCHEMA)
 @NamedQueries({
-    @NamedQuery(name = "Domain.findByKey",
+    @NamedQuery(
-                query = "SELECT d FROM Domain d WHERE d.domainKey = :key"),
+        name = "Domain.findByKey",
-    @NamedQuery(name = "Domain.findByUri",
+        query = "SELECT d FROM Domain d WHERE d.domainKey = :key"
-                query = "SELECT d FROM Domain d WHERE d.uri = :uri"),
+    ),
-    @NamedQuery(name = "Domain.findByUuid",
+    @NamedQuery(
-                query = "SELECT d FROM Domain d WHERE d.uuid = :uuid"),
+        name = "Domain.findByUri",
-    @NamedQuery(name = "Domain.findAll",
+        query = "SELECT d FROM Domain d WHERE d.uri = :uri"
-                query = "SELECT d FROM Domain d ORDER BY d.domainKey"),
+    ),
+    @NamedQuery(
+        name = "Domain.findByUuid",
+        query = "SELECT d FROM Domain d WHERE d.uuid = :uuid"
+    ),
+    @NamedQuery(
+        name = "Domain.findByRootCategory",
+        query = "SELECT d FROM Domain d WHERE d.root = :root"
+    ),
+    @NamedQuery(
+        name = "Domain.findAll",
+        query = "SELECT d FROM Domain d ORDER BY d.domainKey"
+    ),
     @NamedQuery(
         name = "Domain.search",
         query
@@ -188,7 +199,6 @@ public class Domain extends CcmObject implements Serializable, Exportable {
      * A version string for the {@code Domain}.
      */
     @Column(name = "VERSION", nullable = true)
-    @NotBlank
     @XmlElement(name = "version", namespace = CAT_XML_NS)
     private String version;
 
@@ -196,9 +206,8 @@ public class Domain extends CcmObject implements Serializable, Exportable {
      * A timestamp for the release date of the {@code Domain}.
      */
     @Column(name = "RELEASED")
-    @Temporal(TemporalType.TIMESTAMP)
     @XmlElement(name = "released", namespace = CAT_XML_NS)
-    private Date released;
+    private LocalDate released;
 
     /**
      * The root category of the domain.
@@ -267,20 +276,12 @@ public class Domain extends CcmObject implements Serializable, Exportable {
         this.version = version;
     }
 
-    public Date getReleased() {
+    public LocalDate getReleased() {
-        if (released == null) {
+        return released;
-            return null;
-        } else {
-            return new Date(released.getTime());
-        }
     }
 
-    public void setReleased(final Date released) {
+    public void setReleased(final LocalDate released) {
-        if (released == null) {
+        this.released = released;
-            this.released = null;
-        } else {
-            this.released = new Date(released.getTime());
-        }
     }
 
     public Category getRoot() {
@@ -399,18 +400,24 @@ public class Domain extends CcmObject implements Serializable, Exportable {
 
     @Override
     public String toString(final String data) {
+        final String releasedStr;
+        if (released == null) {
+            releasedStr = "";
+        } else {
+            releasedStr = DateTimeFormatter.ISO_DATE.format(released);
+        }
         return String.format(
             ", domainKey = \"%s\", "
                 + "uri = \"%s\", "
                 + "title = \"%s\", "
                 + "version = \"%s\", "
-                + "released = %tF %<tT, "
+                + "released = %s, "
                 + "root = \"%s\"%s",
             domainKey,
             Objects.toString(uri),
             Objects.toString(title),
             version,
-            released,
+            releasedStr,
             Objects.toString(root),
             data
         );

ccm-core/src/main/java/org/libreccm/categorization/DomainImExporter.java

@@ -23,6 +23,7 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.Collections;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
@@ -41,7 +42,7 @@ public class DomainImExporter extends AbstractEntityImExporter<Domain> {
     private DomainRepository domainRepository;
 
     @Override
-    protected Class<Domain> getEntityClass() {
+    public Class<Domain> getEntityClass() {
 
         return Domain.class;
     }
@@ -58,6 +59,18 @@ public class DomainImExporter extends AbstractEntityImExporter<Domain> {
         return Collections.emptySet();
     }
 
-    
+    @Override
+    protected Domain reloadEntity(final Domain entity) {
+        return domainRepository
+            .findById(Objects.requireNonNull(entity).getObjectId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Domain entity %s was not found in the database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
 
 }

ccm-core/src/main/java/org/libreccm/categorization/DomainManager.java

@@ -119,6 +119,41 @@ public class DomainManager implements Serializable {
         domainRepo.save(domain);
     }
 
+    /**
+     * Adds a {@code CcmApplication} to the owners of a {@link Domain}.If the
+ provided {@code CcmApplication} is already an owner of the provided
+    {@code Domain} the method does nothing.
+     *
+     * @param application The {@code CcmApplication} to add to the owners of the
+     *                    {@code Domain}.
+     * @param domain      The {@code Domain} to which owners the
+     *                    {@code CcmApplication is added}.
+     * @param context Context for the mapping
+     */
+    @AuthorizationRequired
+    @RequiresPrivilege(CategorizationConstants.PRIVILEGE_MANAGE_DOMAINS)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public void addDomainOwner(
+        final CcmApplication application,
+        final Domain domain,
+        final String context
+    ) {
+        final DomainOwnership ownership = new DomainOwnership();
+        ownership.setUuid(UUID.randomUUID().toString());
+        ownership.setDomain(domain);
+        ownership.setOwner(application);
+        ownership.setContext(context);
+        ownership.setOwnerOrder(domain.getOwners().size() + 1);
+        ownership.setDomainOrder(application.getDomains().size() + 1);
+
+        application.addDomain(ownership);
+        domain.addOwner(ownership);
+
+        entityManager.persist(ownership);
+        applicationRepo.save(application);
+        domainRepo.save(domain);
+    }
+
     /**
      * Removes a {@code CcmApplication} from the owners of a {@code Domain}. If
      * the provided {@code CcmApplication} is not an owner of the provided

ccm-core/src/main/java/org/libreccm/categorization/DomainOwnership.java

@@ -54,11 +54,15 @@ import javax.xml.bind.annotation.XmlElement;
 @Entity
 @Table(name = "DOMAIN_OWNERSHIPS", schema = DB_SCHEMA)
 @NamedQueries({
+    @NamedQuery(
+        name = "DomainOwnership.findById",
+        query
+        = "SELECT o FROM DomainOwnership o WHERE o.ownershipId = :ownershipId"
+    ),
     @NamedQuery(
         name = "DomainOwnership.findByUuid",
         query = "SELECT o FROM DomainOwnership o WHERE o.uuid = :uuid"
-    )
+    ),
-    ,
     @NamedQuery(
         name = "DomainOwnership.findByOwnerAndDomain",
         query = "SELECT o FROM DomainOwnership o "

ccm-core/src/main/java/org/libreccm/categorization/DomainOwnershipImExporter.java

@@ -24,11 +24,13 @@ import org.libreccm.imexport.Processes;
 import org.libreccm.web.CcmApplication;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
+import javax.persistence.NoResultException;
 import javax.transaction.Transactional;
 
 /**
@@ -46,21 +48,18 @@ public class DomainOwnershipImExporter
     private EntityManager entityManager;
 
     @Override
-    protected Class<DomainOwnership> getEntityClass() {
+    public Class<DomainOwnership> getEntityClass() {
-
         return DomainOwnership.class;
     }
 
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final DomainOwnership entity) {
-
         entityManager.persist(entity);
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         final Set<Class<? extends Exportable>> classes = new HashSet<>();
         classes.add(CcmApplication.class);
         classes.add(Domain.class);
@@ -68,4 +67,26 @@ public class DomainOwnershipImExporter
         return classes;
     }
 
+    @Override
+    protected DomainOwnership reloadEntity(final DomainOwnership entity) {
+        try {
+            return entityManager
+                .createNamedQuery(
+                    "DomainOwnership.findById",
+                    DomainOwnership.class
+                )
+                .setParameter(
+                    "ownershipId",
+                    Objects.requireNonNull(entity.getOwnershipId())
+                ).getSingleResult();
+        } catch (NoResultException ex) {
+            throw new IllegalArgumentException(
+                String.format(
+                    "DomainOwnership entity %s not found in database.",
+                    Objects.toString(entity)
+                )
+            );
+        }
+    }
+
 }

ccm-core/src/main/java/org/libreccm/categorization/DomainRepository.java

@@ -87,6 +87,7 @@ public class DomainRepository extends AbstractEntityRepository<Long, Domain> {
      * @return The {@code Domain} identified by {@code domainKey} or
      *         {@code null} if there is no such {@code Domain}.
      */
+    @Transactional(Transactional.TxType.REQUIRED)
     public Optional<Domain> findByDomainKey(final String domainKey) {
         final TypedQuery<Domain> query = getEntityManager()
             .createNamedQuery("Domain.findByKey", Domain.class);
@@ -111,6 +112,7 @@ public class DomainRepository extends AbstractEntityRepository<Long, Domain> {
      * @return The {@code Domain} identified by the provided URI or {@code null}
      *         if there is so such {@code Domain}.
      */
+    @Transactional(Transactional.TxType.REQUIRED)
     public Domain findByUri(final URI uri) {
         final TypedQuery<Domain> query = getEntityManager()
             .createNamedQuery("Domain.findByUri", Domain.class);
@@ -126,18 +128,37 @@ public class DomainRepository extends AbstractEntityRepository<Long, Domain> {
      *
      * @return An optional either with the found item or empty
      */
+    @Transactional(Transactional.TxType.REQUIRED)
     public Optional<Domain> findByUuid(final String uuid) {
-        final TypedQuery<Domain> query = getEntityManager()
-            .createNamedQuery("Domain.findByUuid", Domain.class);
-        query.setParameter("uuid", uuid);
-
         try {
-            return Optional.of(query.getSingleResult());
+            return Optional.of(
+                getEntityManager()
+                    .createNamedQuery("Domain.findByUuid", Domain.class)
+                    .setParameter("uuid", uuid)
+                    .getSingleResult()
+            );
         } catch (NoResultException ex) {
             return Optional.empty();
         }
     }
 
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Domain> findByRootCategory(final Category rootCategory) {
+        try {
+            return Optional.of(
+                getEntityManager()
+                    .createNamedQuery(
+                        "Domain.findByRootCategory", Domain.class
+                    )
+                    .setParameter("root", rootCategory)
+                    .getSingleResult()
+            );
+        } catch (NoResultException ex) {
+            return Optional.empty();
+        }
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
     public List<Domain> search(final String term) {
         final TypedQuery<Domain> query = getEntityManager()
             .createNamedQuery("Domain.search", Domain.class);

ccm-core/src/main/java/org/libreccm/configuration/AbstractSetting.java

@@ -18,15 +18,27 @@
  */
 package org.libreccm.configuration;
 
-import org.hibernate.validator.constraints.NotBlank;
 
-import javax.persistence.*;
 import javax.validation.constraints.Pattern;
+
 import java.io.Serializable;
 import java.util.Objects;
 
 import static org.libreccm.core.CoreConstants.DB_SCHEMA;
 
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Inheritance;
+import javax.persistence.InheritanceType;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
+import javax.persistence.Table;
+import javax.persistence.UniqueConstraint;
+import javax.validation.constraints.NotBlank;
+
 /**
  * Abstract base class for all settings.
  *

ccm-core/src/main/java/org/libreccm/configuration/ConfigurationInfo.java

@@ -21,7 +21,15 @@ package org.libreccm.configuration;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import java.util.*;
+import java.util.Collections;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.NavigableMap;
+import java.util.Objects;
+import java.util.ResourceBundle;
+import java.util.TreeMap;
+
+
 
 /**
  * Describes a configuration. Useful for generating user interfaces.

ccm-core/src/main/java/org/libreccm/configuration/SettingManager.java

@@ -22,18 +22,25 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.util.Strings;
 import org.libreccm.core.CoreConstants;
+import org.libreccm.l10n.LocalizedString;
 import org.libreccm.security.AuthorizationRequired;
 import org.libreccm.security.RequiresPrivilege;
 
+import java.lang.reflect.Constructor;
+
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
 import javax.persistence.TypedQuery;
 import javax.transaction.Transactional;
+
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
 
 /**
  *
@@ -106,7 +113,7 @@ public class SettingManager {
     /**
      * Create a {@link SettingInfo} instance for a setting.
      *
-     * @param configuration The configuration class to which the settings
+     * @param configurationClass The configuration class to which the settings
      *                           belongs.
      * @param name               The name of the setting for which the
      *                           {@link SettingInfo} is generated.
@@ -117,28 +124,29 @@ public class SettingManager {
                        "PMD.CyclomaticComplexity",
                        "PMD.StandardCyclomaticComplexity"})
     public SettingInfo getSettingInfo(
-        final Class<?> configuration,
+        final Class<?> configurationClass,
-        final String name) {
+        final String name
-        if (configuration == null) {
+    ) {
+        if (configurationClass == null) {
             throw new IllegalArgumentException("Configuration can't be null");
         }
 
-        if (configuration.getAnnotation(Configuration.class) == null) {
+        if (configurationClass.getAnnotation(Configuration.class) == null) {
             throw new IllegalArgumentException(String.format(
                 "The class \"%s\" of the provided object is not annotated "
                     + "with \"%s\".",
-                configuration.getClass().getName(),
+                configurationClass.getClass().getName(),
                 Configuration.class.getName()));
         }
 
         final Field field;
         try {
-            field = configuration.getDeclaredField(name);
+            field = configurationClass.getDeclaredField(name);
         } catch (SecurityException | NoSuchFieldException ex) {
             LOGGER.warn(String.format(
                 "Failed to generate SettingInfo for field \"%s\" of "
                     + "configuration \"%s\". Ignoring field.",
-                configuration.getClass().getName(),
+                configurationClass.getClass().getName(),
                 name),
                         ex);
             return null;
@@ -163,23 +171,61 @@ public class SettingManager {
         settingInfo.setValueType(field.getType().getName());
 
         try {
-            final Object conf = configuration.newInstance();
+            final Constructor<?> constructor = configurationClass
-            settingInfo.setDefaultValue(Objects.toString(field.get(conf)));
+                .getConstructor();
-        } catch (InstantiationException | IllegalAccessException ex) {
+            final Object configuration = constructor.newInstance();
+            final Object defaultValueObj = field.get(configuration);
+            final String defaultValue;
+            if (defaultValueObj instanceof List) {
+                @SuppressWarnings("unchecked")
+                final List<String> defaultValueList
+                    = (List<String>) defaultValueObj;
+                defaultValue = defaultValueList
+                    .stream()
+                    .collect(Collectors.joining("\n"));
+            } else if (defaultValueObj instanceof LocalizedString) {
+                final LocalizedString defaultValueLstr
+                    = (LocalizedString) defaultValueObj;
+                defaultValue = defaultValueLstr
+                    .getValues()
+                    .entrySet()
+                    .stream()
+                    .map(
+                        entry -> String.format(
+                            "%s: %s",
+                            entry.getKey().toString(), entry.getValue()
+                        )
+                    )
+                    .collect(Collectors.joining("\n"));
+            } else if (defaultValueObj instanceof Set) {
+                @SuppressWarnings("unchecked")
+                final Set<String> defaultValueSet
+                    = (Set<String>) defaultValueObj;
+                defaultValue = defaultValueSet
+                    .stream()
+                    .collect(Collectors.joining("\n"));
+            } else {
+                defaultValue = Objects.toString(defaultValueObj);
+            }
+            settingInfo.setDefaultValue(defaultValue);
+        } catch (NoSuchMethodException
+                 | InstantiationException
+                 | InvocationTargetException
+                 | IllegalAccessException ex) {
             LOGGER.warn(String.format("Failed to create instance of \"%s\" to "
                                           + "get default values.",
-                                      configuration.getName()),
+                                      configurationClass.getName()),
                         ex);
         }
 
-        settingInfo.setConfClass(configuration.getName());
+        settingInfo.setConfClass(configurationClass.getName());
-        settingInfo.setDescBundle(getDescBundle(configuration));
+        settingInfo.setDescBundle(getDescBundle(configurationClass));
 
         if (Strings.isBlank(settingAnnotation.labelKey())) {
             settingInfo.setLabelKey(String.join(".", field.getName(),
                                                 "label"));
         } else {
-            settingInfo.setLabelKey(name);
+            settingInfo.setLabelKey(settingAnnotation.labelKey());
         }
 
         if (Strings.isBlank(settingAnnotation.descKey())) {
@@ -227,6 +273,61 @@ public class SettingManager {
         }
     }
 
+    public Object getDefaultValue(
+        final Class<?> configurationClass,
+        final String settingName
+    ) {
+        if (configurationClass == null) {
+            throw new IllegalArgumentException("Configuration can't be null");
+        }
+
+        if (configurationClass.getAnnotation(Configuration.class) == null) {
+            throw new IllegalArgumentException(String.format(
+                "The class \"%s\" of the provided object is not annotated "
+                    + "with \"%s\".",
+                configurationClass.getClass().getName(),
+                Configuration.class.getName()));
+        }
+
+        final Field field;
+        try {
+            field = configurationClass.getDeclaredField(settingName);
+        } catch (SecurityException | NoSuchFieldException ex) {
+            LOGGER.warn(String.format(
+                "Failed to generate SettingInfo for field \"%s\" of "
+                    + "configuration \"%s\". Ignoring field.",
+                configurationClass.getClass().getName(),
+                settingName),
+                        ex);
+            return null;
+        }
+
+        //Make the field accessible even if it has a private modifier
+        field.setAccessible(true);
+
+        if (field.getAnnotation(Setting.class) == null) {
+            return null;
+        }
+
+        try {
+            final Constructor<?> constructor = configurationClass
+                .getConstructor();
+            final Object configuration = constructor.newInstance();
+            final Object defaultValueObj = field.get(configuration);
+
+            return defaultValueObj;
+        } catch (NoSuchMethodException
+                 | IllegalAccessException
+                 | InstantiationException
+                 | InvocationTargetException ex) {
+            LOGGER.warn(String.format("Failed to create instance of \"%s\" to "
+                                          + "get default values.",
+                                      configurationClass.getName()),
+                        ex);
+            return null;
+        }
+    }
+
     /**
      * Low level method of saving a setting.
      *

ccm-core/src/main/java/org/libreccm/core/CcmCore.java

@@ -47,8 +47,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
 
-
-
 /**
  * Describes the {@code ccm-core} module.
  *
@@ -59,22 +57,19 @@ import java.util.Properties;
                      descBundle = "com.arsdigita.ui.login.LoginResources",
                      singleton = true,
                      creator = LoginApplicationCreator.class,
-                     servlet = LoginServlet.class)
+                     servlet = LoginServlet.class),
-    ,
     @ApplicationType(name = AdminUiConstants.ADMIN_APP_TYPE,
                      descBundle = "com.arsdigita.ui.admin.AdminResources",
                      singleton = true,
                      creator = AdminApplicationCreator.class,
-                     servlet = AdminServlet.class)
+                     servlet = AdminServlet.class),
-    ,
     @ApplicationType(name = "org.libreccm.ui.admin.AdminFaces",
                      descBundle = "com.arsdigita.ui.admin.AdminResources",
                      singleton = true,
                      creator = AdminJsfApplicationCreator.class,
-                     servletPath = "/admin-jsf/admin.xhtml")},
+                     servletPath = "/admin-jsf/admin.xhtml")
-        pageModelComponentModels = {
-            
     },
+        pageModelComponentModels = {},
         configurations = {
             com.arsdigita.bebop.BebopConfig.class,
             com.arsdigita.dispatcher.DispatcherConfig.class,

ccm-core/src/main/java/org/libreccm/core/EmailAddress.java

@@ -18,8 +18,6 @@
  */
 package org.libreccm.core;
 
-import org.hibernate.validator.constraints.Email;
-import org.hibernate.validator.constraints.NotBlank;
 
 import javax.persistence.Column;
 import javax.persistence.Embeddable;
@@ -33,6 +31,8 @@ import static org.libreccm.core.CoreConstants.CORE_XML_NS;
 
 import javax.json.Json;
 import javax.json.JsonObjectBuilder;
+import javax.validation.constraints.Email;
+import javax.validation.constraints.NotBlank;
 
 /**
  * An embeddable entity for storing email addresses.

ccm-core/src/main/java/org/libreccm/core/ResourceTypeImExporter.java

@@ -23,6 +23,7 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.Collections;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.inject.Inject;
@@ -39,23 +40,37 @@ public class ResourceTypeImExporter
     private ResourceTypeRepository repository;
 
     @Override
-    protected Class<ResourceType> getEntityClass() {
+    public Class<ResourceType> getEntityClass() {
-        
         return ResourceType.class;
     }
 
     @Override
     protected void saveImportedEntity(final ResourceType entity) {
-        
         repository.save(entity);
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-        
         return Collections.emptySet();
     }
 
+    @Override
+    protected ResourceType reloadEntity(final ResourceType entity) {
+        return repository
+            .findById(
+                Objects.requireNonNull(entity).getResourceTypeId()
+            )
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "The provided ResourceType %s was not found in the "
+                            + "database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+    
     
     
 }

ccm-core/src/main/java/org/libreccm/files/CcmFiles.java

@@ -172,9 +172,10 @@ public class CcmFiles {
             if (adapter.isConfigured()) {
                 return adapter;
             } else {
-                throw new UnexpectedErrorException(
+                throw new CcmFilesNotConfiguredException(
                     "Only the default FileSystemAdapter is available but is "
-                        + "not correctly configured.");
+                        + "not correctly configured."
+                );
             }
         }
     }
@@ -196,7 +197,9 @@ public class CcmFiles {
         final String dataPath = filesConf.getDataPath();
 
         if (dataPath == null || dataPath.trim().isEmpty()) {
-            throw new UnexpectedErrorException("dataPath is not configured.");
+            throw new CcmFilesNotConfiguredException(
+                "dataPath is not configured."
+            );
         }
 
         if (dataPath.endsWith("/")) {

ccm-core/src/main/java/org/libreccm/files/CcmFilesNotConfiguredException.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+
+package org.libreccm.files;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class CcmFilesNotConfiguredException extends RuntimeException {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Creates a new instance of <code>CcmFilesNotConfiguredException</code> without detail message.
+     */
+    public CcmFilesNotConfiguredException() {
+        super();
+    }
+
+
+    /**
+     * Constructs an instance of <code>CcmFilesNotConfiguredException</code> with the specified detail message.
+     *
+     * @param msg The detail message.
+     */
+    public CcmFilesNotConfiguredException(final String msg) {
+        super(msg);
+    }
+
+    /**
+      * Constructs an instance of <code>CcmFilesNotConfiguredException</code> which wraps the 
+      * specified exception.
+      *
+      * @param exception The exception to wrap.
+      */
+    public CcmFilesNotConfiguredException(final Exception exception) {
+        super(exception);
+    }
+
+    /**
+      * Constructs an instance of <code>CcmFilesNotConfiguredException</code> with the specified message which also wraps the 
+      * specified exception.
+      *
+      * @param msg The detail message.
+      * @param exception The exception to wrap.
+      */
+    public CcmFilesNotConfiguredException(final String msg, final Exception exception) {
+        super(msg, exception);
+    }
+}

ccm-core/src/main/java/org/libreccm/imexport/AbstractEntityImExporter.java

@@ -53,7 +53,7 @@ public abstract class AbstractEntityImExporter<T extends Exportable> {
      *
      * @return The Entity class which is handled by the implementation.
      */
-    protected abstract Class<T> getEntityClass();
+    public abstract Class<T> getEntityClass();
 
     /**
      * A set of entities which should be processed before this implementation is
@@ -62,7 +62,6 @@ public abstract class AbstractEntityImExporter<T extends Exportable> {
      * containers usually create a {@link java.lang.reflect.Proxy} class and
      * there is no portable way to unproxy a class.
      *
-     *
      * @return A {@link Set} of exportable entity classes which should be
      *         processed before the entities which are processed by this
      *         implementation. If the implementation has no dependencies an
@@ -72,7 +71,6 @@ public abstract class AbstractEntityImExporter<T extends Exportable> {
 
     @Transactional(Transactional.TxType.REQUIRED)
     public T importEntity(final String data) throws ImportExpection {
-
         try {
             final T entity = objectMapper.readValue(data, getEntityClass());
             saveImportedEntity(entity);
@@ -80,14 +78,26 @@ public abstract class AbstractEntityImExporter<T extends Exportable> {
         } catch (IOException ex) {
             throw new ImportExpection(ex);
         }
-
     }
 
+    protected abstract void saveImportedEntity(T entity);
+
+    /**
+     * Export an entity (as JSON). There should be no need to overwrite this
+     * method.
+     *
+     * @param entity The entity to export.
+     *
+     * @return The entity as JSON
+     *
+     * @throws ExportException If an error occurs.
+     */
     @Transactional(Transactional.TxType.REQUIRED)
     public String exportEntity(final Exportable entity) throws ExportException {
-
+        @SuppressWarnings("unchecked")
+        final T export = reloadEntity((T) entity);
         try {
-            return objectMapper.writeValueAsString(entity);
+            return objectMapper.writeValueAsString(export);
         } catch (JsonProcessingException ex) {
             throw new ExportException(String.format(
                 "Failed to export entity \"%s\" of type \"%s\".",
@@ -95,9 +105,17 @@ public abstract class AbstractEntityImExporter<T extends Exportable> {
                 getEntityClass().getName()),
                                       ex);
         }
-
     }
 
-    protected abstract void saveImportedEntity(T entity);
+    /**
+     * Reloads the entity to export. Entities become detacted for several
+     * reasons before they are passed to the null     {@link #exportEntity(org.libreccm.imexport.Exportable) method. The 
+     * implementation of this should reload the passed entity.
+     *
+     * @param entity The entity to reload.
+     *
+     * @return The reloaded entity
+     */
+    protected abstract T reloadEntity(final T entity);
 
 }

ccm-core/src/main/java/org/libreccm/imexport/EntityImExporterTreeManager.java

@@ -254,16 +254,12 @@ final class EntityImExporterTreeManager {
 
         //Check if the nodes list has an entry for the required module.
         if (!nodes.containsKey(requiredClass.getName())) {
-
             LOGGER.fatal("Required EntityImExporter for \"{}\" no found.",
                          requiredClass.getName());
             throw new DependencyException(String.format(
                 "EntityImExporter for type \"%s\" depends on type \"%s\" "
                     + "but no EntityImExporter for type \"%s\" is available.",
-                node
+                node.getEntityImExporter().getEntityClass(),
-                    .getEntityImExporter()
-                    .getClass()
-                    .getAnnotation(Processes.class).value().getName(),
                 requiredClass.getName(),
                 requiredClass.getName()));
         }

ccm-core/src/main/java/org/libreccm/imexport/EntityImExporterTreeNode.java

@@ -22,13 +22,14 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
+import java.util.stream.Collectors;
 
 /**
  * A node in the dependency tree managed by {@link EntityImExporterTreeManager}.
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-final class EntityImExporterTreeNode {
+public final class EntityImExporterTreeNode {
 
     private AbstractEntityImExporter<?> entityImExporter;
 
@@ -36,8 +37,7 @@ final class EntityImExporterTreeNode {
 
     private List<EntityImExporterTreeNode> dependsOn;
 
-    public EntityImExporterTreeNode() {
+    protected EntityImExporterTreeNode() {
-        
         super();
 
         dependentImExporters = new ArrayList<>();
@@ -105,9 +105,10 @@ final class EntityImExporterTreeNode {
     @Override
     public int hashCode() {
         int hash = 7;
-        hash = 47 
+        hash = 47 * hash
-               * hash 
+                   + Objects.hashCode(
-               + Objects.hashCode(this.entityImExporter.getClass().getName());
+                this.entityImExporter.getClass().getName()
+            );
         return hash;
     }
 
@@ -128,6 +129,29 @@ final class EntityImExporterTreeNode {
             other.getEntityImExporter().getClass().getName());
     }
 
-    
+    @Override
+    public String toString() {
+        return String.format(
+            "%s{ "
+                + "entityImExporter: %s, "
+                + "dependentImExporters: [%s], "
+                + "dependsOn: [%s]"
+                + " }",
+            super.toString(),
+            entityImExporter.getEntityClass().toString(),
+            dependentImExporters
+                .stream()
+                .map(EntityImExporterTreeNode::getEntityImExporter)
+                .map(AbstractEntityImExporter::getEntityClass)
+                .map(Class::getName)
+                .collect(Collectors.joining(", ")),
+            dependsOn
+                .stream()
+                .map(EntityImExporterTreeNode::getEntityImExporter)
+                .map(AbstractEntityImExporter::getEntityClass)
+                .map(Class::getName)
+                .collect(Collectors.joining(", "))
+        );
+    }
 
 }

ccm-core/src/main/java/org/libreccm/imexport/ImportExport.java

@@ -38,6 +38,7 @@ import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
@@ -59,6 +60,7 @@ import javax.json.JsonObjectBuilder;
 import javax.json.JsonReader;
 import javax.json.JsonString;
 import javax.json.JsonWriter;
+import javax.transaction.Transactional;
 
 /**
  * Central service for importing and exporting entities.
@@ -75,6 +77,23 @@ public class ImportExport {
     @Any
     private Instance<AbstractEntityImExporter<?>> imExporters;
 
+    public List<EntityImExporterTreeNode> getExportableEntityTypes() {
+        try {
+            final EntityImExporterTreeManager treeManager
+                = new EntityImExporterTreeManager();
+            final List<EntityImExporterTreeNode> tree = treeManager
+                .generateTree(
+                    imExporters
+                        .stream()
+                        .collect(Collectors.toList())
+                );
+
+            return tree;
+        } catch (DependencyException ex) {
+            throw new UnexpectedErrorException(ex);
+        }
+    }
+
     /**
      * Exports the provided entities. The export will be written to a to the
      * {@code exports} directory in the CCM files directory. If {@code split} is
@@ -89,9 +108,10 @@ public class ImportExport {
      *
      * @see CcmFilesConfiguration#dataPath
      */
-    public void exportEntities(final List<Exportable> entities,
+    @Transactional(Transactional.TxType.REQUIRED)
-                               final String exportName) {
+    public void exportEntities(
-
+        final Collection<Exportable> entities, final String exportName
+    ) {
         final JsonObjectBuilder manifestBuilder = Json.createObjectBuilder();
         manifestBuilder.add("created",
                             LocalDateTime.now(ZoneId.of("UTC")).toString());
@@ -145,83 +165,12 @@ public class ImportExport {
 
         for (final Map.Entry<String, List<Exportable>> entry
                  : typeEntityMap.entrySet()) {
-
             createExportedEntities(exportName,
                                    entry.getKey(),
                                    entry.getValue());
         }
     }
 
-    @SuppressWarnings("unchecked")
-    private JsonArrayBuilder createExportedEntities(
-        final String exportName,
-        final String type,
-        final List<Exportable> entities) {
-
-        final JsonArrayBuilder filesArrayBuilder = Json.createArrayBuilder();
-
-        final Class<? extends Exportable> clazz;
-        try {
-            clazz = (Class<? extends Exportable>) Class.forName(type);
-        } catch (ClassNotFoundException ex) {
-            throw new UnexpectedErrorException(ex);
-        }
-
-        final Instance<AbstractEntityImExporter<?>> instance = imExporters
-            .select(new ProcessesLiteral(clazz));
-
-        final AbstractEntityImExporter<?> imExporter;
-        if (instance.isUnsatisfied()) {
-            throw new UnexpectedErrorException(String.format(
-                "No EntityImExporter for entity type \"%s\" available.",
-                type));
-        } else if (instance.isAmbiguous()) {
-            throw new UnexpectedErrorException(String.format(
-                "Instance reference for EntityImExporter for entity "
-                    + "type \"%s\" is ambiguous.",
-                type));
-        } else {
-            imExporter = instance.get();
-        }
-
-        for (Exportable entity : entities) {
-
-            final String filename = String.format("%s.json", entity.getUuid());
-            final OutputStream outputStream;
-            try {
-                outputStream = ccmFiles.createOutputStream(String.format(
-                    "exports/%s/%s/%s",
-                    exportName,
-                    type,
-                    filename));
-                filesArrayBuilder.add(filename);
-            } catch (FileAccessException
-                     | InsufficientPermissionsException ex) {
-                throw new UnexpectedErrorException(ex);
-            }
-
-            final String exportedEntity;
-            try {
-                exportedEntity = imExporter.exportEntity(entity);
-            } catch (ExportException ex) {
-                throw new UnexpectedErrorException(ex);
-            }
-            try (final OutputStreamWriter writer = new OutputStreamWriter(
-                outputStream, StandardCharsets.UTF_8)) {
-
-                writer.write(exportedEntity);
-
-            } catch (IOException ex) {
-                throw new UnexpectedErrorException(ex);
-            }
-//            try (JsonWriter writer = Json.createWriter(outputStream)) {
-//                writer.writeObject(exportedEntity);
-//            }
-        }
-
-        return filesArrayBuilder;
-    }
-
     /**
      * Imports all entities from the files in the {@link imports} directory
      * inside the CCM files data directory. The data to import can either be a
@@ -235,8 +184,8 @@ public class ImportExport {
      *
      * @see CcmFilesConfiguration#dataPath
      */
+    @Transactional(Transactional.TxType.REQUIRED)
     public void importEntities(final String importName) {
-
         final String importsPath = String.format("imports/%s", importName);
 
         try {
@@ -253,15 +202,15 @@ public class ImportExport {
             throw new UnexpectedErrorException(ex);
         }
 
-        final List<AbstractEntityImExporter<?>> imExportersList
-                                                    = new ArrayList<>();
-        imExporters.forEach(imExporter -> imExportersList.add(imExporter));
-
         try {
             final EntityImExporterTreeManager treeManager
                 = new EntityImExporterTreeManager();
             final List<EntityImExporterTreeNode> tree = treeManager
-                .generateTree(imExportersList);
+                .generateTree(
+                    imExporters
+                        .stream()
+                        .collect(Collectors.toList())
+                );
             final List<EntityImExporterTreeNode> orderedNodes = treeManager
                 .orderImExporters(tree);
 
@@ -339,8 +288,6 @@ public class ImportExport {
                 .lines()
                 .collect(Collectors.joining("\n"));
 
-//            final JsonReader reader = Json.createReader(inputStream);
-//            final JsonObject data = reader.readObject();
             imExporter.importEntity(data);
 
         } catch (IOException
@@ -372,6 +319,71 @@ public class ImportExport {
             .collect(Collectors.toList());
     }
 
+    @SuppressWarnings("unchecked")
+    private JsonArrayBuilder createExportedEntities(
+        final String exportName,
+        final String type,
+        final List<Exportable> entities) {
+
+        final Class<? extends Exportable> clazz;
+        try {
+            clazz = (Class<? extends Exportable>) Class.forName(type);
+        } catch (ClassNotFoundException ex) {
+            throw new UnexpectedErrorException(ex);
+        }
+
+        final Instance<AbstractEntityImExporter<?>> instance = imExporters
+            .select(new ProcessesLiteral(clazz));
+
+        final AbstractEntityImExporter<?> imExporter;
+        if (instance.isUnsatisfied()) {
+            throw new UnexpectedErrorException(String.format(
+                "No EntityImExporter for entity type \"%s\" available.",
+                type));
+        } else if (instance.isAmbiguous()) {
+            throw new UnexpectedErrorException(String.format(
+                "Instance reference for EntityImExporter for entity "
+                    + "type \"%s\" is ambiguous.",
+                type));
+        } else {
+            imExporter = instance.get();
+        }
+
+        final JsonArrayBuilder filesArrayBuilder = Json.createArrayBuilder();
+        for (Exportable entity : entities) {
+            final String filename = String.format("%s.json", entity.getUuid());
+            final OutputStream outputStream;
+            try {
+                outputStream = ccmFiles.createOutputStream(String.format(
+                    "exports/%s/%s/%s",
+                    exportName,
+                    type,
+                    filename));
+                filesArrayBuilder.add(filename);
+            } catch (FileAccessException
+                     | InsufficientPermissionsException ex) {
+                throw new UnexpectedErrorException(ex);
+            }
+
+            final String exportedEntity;
+            try {
+                exportedEntity = imExporter.exportEntity(entity);
+            } catch (ExportException ex) {
+                throw new UnexpectedErrorException(ex);
+            }
+            try (final OutputStreamWriter writer = new OutputStreamWriter(
+                outputStream, StandardCharsets.UTF_8)) {
+
+                writer.write(exportedEntity);
+
+            } catch (IOException ex) {
+                throw new UnexpectedErrorException(ex);
+            }
+        }
+
+        return filesArrayBuilder;
+    }
+
     private boolean isImportArchive(final String path) {
 
         final String manifestPath = String.format("imports/%s/ccm-export.json",
@@ -390,8 +402,9 @@ public class ImportExport {
 
     private ImportManifest createImportManifest(final String path) {
 
-        final String manifestPath = String.format("imports/%s/ccm-export.json",
+        final String manifestPath = String.format(
-                                                  path);
+            "imports/%s/ccm-export.json", path
+        );
 
         try (final InputStream inputStream = ccmFiles
             .createInputStream(manifestPath)) {
@@ -400,24 +413,33 @@ public class ImportExport {
             final JsonObject manifestJson = reader.readObject();
 
             if (!manifestJson.containsKey("created")) {
-                throw new IllegalArgumentException(String.format(
+                throw new IllegalArgumentException(
+                    String.format(
                         "The manifest file \"%s\" is malformed. "
                             + "Key \"created\" is missing.",
-                    manifestPath));
+                        manifestPath
+                    )
+                );
             }
 
             if (!manifestJson.containsKey("onServer")) {
-                throw new IllegalArgumentException(String.format(
+                throw new IllegalArgumentException(
+                    String.format(
                         "The manifest file \"%s\" is malformed. "
                             + "Key \"onServer\" is missing.",
-                    manifestPath));
+                        manifestPath
+                    )
+                );
             }
 
             if (!manifestJson.containsKey("types")) {
-                throw new IllegalArgumentException(String.format(
+                throw new IllegalArgumentException(
+                    String.format(
                         "The manifest file \"%s\" is malformed. "
                             + "Key \"types\" is missing.",
-                    manifestPath));
+                        manifestPath
+                    )
+                );
             }
 
             final LocalDateTime created = LocalDateTime
@@ -429,14 +451,16 @@ public class ImportExport {
 //                .collect(Collectors.toList());
             final JsonArray typesArray = manifestJson.getJsonArray("types");
             final List<String> types = new ArrayList<>();
-            for(int i = 0; i < typesArray.size(); i++) {
+            for (int i = 0; i < typesArray.size(); i++) {
                 types.add(typesArray.getString(i));
             }
 
             return new ImportManifest(
+                path,
                 Date.from(created.atZone(ZoneId.of("UTC")).toInstant()),
                 onServer,
-                types);
+                types
+            );
         } catch (IOException
                  | FileAccessException
                  | FileDoesNotExistException

ccm-core/src/main/java/org/libreccm/imexport/ImportManifest.java

@@ -29,19 +29,30 @@ import java.util.List;
  */
 public class ImportManifest {
 
+    private final String importName;
+
     private final Date created;
+
     private final String onServer;
+
     private final List<String> types;
 
-    public ImportManifest(final Date created,
+    public ImportManifest(
+        final String importName,
+        final Date created,
         final String onServer,
-                          final List<String> types) {
+        final List<String> types
-
+    ) {
+        this.importName = importName;
         this.created = created;
         this.onServer = onServer;
         this.types = types;
     }
 
+    public String getImportName() {
+        return importName;
+    }
+    
     public Date getCreated() {
         return new Date(created.getTime());
     }

ccm-core/src/main/java/org/libreccm/security/GroupImExporter.java

@@ -23,6 +23,7 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.Collections;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
@@ -46,23 +47,34 @@ public class GroupImExporter extends AbstractEntityImExporter<Group> {
     private GroupRepository groupRepository;
 
     @Override
-    protected Class<Group> getEntityClass() {
+    public Class<Group> getEntityClass() {
         return Group.class;
     }
 
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Group entity) {
-        
         entity.setPartyId(0);
-//        groupRepository.save(entity);
         entityManager.persist(entity);
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-        
         return Collections.emptySet();
     }
 
+    @Override
+    protected Group reloadEntity(final Group entity) {
+        return groupRepository
+            .findById(Objects.requireNonNull(entity).getPartyId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Group entity %s was not found in database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+
 }

ccm-core/src/main/java/org/libreccm/security/GroupMembership.java

@@ -56,14 +56,25 @@ import javax.persistence.Table;
 @Entity
 @Table(name = "GROUP_MEMBERSHIPS", schema = DB_SCHEMA)
 @NamedQueries({
-    @NamedQuery(name = "GroupMembership.findByUuid",
+    @NamedQuery(
-                query = "SELECT m FROM GroupMembership m WHERE m.uuid = :uuid"),
+        name = "GroupMembership.findById",
-    @NamedQuery(name = "GroupMembership.findByGroupAndUser",
+        query
+        = "SELECT m FROM GroupMembership m WHERE m.membershipId = :membershipId"
+    ),
+    @NamedQuery(
+        name = "GroupMembership.findByUuid",
+        query = "SELECT m FROM GroupMembership m WHERE m.uuid = :uuid"
+    ),
+    @NamedQuery(
+        name = "GroupMembership.findByGroupAndUser",
         query = "SELECT m FROM GroupMembership m "
-                            + "WHERE m.member = :member AND m.group = :group")})
+                    + "WHERE m.member = :member AND m.group = :group")
+})
 @XmlRootElement(name = "group-membership", namespace = CORE_XML_NS)
-@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class,
+@JsonIdentityInfo(
-                  property = "uuid")
+    generator = ObjectIdGenerators.PropertyGenerator.class,
+    property = "uuid"
+)
 public class GroupMembership implements Serializable, Exportable {
 
     private static final long serialVersionUID = 83192968306850665L;

ccm-core/src/main/java/org/libreccm/security/GroupMembershipImExporter.java

@@ -23,10 +23,12 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
+import javax.persistence.NoResultException;
 import javax.transaction.Transactional;
 
 /**
@@ -43,14 +45,12 @@ public class GroupMembershipImExporter
     private EntityManager entityManager;
 
     @Override
-    protected Class<GroupMembership> getEntityClass() {
+    public Class<GroupMembership> getEntityClass() {
-
         return GroupMembership.class;
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         final Set<Class<? extends Exportable>> entities = new HashSet<>();
         entities.add(User.class);
         entities.add(Group.class);
@@ -61,9 +61,30 @@ public class GroupMembershipImExporter
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final GroupMembership entity) {
-
         entity.setMembershipId(0);
         entityManager.persist(entity);
     }
 
+    @Override
+    protected GroupMembership reloadEntity(final GroupMembership entity) {
+        try {
+            return entityManager
+                .createNamedQuery(
+                    "GroupMembership.findById", GroupMembership.class
+                )
+                .setParameter(
+                    "membershipId",
+                    Objects.requireNonNull(entity).getMembershipId()
+                )
+                .getSingleResult();
+        } catch (NoResultException ex) {
+            throw new IllegalArgumentException(
+                String.format(
+                    "GroupMembership entity %s does not exist in the database.",
+                    Objects.toString(entity)
+                )
+            );
+        }
+    }
+
 }

ccm-core/src/main/java/org/libreccm/security/PermissionImExporter.java

@@ -23,6 +23,7 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
@@ -35,31 +36,41 @@ import javax.inject.Inject;
  */
 @RequestScoped
 @Processes(Permission.class)
-public class PermissionImExporter extends AbstractEntityImExporter<Permission>{
+public class PermissionImExporter extends AbstractEntityImExporter<Permission> {
 
     @Inject
     private PermissionRepository permissionRepository;
 
     @Override
-    protected Class<Permission> getEntityClass() {
+    public Class<Permission> getEntityClass() {
         return Permission.class;
     }
 
     @Override
     protected void saveImportedEntity(final Permission entity) {
-        
         permissionRepository.save(entity);
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-        
         final Set<Class<? extends Exportable>> classes = new HashSet<>();
         classes.add(Role.class);
 
         return classes;
     }
 
-    
+    @Override
+    protected Permission reloadEntity(final Permission entity) {
+        return permissionRepository
+            .findById(Objects.requireNonNull(entity).getPermissionId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Permission entity %s not found in the database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
 
 }

ccm-core/src/main/java/org/libreccm/security/RoleImExporter.java

@@ -18,42 +18,85 @@
  */
 package org.libreccm.security;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.libreccm.core.UnexpectedErrorException;
 import org.libreccm.imexport.AbstractEntityImExporter;
+import org.libreccm.imexport.ExportException;
 import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.Collections;
+import java.util.Objects;
 import java.util.Set;
 
+import javax.enterprise.context.Dependent;
 import javax.inject.Inject;
+import javax.persistence.EntityManager;
+import javax.transaction.Transactional;
 
 /**
  * Exporter/Importer for {@link Role}s.
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
+@Dependent
 @Processes(Role.class)
 public class RoleImExporter extends AbstractEntityImExporter<Role> {
 
+    private static final Logger LOGGER = LogManager.getLogger(
+        RoleImExporter.class);
+
+    @Inject
+    private EntityManager entityManager;
+
     @Inject
     private RoleRepository roleRepository;
 
     @Override
-    protected Class<Role> getEntityClass() {
+    public Class<Role> getEntityClass() {
-        
         return Role.class;
     }
 
+    @Transactional(Transactional.TxType.REQUIRED)
+    @Override
+    public String exportEntity(final Exportable entity) throws ExportException {
+        final Role role = roleRepository
+            .findById(((Role) entity).getRoleId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Provided entity %d does not exist in database.",
+                        entity)
+                )
+            );
+        role.getDescription().getValues().forEach((locale, value) -> LOGGER
+            .info("{}: {}", locale, value));
+        return super.exportEntity(entity);
+    }
+
     @Override
     protected void saveImportedEntity(final Role entity) {
-        
         roleRepository.save(entity);
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         return Collections.emptySet();
     }
 
+    @Override
+    protected Role reloadEntity(final Role entity) {
+        return roleRepository
+            .findById(Objects.requireNonNull(entity).getRoleId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "Role entity %s not found in database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+
 }

ccm-core/src/main/java/org/libreccm/security/RoleMembership.java

@@ -56,11 +56,20 @@ import javax.persistence.Table;
 @Entity
 @Table(name = "ROLE_MEMBERSHIPS", schema = DB_SCHEMA)
 @NamedQueries({
-    @NamedQuery(name = "RoleMembership.findByUuid",
+    @NamedQuery(
-                query = "SELECT m FROM RoleMembership m WHERE m.uuid = :uuid"),
+        name = "RoleMembership.findById",
-    @NamedQuery(name = "RoleMembership.findByRoleAndMember",
+        query
-                query = "SELECT m FROM RoleMembership m "
+        = "SELECT m FROM RoleMembership m WHERE m.membershipId = :membershipId"
-                            + "WHERE m.member = :member AND m.role = :role")
+    ),
+    @NamedQuery(
+        name = "RoleMembership.findByUuid",
+        query = "SELECT m FROM RoleMembership m WHERE m.uuid = :uuid"
+    ),
+    @NamedQuery(
+        name = "RoleMembership.findByRoleAndMember",
+        query
+        = "SELECT m FROM RoleMembership m WHERE m.member = :member AND m.role = :role"
+    )
 })
 @XmlRootElement(name = "role-membership", namespace = CORE_XML_NS)
 @JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class,

ccm-core/src/main/java/org/libreccm/security/RoleMembershipImExporter.java

@@ -23,10 +23,12 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.HashSet;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
+import javax.persistence.NoResultException;
 import javax.transaction.Transactional;
 
 /**
@@ -42,21 +44,18 @@ public class RoleMembershipImExporter
     private EntityManager entityManager;
 
     @Override
-    protected Class<RoleMembership> getEntityClass() {
+    public Class<RoleMembership> getEntityClass() {
-
         return RoleMembership.class;
     }
 
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final RoleMembership entity) {
-
         entityManager.persist(entity);
     }
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         final Set<Class<? extends Exportable>> classes = new HashSet<>();
         classes.add(User.class);
         classes.add(Group.class);
@@ -65,4 +64,25 @@ public class RoleMembershipImExporter
         return classes;
     }
 
+    @Override
+    protected RoleMembership reloadEntity(final RoleMembership entity) {
+        try {
+            return entityManager
+                .createNamedQuery(
+                    "RoleMembership.findById", RoleMembership.class
+                )
+                .setParameter(
+                    "membershipId",
+                    Objects.requireNonNull(entity).getMembershipId()
+                ).getSingleResult();
+        } catch (NoResultException ex) {
+            throw new IllegalArgumentException(
+                String.format(
+                    "RoleMembeship entity %s not found in database.",
+                    Objects.toString(entity)
+                )
+            );
+        }
+    }
+
 }

ccm-core/src/main/java/org/libreccm/security/User.java

@@ -59,6 +59,7 @@ import javax.persistence.NamedQueries;
 import javax.persistence.NamedQuery;
 import javax.persistence.NamedSubgraph;
 import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
 import javax.persistence.Table;
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
@@ -186,6 +187,7 @@ public class User extends Party implements Serializable, Exportable {
      * Additional email addresses of the user.
      */
     @ElementCollection(fetch = FetchType.EAGER)
+    @OrderBy("address")
     @CollectionTable(name = "USER_EMAIL_ADDRESSES",
                      schema = DB_SCHEMA,
                      joinColumns = {
@@ -363,7 +365,8 @@ public class User extends Party implements Serializable, Exportable {
 
     @Override
     public JsonObjectBuilder buildJson() {
-        final JsonArrayBuilder emailAddressesArrayBuilder = Json.createArrayBuilder();
+        final JsonArrayBuilder emailAddressesArrayBuilder = Json
+            .createArrayBuilder();
 
         emailAddresses
             .stream()

ccm-core/src/main/java/org/libreccm/security/UserImExporter.java

@@ -23,6 +23,7 @@ import org.libreccm.imexport.Exportable;
 import org.libreccm.imexport.Processes;
 
 import java.util.Collections;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.enterprise.context.RequestScoped;
@@ -46,14 +47,13 @@ public class UserImExporter extends AbstractEntityImExporter<User> {
     private UserRepository userRepository;
 
     @Override
-    protected Class<User> getEntityClass() {
+    public Class<User> getEntityClass() {
         return User.class;
     }
 
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final User entity) {
-
         // Reset partyId.
         entity.setPartyId(0);
 //        userRepository.save(entity);
@@ -62,8 +62,21 @@ public class UserImExporter extends AbstractEntityImExporter<User> {
 
     @Override
     protected Set<Class<? extends Exportable>> getRequiredEntities() {
-
         return Collections.emptySet();
     }
 
+    @Override
+    protected User reloadEntity(final User entity) {
+        return userRepository
+            .findById(Objects.requireNonNull(entity).getPartyId())
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "User entity %s was not found in database.",
+                        Objects.toString(entity)
+                    )
+                )
+            );
+    }
+
 }

ccm-core/src/main/java/org/libreccm/sites/Site.java

@@ -44,6 +44,10 @@ import javax.persistence.Table;
 @Entity
 @Table(name = "SITES", schema = DB_SCHEMA)
 @NamedQueries({
+    @NamedQuery(
+        name = "Site.findByUuid",
+        query = "SELECT s FROM Site s WHERE s.uuid = :uuid"
+    ),
     @NamedQuery(
         name = "Site.findByDomain",
         query = "SELECT s FROM Site s "

ccm-core/src/main/java/org/libreccm/sites/SiteAwareApplication.java

@@ -67,7 +67,7 @@ public class SiteAwareApplication extends CcmApplication {
 
     @Override
     public int hashCode() {
-        int hash = 3;
+        int hash = super.hashCode();
         if (site != null) {
             hash = 59 * hash + Objects.hashCode(site.getDomainOfSite());
             hash = 59 * hash + Objects.hashCode(site.isDefaultSite());
@@ -84,6 +84,9 @@ public class SiteAwareApplication extends CcmApplication {
         if (obj == null) {
             return false;
         }
+        if (!super.equals(obj)) {
+            return false;
+        }
         if (!(obj instanceof SiteAwareApplication)) {
             return false;
         }

ccm-core/src/main/java/org/libreccm/sites/SiteRepository.java

@@ -41,6 +41,28 @@ public class SiteRepository extends AbstractEntityRepository<Long, Site> {
 
     private static final long serialVersionUID = 3120528987720524155L;
 
+    /**
+     * Retrieve a {@link Site} by its UUID.
+     *
+     * @param uuid The UUID of the site.
+     *
+     * @return An {@link Optional} containing the {@link Site} if a site for the
+     *         provided UUID exists.
+     */
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Site> findByUuid(final String uuid) {
+        try {
+            return Optional.of(
+                getEntityManager()
+                    .createNamedQuery("Site.findByUuid", Site.class)
+                    .setParameter("uuid", uuid)
+                    .getSingleResult()
+            );
+        } catch (NoResultException ex) {
+            return Optional.empty();
+        }
+    }
+
     /**
      * Retrieve the {@link Site} for a specific domain.
      *

ccm-core/src/main/java/org/libreccm/theming/FileSystemThemeProvider.java

@@ -18,8 +18,11 @@
  */
 package org.libreccm.theming;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.libreccm.core.UnexpectedErrorException;
 import org.libreccm.files.CcmFiles;
+import org.libreccm.files.CcmFilesNotConfiguredException;
 import org.libreccm.files.DirectoryNotEmptyException;
 import org.libreccm.files.FileAccessException;
 import org.libreccm.files.FileAlreadyExistsException;
@@ -54,6 +57,10 @@ public class FileSystemThemeProvider implements ThemeProvider {
 
     private static final long serialVersionUID = 1L;
     
+    private static final Logger LOGGER = LogManager.getLogger(
+        FileSystemThemeProvider.class
+    );
+
     private static final String BASE_PATH = "/themes";
     private static final String DRAFT_THEMES_PATH = BASE_PATH + "/draft";
     private static final String LIVE_THEMES_PATH = BASE_PATH + "/live";
@@ -70,11 +77,15 @@ public class FileSystemThemeProvider implements ThemeProvider {
     @Inject
     private ThemeFileInfoUtil themeFileInfoUtil;
 
+    @Override
+    public String getName() {
+        return "FileSystemThemeProvider";
+    }
+    
     @Override
     public List<ThemeInfo> getThemes() {
 
         try {
-
             if (!ccmFiles.isDirectory(BASE_PATH)
                     || !ccmFiles.isDirectory(DRAFT_THEMES_PATH)) {
 
@@ -92,8 +103,10 @@ public class FileSystemThemeProvider implements ThemeProvider {
         } catch (FileAccessException
                      | FileDoesNotExistException
                      | InsufficientPermissionsException ex) {
-
             throw new UnexpectedErrorException(ex);
+        } catch(CcmFilesNotConfiguredException ex) {
+            LOGGER.warn(ex);
+            return Collections.emptyList();
         }
     }
 
@@ -119,6 +132,9 @@ public class FileSystemThemeProvider implements ThemeProvider {
                      | InsufficientPermissionsException ex) {
 
             throw new UnexpectedErrorException(ex);
+        } catch(CcmFilesNotConfiguredException ex) {
+            LOGGER.warn(ex);
+            return Collections.emptyList();
         }
     }
 

ccm-core/src/main/java/org/libreccm/theming/StaticThemeProvider.java

@@ -80,6 +80,11 @@ public class StaticThemeProvider implements ThemeProvider {
     @Inject
     private ThemeFileInfoUtil themeFileInfoUtil;
 
+    @Override
+    public String getName() {
+        return "StaticThemeProvider";
+    }
+    
     @Override
     public List<ThemeInfo> getThemes() {
 

ccm-core/src/main/java/org/libreccm/theming/ThemeProvider.java

@@ -36,6 +36,12 @@ import javax.enterprise.context.RequestScoped;
  */
 public interface ThemeProvider extends Serializable {
 
+    /**
+     * A human readable name for the {@code ThemeProvider} implementation.
+     * @return 
+     */
+    String getName();
+    
     /**
      * Provides a list of all themes provided by this theme provider. The list
      * should be ordered by the name of the theme.

ccm-core/src/main/java/org/libreccm/theming/Themes.java

@@ -28,7 +28,9 @@ import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 import javax.enterprise.context.RequestScoped;
 import javax.enterprise.inject.Any;
@@ -53,6 +55,7 @@ public class Themes implements Serializable {
     @Any
     private Instance<ThemeProvider> providers;
 //
+
     @Inject
     private ThemeProcessors themeProcessors;
 
@@ -108,6 +111,100 @@ public class Themes implements Serializable {
         return Optional.empty();
     }
 
+    public List<ThemeProvider> getThemeProviders() {
+        return providers
+            .stream()
+            .collect(Collectors.toList());
+    }
+
+    public Optional<ThemeProvider> findThemeProviderInstance(
+        final Class<? extends ThemeProvider> ofClazz
+    ) {
+        final Instance<? extends ThemeProvider> instance = providers
+            .select(ofClazz);
+        if (instance.isResolvable()) {
+            return Optional.of(instance.get());
+        } else {
+            return Optional.empty();
+        }
+    }
+
+    public ThemeInfo createTheme(
+        final String themeName, final String providerName
+    ) {
+        final Class<ThemeProvider> providerClass = getThemeProviderClass(
+            providerName
+        );
+
+        return createTheme(
+            themeName,
+            findThemeProviderInstance(providerClass).orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No instance of ThemeProvider implementation %s available.",
+                        providerName
+                    )
+                )
+            )
+        );
+    }
+
+    public ThemeInfo createTheme(
+        final String themeName, final ThemeProvider themeProvider
+    ) {
+        return themeProvider.createTheme(themeName);
+    }
+
+    public void deleteTheme(final String themeName) {
+        final Optional<ThemeProvider> provider = findProviderOfTheme(
+            Objects.requireNonNull(
+                themeName,
+                "Can't delete theme null."
+            )
+        );
+
+        if (provider.isPresent()) {
+            provider.get().deleteTheme(themeName);
+        } else {
+            throw new IllegalArgumentException(
+                String.format(
+                    "No provider providing a theme named %s found.",
+                    themeName
+                )
+            );
+        }
+    }
+
+    public void publishTheme(final String themeName) {
+        final Optional<ThemeProvider> provider = findProviderOfTheme(themeName);
+
+        if (provider.isPresent()) {
+            provider.get().publishTheme(themeName);
+        } else {
+            throw new IllegalArgumentException(
+                String.format(
+                    "No provider providing a theme named %s found.",
+                    themeName
+                )
+            );
+        }
+    }
+
+    public void unpublishTheme(final String themeName) {
+        final Optional<ThemeProvider> provider = findProviderOfTheme(themeName);
+
+        if (provider.isPresent()) {
+            provider.get().unpublishTheme(themeName);
+        } else {
+            throw new IllegalArgumentException(
+                String.format(
+                    "No provider providing a theme named %s found.",
+                    themeName
+                )
+            );
+        }
+    }
+
     /**
      * Creates HTML from the result of rendering a {@link PageModel}.
      *
@@ -240,7 +337,37 @@ public class Themes implements Serializable {
 
         final ThemeProvider provider = forTheme.get();
         provider.deleteThemeFile(theme.getName(), path);
+    }
 
+    @SuppressWarnings("unchecked")
+    private Class<ThemeProvider> getThemeProviderClass(
+        final String providerName
+    ) {
+        try {
+            return (Class<ThemeProvider>) Class.forName(providerName);
+        } catch (ClassNotFoundException ex) {
+            throw new IllegalArgumentException(
+                String.format(
+                    "No ThemeProvider implementation %s available.",
+                    providerName
+                )
+            );
+        }
+    }
+
+    private Optional<ThemeProvider> findProviderOfTheme(
+        final String themeName
+    ) {
+        final List<ThemeProvider> providersList = new ArrayList<>();
+        providers.forEach(provider -> providersList.add(provider));
+
+        return providersList
+            .stream()
+            .filter(
+                current -> current.providesTheme(
+                    themeName, ThemeVersion.DRAFT
+                )
+            ).findAny();
     }
 
 }

ccm-core/src/main/java/org/libreccm/theming/db/DatabaseThemeProvider.java

@@ -71,6 +71,11 @@ public class DatabaseThemeProvider implements ThemeProvider {
     @Inject
     private ThemeRepository themeRepository;
 
+    @Override
+    public String getName() {
+        return "DatabaseThemeProvider";
+    }
+
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     public List<ThemeInfo> getThemes() {
@@ -419,6 +424,7 @@ public class DatabaseThemeProvider implements ThemeProvider {
     private class DataFileOutputStream extends OutputStream {
 
         private final DataFile dataFile;
+
         private final ByteArrayOutputStream outputStream;
 
         private DataFileOutputStream(final DataFile dataFile) {

ccm-core/src/main/java/org/libreccm/ui/IsAuthenticatedFilter.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui;
+
+import org.libreccm.security.Shiro;
+
+import java.io.IOException;
+import java.net.URI;
+
+import javax.inject.Inject;
+import javax.servlet.ServletContext;
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerRequestFilter;
+import javax.ws.rs.container.PreMatching;
+import javax.ws.rs.core.Response;
+
+/**
+ * Filter for securing EE MVC UIs. Checks if the current user is authenticated.
+ * If not the user is redirected to the login application.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@PreMatching
+public class IsAuthenticatedFilter implements ContainerRequestFilter {
+
+    @Inject
+    private ServletContext servletContext;
+
+    @Inject
+    private Shiro shiro;
+
+    @Override
+    public void filter(final ContainerRequestContext requestContext)
+        throws IOException {
+        if (!shiro.getSubject().isAuthenticated()) {
+            final String contextPath = servletContext.getContextPath();
+            final String returnUrl = requestContext
+                .getUriInfo()
+                .getRequestUri()
+                .getPath();
+            requestContext.abortWith(
+                Response.temporaryRedirect(
+                    URI.create(
+                        String.format(
+                            "/%s/ccm/register?return_url=%s",
+                            contextPath,
+                            returnUrl
+                        )
+                    )
+                ).build()
+            );
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/Message.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui;
+
+/**
+ * Stores a message to be displayed in the UI.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class Message {
+
+    /**
+     * The message (or the translation key for the message).
+     */
+    private final String message;
+
+    /**
+     * The type of the message.
+     */
+    private final MessageType messageType;
+
+    public Message(String message, MessageType messageType) {
+        this.message = message;
+        this.messageType = messageType;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public MessageType getMessageType() {
+        return messageType;
+    }
+    
+    public String getMessageTypeClass() {
+        return messageType.toString().toLowerCase();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/MessageType.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui;
+
+/**
+ * Possible message types. The types are equivalent to the contextual classes
+ * of the Bootstrap framework.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public enum MessageType {
+
+    PRIMARY,
+    SECONDARY,
+    SUCCESS,
+    DANGER,
+    WARNING,
+    INFO,
+    LIGHT,
+    DARK,
+
+}

ccm-core/src/main/java/org/libreccm/ui/MvcLocaleResolver.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui;
+
+import org.libreccm.l10n.GlobalizationHelper;
+
+import java.util.Locale;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.mvc.locale.LocaleResolver;
+import javax.mvc.locale.LocaleResolverContext;
+
+/**
+ * A locale resolver implementation that simply passes the locale negoiated by
+ * LibreCCM to Jakarta EE MVC.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+public class MvcLocaleResolver implements LocaleResolver {
+
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    @Override
+    public Locale resolveLocale(final LocaleResolverContext context) {
+        return globalizationHelper.getNegotiatedLocale();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminApplication.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.libreccm.ui.IsAuthenticatedFilter;
+
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import javax.enterprise.inject.Instance;
+import javax.inject.Inject;
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.Application;
+
+/**
+ * Collects the controllers for the admin application and registers them with
+ * JAX-RS.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@ApplicationPath("/@admin")
+public class AdminApplication extends Application {
+
+    private static final Logger LOGGER = LogManager.getLogger(
+        AdminApplication.class
+    );
+
+    /**
+     * Injection point for the admin pages.
+     */
+    @Inject
+    private Instance<AdminPage> adminPages;
+
+    @Override
+    public Set<Class<?>> getClasses() {
+        final Set<Class<?>> classes = new HashSet<>();
+
+        classes.add(IsAuthenticatedFilter.class);
+
+        classes.addAll(
+            adminPages
+                .stream()
+                .map(AdminPage::getControllerClasses)
+                .flatMap(controllers -> controllers.stream())
+                .collect(Collectors.toSet())
+        );
+
+        LOGGER.debug(
+            "Adding classes to AdminApplication: {}", Objects.toString(classes)
+        );
+
+        return classes;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminConstants.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin;
+
+/**
+ * Some constants for the admin application
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class AdminConstants {
+    
+    private AdminConstants() {
+        // Nothing
+    }
+    
+    /**
+     * Bundle that provides the translations for the admin application.
+     */
+    public static final String ADMIN_BUNDLE = "org.libreccm.ui.AdminBundle";
+    
+    
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminMessages.java

@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin;
+
+import org.libreccm.l10n.GlobalizationHelper;
+
+import java.text.MessageFormat;
+import java.util.AbstractMap;
+import java.util.List;
+import java.util.ResourceBundle;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import javax.annotation.PostConstruct;
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.inject.Named;
+
+/**
+ * Provides simple access to the messages in the admin bundle. The make it as
+ * easy as possible to access the messages this class is implemented as a map a
+ * made available as named bean. For simple messages, {@code AdminMesssages} can
+ * be used like a map in a facelets template:
+ *
+ * <pre>
+ * #{AdminMessages['some.message.key'])
+ * </pre>
+ *
+ * Messages with placeholders can be retrieved using
+ * {@link #getMessage(java.lang.String, java.util.List)} or
+ * {@link #getMessage(java.lang.String, java.lang.Object[])}.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Named("AdminMessages")
+public class AdminMessages extends AbstractMap<String, String> {
+
+    /**
+     * Provides access to the locale negoiated by LibreCCM.
+     */
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    /**
+     * The {@link ResourceBundle} to use.
+     */
+    private ResourceBundle messages;
+
+    /**
+     * Loads the resource bundle.
+     */
+    @PostConstruct
+    private void init() {
+        messages = ResourceBundle.getBundle(
+            AdminConstants.ADMIN_BUNDLE,
+            globalizationHelper.getNegotiatedLocale()
+        );
+    }
+
+    /**
+     * Retrieves a message from the resource bundle.
+     * 
+     * @param key The key of the message.
+     * @return The translated message or {@code ???message???} if the the key is
+     * not found in the resource bundle (message is replaced with the key).
+     */
+    public String getMessage(final String key) {
+        if (messages.containsKey(key)) {
+            return messages.getString(key);
+        } else {
+            return String.format("???%s???", key);
+        }
+    }
+
+    /**
+     * Retrieves a message with placeholders.
+     * 
+     * @param key The key of the message.
+     * @param parameters The parameters for the placeholders.
+     * @return The translated message or {@code ???message???} if the the key is
+     * not found in the resource bundle (message is replaced with the key).
+     */
+    public String getMessage(
+        final String key, final List<Object> parameters
+    ) {
+        return getMessage(key, parameters.toArray());
+    }
+
+    /**
+     * The translated message or {@code ???message???} if the the key is
+     * not found in the resource bundle (message is replaced with the key).
+     * 
+      @param key The key of the message.
+     * @param parameters The parameters for the placeholders.
+     * @return The translated message or {@code ???message???} if the the key is
+     * not found in the resource bundle (message is replaced with the key).
+     */
+    public String getMessage(
+        final String key, final Object[] parameters
+    ) {
+        if (messages.containsKey(key)) {
+            return MessageFormat.format(messages.getString(key), parameters);
+        } else {
+            return String.format("???%s???", key);
+        }
+    }
+
+    @Override
+    public String get(final Object key) {
+        return get((String) key);
+    }
+    
+    public String get(final String key) {
+        return getMessage(key);
+    }
+
+    @Override
+    public Set<Entry<String, String>> entrySet() {
+        return messages
+            .keySet()
+            .stream()
+            .collect(
+                Collectors.toMap(key -> key, key -> messages.getString(key))
+            )
+            .entrySet();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminPage.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin;
+
+import java.util.Set;
+
+import javax.mvc.MvcContext;
+
+/**
+ * Implementations of this interface provide the controllers etc. for an admin
+ * page.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public interface AdminPage {
+
+    /**
+     * Classes implementing the controllers of the page.
+     *
+     * @return A set of controllers to be added to the {@link AdminApplication}.
+     */
+    Set<Class<?>> getControllerClasses();
+
+    /**
+     * A identifier to use by {@link MvcContext#uri(java.lang.String)} to
+     * generate the URI of the page. The identifier has the same format as used
+     * in JavaDoc:
+     * <pre>
+     *     ControllerSimpleClassName#methodName
+     * </pre>
+     *
+     * @return The identifier to use for generating the URL of the page
+     */
+    String getUriIdentifier();
+
+    /**
+     * Gets the resourcebundle which provides the label of the admin page.
+     *
+     * @return The bundle to use for retrieving the label of the page.
+     */
+    String getLabelBundle();
+
+    /**
+     * Gets the key for retrieving the label of the page from the label bundle.
+     *
+     * @return The key of the label.
+     */
+    String getLabelKey();
+
+    /**
+     * Gets the resourcebundle which provides the description of the admin page.
+     *
+     * @return The bundle to use for retrieving the label of the page.
+     */
+    String getDescriptionBundle();
+
+    /**
+     * Gets the key for retrieving the description of the page from the
+     * description bundle.
+     *
+     * @return The key of the label.
+     */
+    String getDescriptionKey();
+
+    /**
+     * Name of icon to use.
+     *
+     * @return The icon to use for the page.
+     */
+    String getIcon();
+
+    /**
+     * Gets the position of the page in the admin nav bar.
+     *
+     * @return The position of the page in the admin navigation.
+     */
+    int getPosition();
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminPageModel.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin;
+
+import java.util.Comparator;
+
+/**
+ * Model for the data of an admin page.
+ *
+ * @see AdminPage
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class AdminPageModel implements Comparable<AdminPageModel> {
+
+    private String uriIdentifier;
+
+    private String label;
+
+    private String description;
+
+    private String icon;
+
+    private long position;
+
+    public String getUriIdentifier() {
+        return uriIdentifier;
+    }
+
+    protected void setUriIdentifier(final String uriIdentifier) {
+        this.uriIdentifier = uriIdentifier;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+
+    protected void setLabel(final String label) {
+        this.label = label;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    protected void setDescription(final String description) {
+        this.description = description;
+    }
+
+    public String getIcon() {
+        return icon;
+    }
+
+    protected void setIcon(final String icon) {
+        this.icon = icon;
+    }
+
+    public long getPosition() {
+        return position;
+    }
+
+    protected void setPosition(final long position) {
+        this.position = position;
+    }
+
+    @Override
+    public int compareTo(final AdminPageModel other) {
+        return Comparator
+            .nullsFirst(
+                Comparator
+                    .comparing(AdminPageModel::getPosition)
+                    .thenComparing(AdminPageModel::getLabel)
+            ).compare(this, other);
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminPagesModel.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin;
+
+import org.libreccm.l10n.GlobalizationHelper;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.ResourceBundle;
+import java.util.stream.Collectors;
+
+import javax.enterprise.context.RequestScoped;
+import javax.enterprise.inject.Instance;
+import javax.inject.Inject;
+import javax.inject.Named;
+
+/**
+ * Model for the available admin pages.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Named("AdminPagesModel")
+public class AdminPagesModel {
+
+    /**
+     * Injection point for the admin pages.
+     */
+    @Inject
+    private Instance<AdminPage> adminPages;
+
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    /**
+     * Cache for bundles
+     */
+    private final Map<String, ResourceBundle> bundles = new HashMap<>();
+
+    /**
+     * Retrieves the available admin pages and converts them into
+     * {@link AdminPageModel}s for usage in the views.
+     *
+     * @return A list of the available admin pages.
+     */
+    public List<AdminPageModel> getAdminPages() {
+        return adminPages
+            .stream()
+            .sorted(
+                (page1, page2) -> Integer.compare(
+                    page1.getPosition(), page2.getPosition()
+                )
+            )
+            .map(this::buildAdminPageModel)
+            .collect(Collectors.toList());
+    }
+
+    private AdminPageModel buildAdminPageModel(final AdminPage fromAdminPage) {
+        final ResourceBundle labelBundle = getBundle(
+            fromAdminPage.getLabelBundle()
+        );
+        final ResourceBundle descriptionBundle = getBundle(
+            fromAdminPage.getDescriptionBundle()
+        );
+
+        final AdminPageModel model = new AdminPageModel();
+        model.setUriIdentifier(fromAdminPage.getUriIdentifier());
+        model.setLabel(labelBundle.getString(fromAdminPage.getLabelKey()));
+        model.setDescription(
+            descriptionBundle.getString(
+                fromAdminPage.getDescriptionKey()
+            )
+        );
+        model.setIcon(fromAdminPage.getIcon());
+        model.setPosition(fromAdminPage.getPosition());
+        return model;
+    }
+
+    private ResourceBundle getBundle(final String bundleName) {
+        if (bundles.containsKey(bundleName)) {
+            return bundles.get(bundleName);
+        } else {
+            final ResourceBundle bundle = ResourceBundle.getBundle(
+                bundleName,
+                globalizationHelper.getNegotiatedLocale()
+            );
+            bundles.put(bundleName, bundle);
+            return bundle;
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/applications/ApplicationController.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.applications;
+
+/**
+ * Interface for controllers providing the UI for managing the instances of 
+ * an application.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public interface ApplicationController {
+    
+    String getApplication();
+    
+}

ccm-core/src/main/java/org/libreccm/ui/admin/applications/ApplicationTypeInfoItem.java

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.applications;
+
+import java.util.Objects;
+
+/**
+ * Data Transfer Object providing the information about an application. Used for
+ * rendering the informations the available applications in UI.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class ApplicationTypeInfoItem implements
+    Comparable<ApplicationTypeInfoItem> {
+
+    /**
+     * Name of the application.
+     */
+    private String name;
+
+    /**
+     * Localized title of the application, if available in the language of the
+     * current user.
+     */
+    private String title;
+
+    /**
+     * Localized title of the application, if available in the language of the
+     * current user.
+     */
+    private String description;
+
+    /**
+     * Is the application a singleton application?
+     */
+    private boolean singleton;
+
+    /**
+     * Number of existing instances of the application.
+     */
+    private long numberOfInstances;
+
+    /**
+     * Link the {@link ApplicationController} implementation of the application,
+     * if an implementation is available.
+     */
+    private String controllerLink;
+
+    protected ApplicationTypeInfoItem() {
+        // Nothing
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    protected void setName(final String name) {
+        this.name = name;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    protected void setTitle(final String title) {
+        this.title = title;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    protected void setDescription(final String description) {
+        this.description = description;
+    }
+
+    public boolean isSingleton() {
+        return singleton;
+    }
+
+    protected void setSingleton(final boolean singleton) {
+        this.singleton = singleton;
+    }
+
+    public long getNumberOfInstances() {
+        return numberOfInstances;
+    }
+
+    protected void setNumberOfInstances(final long numberOfInstances) {
+        this.numberOfInstances = numberOfInstances;
+    }
+
+    public String getControllerLink() {
+        return controllerLink;
+    }
+
+    protected void setControllerLink(final String controllerLink) {
+        this.controllerLink = controllerLink;
+    }
+
+    @Override
+    public int compareTo(final ApplicationTypeInfoItem other) {
+        if (other == null) {
+            return 1;
+        }
+
+        int result = Objects.compare(title, other.getTitle(), String::compareTo);
+        if (result == 0) {
+            result = Objects.compare(name, other.getName(), String::compareTo);
+        }
+
+        return result;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/applications/ApplicationsController.java

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.applications;
+
+import org.libreccm.core.CoreConstants;
+import org.libreccm.l10n.GlobalizationHelper;
+import org.libreccm.l10n.LocalizedTextsUtil;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.web.ApplicationManager;
+import org.libreccm.web.ApplicationRepository;
+import org.libreccm.web.ApplicationType;
+
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.mvc.Controller;
+import javax.mvc.Models;
+import javax.transaction.Transactional;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+
+/**
+ * Controller for the UI for managing application instances.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Controller
+@Path("/applications")
+public class ApplicationsController {
+
+    @Inject
+    private ApplicationManager appManager;
+
+    @Inject
+    private ApplicationRepository appRepository;
+
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    @Inject
+    private Models models;
+
+    /**
+     * Retrives the avaiable application types, creates
+     * {@link ApplicationTypeInfoItem}s for them and makes them available using
+     * {@link #models}.
+     *
+     * @return The template to render.
+     */
+    @GET
+    @Path("/")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String getApplicationTypes() {
+        final List<ApplicationTypeInfoItem> appTypes = appManager
+            .getApplicationTypes()
+            .entrySet()
+            .stream()
+            .map(Map.Entry::getValue)
+            .map(this::buildTypeInfoItem)
+            .sorted()
+            .collect(Collectors.toList());
+
+        models.put("applicationTypes", appTypes);
+
+        return "org/libreccm/ui/admin/applications/applicationtypes.xhtml";
+    }
+
+    /**
+     * Helper method for building an {@link ApplicationTypeInfoItem} for an
+     * {@link ApplicationType}.
+     *
+     * @param applicationType The application type.
+     *
+     * @return An {@link ApplicationTypeInfoItem} for the provided application
+     *         type.
+     */
+    private ApplicationTypeInfoItem buildTypeInfoItem(
+        final ApplicationType applicationType
+    ) {
+        final ApplicationTypeInfoItem item = new ApplicationTypeInfoItem();
+        item.setName(applicationType.name());
+
+        final LocalizedTextsUtil textsUtil = globalizationHelper
+            .getLocalizedTextsUtil(applicationType.descBundle());
+        item.setTitle(textsUtil.getText(applicationType.titleKey()));
+        item.setDescription(textsUtil.getText(applicationType.descKey()));
+        item.setSingleton(applicationType.singleton());
+        item.setNumberOfInstances(
+            appRepository.findByType(applicationType.name()).size()
+        );
+
+        final Class<? extends ApplicationController> controllerClass
+            = applicationType.applicationController();
+
+        if (!DefaultApplicationController.class.isAssignableFrom(
+            controllerClass
+        )) {
+            item.setControllerLink(
+                String.format(
+                    "%s#getApplication",
+                    controllerClass.getSimpleName())
+            );
+        }
+
+        return item;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/applications/ApplicationsPage.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.applications;
+
+import org.libreccm.ui.admin.AdminConstants;
+import org.libreccm.ui.admin.AdminPage;
+import org.libreccm.web.ApplicationManager;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.inject.Inject;
+
+/**
+ * {@link AdminPage} for managing applications.
+ *  
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@ApplicationScoped
+public class ApplicationsPage implements AdminPage {
+
+    @Inject
+    private ApplicationManager applicationManager;
+
+    @Override
+    public Set<Class<?>> getControllerClasses() {
+        final Set<Class<?>> classes = new HashSet<>();
+        classes.add(ApplicationsController.class);
+
+        classes.addAll(
+            applicationManager
+                .getApplicationTypes()
+                .entrySet()
+                .stream()
+                .map(type -> type.getValue().applicationController())
+                .collect(Collectors.toSet())
+        );
+
+        return classes;
+    }
+
+    @Override
+    public String getUriIdentifier() {
+        return String.format(
+            "%s#getApplicationTypes",
+            ApplicationsController.class.getSimpleName()
+        );
+    }
+
+    @Override
+    public String getLabelBundle() {
+        return AdminConstants.ADMIN_BUNDLE;
+    }
+
+    @Override
+    public String getLabelKey() {
+        return "applications.label";
+    }
+
+    @Override
+    public String getDescriptionBundle() {
+        return AdminConstants.ADMIN_BUNDLE;
+    }
+
+    @Override
+    public String getDescriptionKey() {
+        return "applications.description";
+    }
+
+    @Override
+    public String getIcon() {
+        return "puzzle";
+    }
+
+    @Override
+    public int getPosition() {
+        return 40;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/applications/DefaultApplicationController.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.applications;
+
+import javax.enterprise.context.RequestScoped;
+import javax.mvc.Controller;
+import javax.ws.rs.Path;
+
+/**
+ * A default implementation of the {@link ApplicationController} used if there
+ * is not implementation of the {@link ApplicationController} interface for an
+ * application.
+ *
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Controller
+@Path("/application")
+public class DefaultApplicationController implements ApplicationController {
+
+    @Override
+    public String getApplication() {
+        return "";
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/applications/package-info.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+/**
+ * UI for managing application instances.
+ */
+package org.libreccm.ui.admin.applications;

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategoriesController.java

@@ -0,0 +1,851 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.libreccm.api.Identifier;
+import org.libreccm.api.IdentifierParser;
+import org.libreccm.categorization.Category;
+import org.libreccm.categorization.CategoryManager;
+import org.libreccm.categorization.CategoryRepository;
+import org.libreccm.categorization.Domain;
+import org.libreccm.categorization.DomainRepository;
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.ui.Message;
+import org.libreccm.ui.MessageType;
+import org.libreccm.ui.admin.AdminMessages;
+
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.Optional;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.mvc.Controller;
+import javax.mvc.Models;
+import javax.transaction.Transactional;
+import javax.ws.rs.Consumes;
+import javax.ws.rs.FormParam;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.core.MediaType;
+
+/**
+ * Primary controller for the UI for managing category systems and categories.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Controller
+@Path("/categorymanager/categories")
+public class CategoriesController {
+
+    @Inject
+    private AdminMessages adminMessages;
+
+    @Inject
+    private CategoryDetailsModel categoryDetailsModel;
+
+    @Inject
+    private CategoryManager categoryManager;
+
+    @Inject
+    private CategoryRepository categoryRepository;
+
+    @Inject
+    private DomainRepository domainRepository;
+
+    @Inject
+    private IdentifierParser identifierParser;
+
+    @Inject
+    private Models models;
+
+    /**
+     * Show details about a category.
+     *
+     * @param categoryIdentifier Identifier of the category to show.
+     *
+     * @return The template to render.
+     */
+    @GET
+    @Path("/{categoryIdentifier}")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String getCategory(
+        @PathParam("categoryIdentifier") final String categoryIdentifier
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            categoryIdentifier
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            categoryDetailsModel.setCategory(result.get());
+            return "org/libreccm/ui/admin/categories/category-details.xhtml";
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifier)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Show the edit form for a category.
+     *
+     * @param categoryIdentifier Identifier of the category to edit.
+     *
+     * @return The template to render.
+     */
+    @GET
+    @Path("/{categoryIdentifier}/edit")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String editCategory(
+        @PathParam("categoryIdentifier") final String categoryIdentifier
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            categoryIdentifier
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            categoryDetailsModel.setCategory(result.get());
+            return "org/libreccm/ui/admin/categories/category-form.xhtml";
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifier)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Displays the form for creating a new subcategory.
+     *
+     * @param categoryIdentifier The identifier of the parent category.
+     *
+     * @return The template to render.
+     */
+    @GET
+    @Path("/{categoryIdentifier}/subcategories/new")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String newSubCategory(
+        @PathParam("categoryIdentifier") final String categoryIdentifier
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            categoryIdentifier
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            categoryDetailsModel.setParentCategory(result.get());
+            return "org/libreccm/ui/admin/categories/category-form.xhtml";
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifier)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Moves a category from one parent category to another. The target is
+     * provided
+     *
+     * @param categoryIdentifierParam Identifier of the category to move.
+     * @param targetIdentifierParam   Identifier of the target category.
+     *
+     * @return Redirect to the detail page of the target category.
+     */
+    @POST
+    @Path("/{categoryIdentifier}/subcategories/move")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String moveSubCategory(
+        @PathParam("categoryIdentifier") final String categoryIdentifierParam,
+        @FormParam("targetIdentifier") final String targetIdentifierParam
+    ) {
+        final Identifier categoryIdentifier = identifierParser.parseIdentifier(
+            categoryIdentifierParam
+        );
+        final Optional<Category> categoryResult;
+        switch (categoryIdentifier.getType()) {
+            case ID:
+                categoryResult = categoryRepository.findById(
+                    Long.parseLong(categoryIdentifier.getIdentifier())
+                );
+                break;
+            default:
+                categoryResult = categoryRepository.findByUuid(
+                    categoryIdentifier.getIdentifier()
+                );
+                break;
+        }
+        if (!categoryResult.isPresent()) {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+
+        final Identifier targetIdentifier = identifierParser.parseIdentifier(
+            targetIdentifierParam
+        );
+
+        final Optional<Category> targetResult;
+        switch (targetIdentifier.getType()) {
+            case ID:
+                targetResult = categoryRepository.findById(
+                    Long.parseLong(targetIdentifier.getIdentifier())
+                );
+                break;
+            default:
+                targetResult = categoryRepository.findByUuid(
+                    targetIdentifier.getIdentifier()
+                );
+                break;
+        }
+        if (!categoryResult.isPresent()) {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(targetIdentifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+
+        final Category category = categoryResult.get();
+        final Category oldParent = category.getParentCategory();
+        if (oldParent == null) {
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        }
+        final Category target = targetResult.get();
+
+        categoryManager.removeSubCategoryFromCategory(category, oldParent);
+        categoryManager.addSubCategoryToCategory(category, target);
+
+        return String.format(
+            "redirect:categorymanager/categories/ID-%d", target.getObjectId()
+        );
+    }
+
+    /**
+     * Deletes a category.
+     *
+     * @param categoryIdentifier Identifier of the category to remove.
+     *
+     * @return Redirect to the details page of the parent category of the
+     *         removed category.
+     */
+    @POST
+    @Path("/{categoryIdentifier}/subcategories/remove")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String removeSubCategory(
+        @PathParam("categoryIdentifier") final String categoryIdentifier
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            categoryIdentifier
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+            final Category parentCategory = category.getParentCategory();
+            if (parentCategory == null) {
+                return String.format(
+                    "redirect:categorymanager/categories/ID-%d",
+                    category.getObjectId()
+                );
+            }
+            categoryManager.removeSubCategoryFromCategory(category,
+                                                          parentCategory
+            );
+            categoryRepository.delete(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                parentCategory.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifier)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Adds a localized title the a category.
+     *
+     * @param identifierParam Identifier of the category.
+     * @param localeParam     The locale of the title.
+     * @param value           The localized title.
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{identifier}/title/add")
+    @AuthorizationRequired
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String addTitle(
+        @PathParam("identifier") final String identifierParam,
+        @FormParam("locale") final String localeParam,
+        @FormParam("value") final String value
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            identifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+
+            final Locale locale = new Locale(localeParam);
+            category.getTitle().addValue(locale, value);
+            categoryRepository.save(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(identifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Updates the localized title of a category.
+     *
+     * @param identifierParam Identifier of the category.
+     * @param localeParam     The locale of the title.
+     * @param value           The localized title.
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{identifier}/title/{locale}/edit")
+    @AuthorizationRequired
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String editTitle(
+        @PathParam("identifier") final String identifierParam,
+        @PathParam("locale") final String localeParam,
+        @FormParam("value") final String value
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            identifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+
+            final Locale locale = new Locale(localeParam);
+            category.getTitle().addValue(locale, value);
+            categoryRepository.save(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(identifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Removes the localized title of a category.
+     *
+     * @param categoryIdentifierParam Identifier of the category.
+     * @param localeParam             The locale of the title.
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{identifier}/title/{locale}/remove")
+    @AuthorizationRequired
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String removeTitle(
+        @PathParam("identifier")
+        final String categoryIdentifierParam,
+        @PathParam("locale") final String localeParam
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            categoryIdentifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+
+            final Locale locale = new Locale(localeParam);
+            category.getTitle().removeValue(locale);
+            categoryRepository.save(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Adds a localized description the a category.
+     *
+     * @param identifierParam Identifier of the category.
+     * @param localeParam     The locale of the description
+     * @param value           The localized description.
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{identifier}decsription/add")
+    @AuthorizationRequired
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String addDescription(
+        @PathParam("identifier") final String identifierParam,
+        @FormParam("locale") final String localeParam,
+        @FormParam("value") final String value
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            identifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+
+            final Locale locale = new Locale(localeParam);
+            category.getDescription().addValue(locale, value);
+            categoryRepository.save(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(identifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Updates the localized description the a category.
+     *
+     * @param identifierParam Identifier of the category.
+     * @param localeParam     The locale of the description
+     * @param value           The localized description.
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{identifier}/description/{locale}/edit")
+    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
+    @AuthorizationRequired
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String editDescription(
+        @PathParam("identifier") final String identifierParam,
+        @PathParam("locale") final String localeParam,
+        @FormParam("value") final String value
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            identifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+
+            final Locale locale = new Locale(localeParam);
+            category.getDescription().addValue(locale, value);
+            categoryRepository.save(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(identifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Removes a localized description the a category.
+     *
+     * @param identifierParam Identifier of the category.
+     * @param localeParam     The locale of the description
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{identifier}/description/{locale}/remove")
+    @AuthorizationRequired
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String removeDescription(
+        @PathParam("identifier") final String identifierParam,
+        @PathParam("locale") final String localeParam
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            identifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+
+            final Locale locale = new Locale(localeParam);
+            category.getDescription().removeValue(locale);
+            categoryRepository.save(category);
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(identifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Changes the order of the subcategories of a category.
+     *
+     * @param categoryIdentifierParam    Identifier of the category.
+     * @param subCategoryIdentifierParam Identifier of the sub category to move.
+     * @param direction                  The direction, either
+     *                                   {@code INCREASE or DECREASE}.
+     *
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{categoryIdentifier}/subcategories/{subCategoryIdentifier}/reorder")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String reorderSubCategory(
+        @PathParam("categoryIdentifier") final String categoryIdentifierParam,
+        @PathParam("subCategoryIdentifier") final String subCategoryIdentifierParam,
+        @FormParam("direction") final String direction
+    ) {
+        final Identifier categoryIdentifier = identifierParser.parseIdentifier(
+            categoryIdentifierParam
+        );
+        final Identifier subCategoryIdentifier = identifierParser
+            .parseIdentifier(subCategoryIdentifierParam);
+
+        final Optional<Category> categoryResult;
+        switch (categoryIdentifier.getType()) {
+            case ID:
+                categoryResult = categoryRepository.findById(
+                    Long.parseLong(categoryIdentifier.getIdentifier())
+                );
+                break;
+            default:
+                categoryResult = categoryRepository.findByUuid(
+                    categoryIdentifier.getIdentifier()
+                );
+                break;
+        }
+        final Category category;
+        if (categoryResult.isPresent()) {
+            category = categoryResult.get();
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+
+        final Optional<Category> subCategoryResult;
+        switch (subCategoryIdentifier.getType()) {
+            case ID:
+                subCategoryResult = categoryRepository.findById(
+                    Long.parseLong(subCategoryIdentifier.getIdentifier())
+                );
+                break;
+            default:
+                subCategoryResult = categoryRepository.findByUuid(
+                    subCategoryIdentifier.getIdentifier()
+                );
+                break;
+        }
+        final Category subCategory;
+        if (subCategoryResult.isPresent()) {
+            subCategory = subCategoryResult.get();
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(subCategoryIdentifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+
+        switch (direction) {
+            case "DECREASE":
+                categoryManager.decreaseCategoryOrder(subCategory, category);
+                break;
+            case "INCREASE":
+                categoryManager.increaseCategoryOrder(subCategory, category);
+                break;
+            default:
+                categoryDetailsModel.addMessage(
+                    new Message(
+                        adminMessages.getMessage(
+                            "categories.invalid_direction.message",
+                            Arrays.asList(direction)),
+                        MessageType.WARNING
+                    )
+                );
+        }
+
+        if (category.getParentCategory() == null) {
+            final Optional<Domain> categorySystem = domainRepository
+                .findByRootCategory(category);
+            if (categorySystem.isPresent()) {
+                return String.format(
+                    "redirect:categorymanager/categorysystems/ID-%d/details",
+                    categorySystem.get().getObjectId()
+                );
+            } else {
+                return String.format(
+                    "redirect:categorymanager/categories/ID-%d",
+                    category.getObjectId()
+                );
+            }
+        } else {
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategoriesPage.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.libreccm.ui.admin.AdminConstants;
+import org.libreccm.ui.admin.AdminPage;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.enterprise.context.ApplicationScoped;
+
+/**
+ * {@link AdminPage} implementation for the UI for managing categories. 
+ * 
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@ApplicationScoped
+public class CategoriesPage implements AdminPage {
+
+    @Override
+    public Set<Class<?>> getControllerClasses() {
+        final Set<Class<?>> classes = new HashSet<>();
+        classes.add(CategorySystemsController.class);
+        classes.add(CategorySystemFormController.class);
+        classes.add(CategoriesController.class);
+        classes.add(CategoryFormController.class);
+        return classes;
+    }
+
+    @Override
+    public String getUriIdentifier() {
+        return String.format(
+            "%s#getCategorySystems", 
+            CategorySystemsController.class.getSimpleName()
+        );
+    }
+
+    @Override
+    public String getLabelBundle() {
+        return AdminConstants.ADMIN_BUNDLE;
+    }
+
+    @Override
+    public String getLabelKey() {
+        return "categories.label";
+    }
+
+    @Override
+    public String getDescriptionBundle() {
+       return AdminConstants.ADMIN_BUNDLE;
+    }
+
+    @Override
+    public String getDescriptionKey() {
+        return "categories.description";
+    }
+
+    @Override
+    public String getIcon() {
+        return "diagram-3-fill";
+    }
+
+    @Override
+    public int getPosition() {
+        return 20;
+    }
+    
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategoryDetailsModel.java

@@ -0,0 +1,327 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.libreccm.categorization.Category;
+import org.libreccm.categorization.CategoryManager;
+import org.libreccm.categorization.Domain;
+import org.libreccm.categorization.DomainRepository;
+import org.libreccm.l10n.GlobalizationHelper;
+import org.libreccm.ui.Message;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.inject.Named;
+import javax.transaction.Transactional;
+
+/**
+ * Model for the details of a category.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Named("CategoryDetailsModel")
+public class CategoryDetailsModel {
+
+    @Inject
+    private CategoryManager categoryManager;
+
+    @Inject
+    private DomainRepository domainRepository;
+    
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    private long categoryId;
+
+    private String uuid;
+
+    private String uniqueId;
+
+    private String name;
+
+    private String path;
+
+    private Map<String, String> title;
+
+    private List<String> unusedTitleLocales;
+
+    private Map<String, String> description;
+
+    private List<String> unusedDescriptionLocales;
+
+    private boolean enabled;
+
+    private boolean visible;
+
+    private boolean abstractCategory;
+
+    private List<CategoryNodeModel> subCategories;
+
+    private CategoryNodeModel parentCategory;
+
+    private CategoryPathModel categoryPath;
+
+    private long categoryOrder;
+
+    private final List<Message> messages;
+
+    private Set<String> invalidFields;
+
+    public CategoryDetailsModel() {
+        this.messages = new ArrayList<>();
+    }
+
+    public long getCategoryId() {
+        return categoryId;
+    }
+
+    public String getIdentifier() {
+        return String.format("ID-%d", categoryId);
+    }
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    public String getUniqueId() {
+        return uniqueId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getPath() {
+        return path;
+    }
+
+    public Map<String, String> getTitle() {
+        return Collections.unmodifiableMap(title);
+    }
+
+    public List<String> getUnusedTitleLocales() {
+        return Collections.unmodifiableList(unusedTitleLocales);
+    }
+
+    public boolean hasUnusedTitleLocales() {
+        return !unusedTitleLocales.isEmpty();
+    }
+
+    public Map<String, String> getDescription() {
+        return Collections.unmodifiableMap(description);
+    }
+
+    public List<String> getUnusedDescriptionLocales() {
+        return Collections.unmodifiableList(unusedDescriptionLocales);
+    }
+
+    public boolean hasUnusedDescriptionLocales() {
+        return !unusedDescriptionLocales.isEmpty();
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    public boolean isVisible() {
+        return visible;
+    }
+
+    public boolean isAbstractCategory() {
+        return abstractCategory;
+    }
+
+    public List<CategoryNodeModel> getSubCategories() {
+        return Collections.unmodifiableList(subCategories);
+    }
+
+    public CategoryNodeModel getParentCategory() {
+        return parentCategory;
+    }
+
+    protected void setParentCategory(final Category parent) {
+        parentCategory = buildCategoryNodeModel(parent);
+    }
+
+    public CategoryPathModel getCategoryPath() {
+        return categoryPath;
+    }
+
+    public long getCategoryOrder() {
+        return categoryOrder;
+    }
+
+    public boolean isNew() {
+        return categoryId == 0;
+    }
+
+    public List<Message> getMessages() {
+        return Collections.unmodifiableList(messages);
+    }
+
+    public void addMessage(final Message message) {
+        messages.add(message);
+    }
+
+    public Set<String> getInvalidFields() {
+        return Collections.unmodifiableSet(invalidFields);
+    }
+
+    protected void addInvalidField(final String invalidField) {
+        invalidFields.add(invalidField);
+    }
+
+    protected void setInvalidFields(final Set<String> invalidFields) {
+        this.invalidFields = new HashSet<>(invalidFields);
+    }
+
+    /**
+     * Sets the model to the properties of the provided category.
+     * 
+     * @param category The category.
+     */
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected void setCategory(final Category category) {
+        Objects.requireNonNull(category);
+
+        categoryId = category.getObjectId();
+        uuid = category.getUuid();
+        uniqueId = category.getUniqueId();
+        name = category.getName();
+        path = categoryManager.getCategoryPath(category);
+
+        final List<Locale> availableLocales = globalizationHelper
+            .getAvailableLocales();
+        title = category
+            .getTitle()
+            .getValues()
+            .entrySet()
+            .stream()
+            .collect(
+                Collectors.toMap(
+                    entry -> entry.getKey().toString(),
+                    entry -> entry.getValue()
+                )
+            );
+        final Set<Locale> titleLocales = category
+            .getTitle()
+            .getAvailableLocales();
+        unusedTitleLocales = availableLocales
+            .stream()
+            .filter(locale -> !titleLocales.contains(locale))
+            .map(Locale::toString)
+            .sorted()
+            .collect(Collectors.toList());
+
+        description = category
+            .getDescription()
+            .getValues()
+            .entrySet()
+            .stream()
+            .collect(
+                Collectors.toMap(
+                    entry -> entry.getKey().toString(),
+                    entry -> entry.getValue()
+                )
+            );
+        final Set<Locale> descriptionLocales = category
+            .getDescription()
+            .getAvailableLocales();
+        unusedDescriptionLocales = availableLocales
+            .stream()
+            .filter(locale -> !descriptionLocales.contains(locale))
+            .map(Locale::toString)
+            .sorted()
+            .collect(Collectors.toList());
+
+        enabled = category.isEnabled();
+        visible = category.isVisible();
+        abstractCategory = category.isAbstractCategory();
+        subCategories = category
+            .getSubCategories()
+            .stream()
+            .map(this::buildCategoryNodeModel)
+            .sorted()
+            .collect(Collectors.toList());
+        if (category.getParentCategory() != null) {
+            parentCategory
+                = buildCategoryNodeModel(category.getParentCategory());
+        }
+        categoryPath = buildCategoryPathModel(category);
+        categoryOrder = category.getCategoryOrder();
+    }
+
+    private DomainNodeModel buildDomainNodeModel(final Domain domain) {
+        final DomainNodeModel model = new DomainNodeModel();
+        model.setDomainId(domain.getObjectId());
+        model.setUuid(domain.getUuid());
+        model.setDomainKey(domain.getDomainKey());
+
+        return model;
+    }
+
+    private CategoryNodeModel buildCategoryNodeModel(final Category category) {
+        final CategoryNodeModel model = new CategoryNodeModel();
+        model.setCategoryId(category.getObjectId());
+        model.setUuid(category.getUuid());
+        model.setUniqueId(category.getUniqueId());
+        model.setName(category.getName());
+        model.setPath(categoryManager.getCategoryPath(category));
+        model.setCategoryOrder(category.getCategoryOrder());
+        model.setEnabled(category.isEnabled());
+        model.setVisible(category.isVisible());
+        model.setAbstractCategory(category.isAbstractCategory());
+        return model;
+    }
+
+    private CategoryPathModel buildCategoryPathModel(final Category category) {
+        return buildCategoryPathModel(category, new CategoryPathModel());
+    }
+
+    private CategoryPathModel buildCategoryPathModel(
+        final Category category,
+        final CategoryPathModel categoryPathModel
+    ) {
+        categoryPathModel.addCategoryAtBegin(buildCategoryNodeModel(category));
+        final Category parent = category.getParentCategory();
+        if (parent == null) {
+            final Optional<Domain> domain = domainRepository
+                .findByRootCategory(category);
+            if (domain.isPresent()) {
+                categoryPathModel.setDomain(buildDomainNodeModel(domain.get()));
+            }
+            return categoryPathModel;
+        } else {
+            return buildCategoryPathModel(parent, categoryPathModel);
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategoryFormController.java

@@ -0,0 +1,230 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.libreccm.api.Identifier;
+import org.libreccm.api.IdentifierParser;
+import org.libreccm.categorization.Category;
+import org.libreccm.categorization.CategoryManager;
+import org.libreccm.categorization.CategoryRepository;
+import org.libreccm.categorization.Domain;
+import org.libreccm.categorization.DomainRepository;
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.ui.Message;
+import org.libreccm.ui.MessageType;
+import org.libreccm.ui.admin.AdminMessages;
+
+import java.util.Arrays;
+import java.util.Optional;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.mvc.Controller;
+import javax.transaction.Transactional;
+import javax.ws.rs.FormParam;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+
+/**
+ * Controller processing the POST requests from the form for creating and
+ * editing categories.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Controller
+@Path("/categorymanager/categories")
+public class CategoryFormController {
+
+    @Inject
+    private AdminMessages adminMessages;
+
+    @Inject
+    private CategoryDetailsModel categoryDetailsModel;
+
+    @Inject
+    private CategoryManager categoryManager;
+
+    @Inject
+    private CategoryRepository categoryRepository;
+
+    @Inject
+    private DomainRepository domainRepository;
+
+    @Inject
+    private IdentifierParser identifierParser;
+
+    @FormParam("uniqueId")
+    private String uniqueId;
+
+    @FormParam("name")
+    private String name;
+
+    @FormParam("enabled")
+    private String enabled;
+
+    @FormParam("visible")
+    private String visible;
+
+    @FormParam("abstractCategory")
+    private String abstractCategory;
+
+    /**
+     * Create a new category.
+     * 
+     * @param parentCategoryIdentifier Identifier of the parent category.
+     * @return Redirect to the details page of the parent category.
+     */
+    @POST
+    @Path("/{parentCategoryIdentifier}/new")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String createCategory(
+        @PathParam("parentCategoryIdentifier") final String parentCategoryIdentifier
+    ) {
+        final Identifier parentIdentifier = identifierParser.parseIdentifier(
+            parentCategoryIdentifier
+        );
+        final Optional<Category> parentResult;
+        switch (parentIdentifier.getType()) {
+            case ID:
+                parentResult = categoryRepository.findById(
+                    Long.parseLong(
+                        parentIdentifier.getIdentifier()
+                    )
+                );
+                break;
+            default:
+                parentResult = categoryRepository.findByUuid(
+                    parentIdentifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (parentResult.isPresent()) {
+            final Category parentCategory = parentResult.get();
+            final Category category = new Category();
+            category.setUniqueId(uniqueId);
+            category.setName(name);
+            category.setEnabled(enabled != null);
+            category.setVisible(visible != null);
+            category.setAbstractCategory(abstractCategory != null);
+
+            categoryRepository.save(category);
+            categoryManager.addSubCategoryToCategory(category, parentCategory);
+
+            if (parentCategory.getParentCategory() == null) {
+                final Optional<Domain> categorySystem = domainRepository
+                    .findByRootCategory(parentCategory);
+                if (categorySystem.isPresent()) {
+                    return String.format(
+                        "redirect:categorymanager/categorysystems/ID-%d/details",
+                        categorySystem.get().getObjectId()
+                    );
+                } else {
+                    return String.format(
+                        "redirect:categorymanager/categories/ID-%d",
+                        parentCategory.getObjectId()
+                    );
+                }
+            } else {
+                return String.format(
+                    "redirect:categorymanager/categories/ID-%d",
+                    parentCategory.getObjectId()
+                );
+            }
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(parentCategoryIdentifier)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Updates a category with the data from the form.
+     * 
+     * @param categoryIdentifierParam Identifier of the category to update.
+     * @return Redirect to the details page of the category.
+     */
+    @POST
+    @Path("/{categoryIdentifier}/edit")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String updateCategory(
+        @PathParam("categoryIdentifier")
+        final String categoryIdentifierParam
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            categoryIdentifierParam
+        );
+        final Optional<Category> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = categoryRepository.findById(
+                    Long.parseLong(
+                        identifier.getIdentifier()
+                    )
+                );
+                break;
+            default:
+                result = categoryRepository.findByUuid(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            final Category category = result.get();
+            category.setUniqueId(uniqueId);
+            category.setName(name);
+            category.setEnabled(enabled != null);
+            category.setVisible(visible != null);
+            category.setAbstractCategory(abstractCategory != null);
+
+            categoryRepository.save(category);
+
+            return String.format(
+                "redirect:categorymanager/categories/ID-%d",
+                category.getObjectId()
+            );
+        } else {
+            categoryDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categories.not_found.message",
+                        Arrays.asList(categoryIdentifierParam)
+                    ), MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/category-not-found.xhtml";
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategoryNodeModel.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import java.util.Objects;
+
+/**
+ * A DTO with the of a category shown in the UI.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class CategoryNodeModel implements Comparable<CategoryNodeModel> {
+
+    private long categoryId;
+
+    private String uuid;
+
+    private String uniqueId;
+
+    private String name;
+
+    private String path;
+
+    private boolean enabled;
+
+    private boolean visible;
+
+    private boolean abstractCategory;
+
+    private long categoryOrder;
+
+    public long getCategoryId() {
+        return categoryId;
+    }
+
+    protected void setCategoryId(final long categoryId) {
+        this.categoryId = categoryId;
+    }
+
+    public String getIdentifier() {
+        return String.format("ID-%d", categoryId);
+    }
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    protected void setUuid(final String uuid) {
+        this.uuid = uuid;
+    }
+
+    public String getUniqueId() {
+        return uniqueId;
+    }
+
+    protected void setUniqueId(final String uniqueId) {
+        this.uniqueId = uniqueId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    protected void setName(final String name) {
+        this.name = name;
+    }
+
+    public String getPath() {
+        return path;
+    }
+
+    protected void setPath(final String path) {
+        this.path = path;
+    }
+
+    public long getCategoryOrder() {
+        return categoryOrder;
+    }
+
+    protected void setCategoryOrder(final long categoryOrder) {
+        this.categoryOrder = categoryOrder;
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    protected void setEnabled(final boolean enabled) {
+        this.enabled = enabled;
+    }
+
+    public boolean isVisible() {
+        return visible;
+    }
+
+    protected void setVisible(final boolean visible) {
+        this.visible = visible;
+    }
+
+    public boolean isAbstractCategory() {
+        return abstractCategory;
+    }
+
+    protected void setAbstractCategory(final boolean abstractCategory) {
+        this.abstractCategory = abstractCategory;
+    }
+
+    @Override
+    public int compareTo(final CategoryNodeModel other) {
+        int result = Long.compare(
+            categoryOrder,
+            Objects.requireNonNull(other).getCategoryOrder()
+        );
+
+        if (result == 0) {
+            result = Objects.compare(
+                name,
+                Objects.requireNonNull(other).getName(),
+                String::compareTo
+            );
+        }
+
+        return result;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategoryPathModel.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Model for displaying the path of category in the UI.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class CategoryPathModel {
+
+    private DomainNodeModel domain;
+
+    private List<CategoryNodeModel> categories;
+    
+    public CategoryPathModel() {
+        categories = new ArrayList<>();
+    }
+
+    public DomainNodeModel getDomain() {
+        return domain;
+    }
+
+    protected void setDomain(final DomainNodeModel domain) {
+        this.domain = domain;
+    }
+
+    public List<CategoryNodeModel> getCategories() {
+        return Collections.unmodifiableList(categories);
+    }
+
+    protected void addCategory(final CategoryNodeModel category) {
+        categories.add(category);
+    }
+    
+    protected void addCategoryAtBegin(final CategoryNodeModel category) {
+        categories.add(0, category);
+    }
+    
+    protected void setCategories(final List<CategoryNodeModel> categories) {
+        this.categories = new ArrayList<>(categories);
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategorySystemDetailsModel.java

@@ -0,0 +1,362 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.libreccm.categorization.Category;
+import org.libreccm.categorization.CategoryManager;
+import org.libreccm.categorization.Domain;
+import org.libreccm.categorization.DomainOwnership;
+import org.libreccm.l10n.GlobalizationHelper;
+import org.libreccm.ui.Message;
+import org.libreccm.web.ApplicationRepository;
+import org.libreccm.web.CcmApplication;
+
+import java.time.LocalDate;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.inject.Named;
+import javax.transaction.Transactional;
+
+/**
+ * Model for the details of a category system (Domain)
+ * 
+ * @see org.libreccm.categorization.Domain
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Named("CategorySystemDetailsModel")
+public class CategorySystemDetailsModel {
+
+    @Inject
+    private ApplicationRepository applicationRepository;
+
+    @Inject
+    private CategoryManager categoryManager;
+    
+    @Inject
+    private GlobalizationHelper globalizationHelper;
+
+    private long categorySystemId;
+
+    private String uuid;
+
+    private String domainKey;
+
+    private String uri;
+
+    private String version;
+
+    private String released;
+
+    private Map<String, String> title;
+
+    private List<String> unusedTitleLocales;
+
+    private Map<String, String> description;
+
+    private List<String> unusedDescriptionLocales;
+
+    private List<CategorySystemOwnerRow> owners;
+
+    private List<CategorySystemOwnerOption> ownerOptions;
+    
+    private String rootIdentifier;
+    
+    private List<CategoryNodeModel> categories;
+
+    private final List<Message> messages;
+
+    private Set<String> invalidFields;
+
+    public CategorySystemDetailsModel() {
+        messages = new ArrayList<>();
+        invalidFields = new HashSet<>();
+    }
+
+    public long getCategorySystemId() {
+        return categorySystemId;
+    }
+
+    protected void setCategorySystemId(final long categorySystemId) {
+        this.categorySystemId = categorySystemId;
+    }
+
+    public String getIdentifier() {
+        return String.format("ID-%d", categorySystemId);
+    }
+    
+    public String getRootIdentifier() {
+        return rootIdentifier;
+    }
+    
+    protected void setRootIdentifier(final String rootIdentifier) {
+        this.rootIdentifier = rootIdentifier;
+    }
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    protected void setUuid(final String uuid) {
+        this.uuid = uuid;
+    }
+
+    public String getDomainKey() {
+        return domainKey;
+    }
+
+    protected void setDomainKey(final String domainKey) {
+        this.domainKey = domainKey;
+    }
+
+    public String getUri() {
+        return uri;
+    }
+
+    protected void setUri(final String uri) {
+        this.uri = uri;
+    }
+
+    public String getVersion() {
+        return version;
+    }
+
+    protected void setVersion(final String version) {
+        this.version = version;
+    }
+
+    public String getReleased() {
+        return released;
+    }
+
+    protected void setReleased(final String released) {
+        this.released = released;
+    }
+
+    protected void setReleased(final LocalDate released) {
+        if (released == null) {
+            this.released = "";
+        } else {
+            this.released = DateTimeFormatter.ISO_DATE.format(released);
+        }
+    }
+
+    public Map<String, String> getTitle() {
+        return Collections.unmodifiableMap(title);
+    }
+
+    public List<String> getUnusedTitleLocales() {
+        return Collections.unmodifiableList(unusedTitleLocales);
+    }
+
+    public boolean hasUnusedTitleLocales() {
+        return !unusedTitleLocales.isEmpty();
+    }
+
+    public Map<String, String> getDescription() {
+        return Collections.unmodifiableMap(description);
+    }
+
+    public List<String> getUnusedDescriptionLocales() {
+        return Collections.unmodifiableList(unusedDescriptionLocales);
+    }
+
+    public boolean hasUnusedDescriptionLocales() {
+        return !unusedDescriptionLocales.isEmpty();
+    }
+
+    public List<CategorySystemOwnerRow> getOwners() {
+        return Collections.unmodifiableList(owners);
+    }
+
+    public List<CategorySystemOwnerOption> getOwnerOptions() {
+        return Collections.unmodifiableList(ownerOptions);
+    }
+
+    public List<CategoryNodeModel> getCategories() {
+        return Collections.unmodifiableList(categories);
+    }
+    
+    public boolean isNew() {
+        return categorySystemId == 0;
+    }
+
+    public List<Message> getMessages() {
+        return Collections.unmodifiableList(messages);
+    }
+
+    public void addMessage(final Message message) {
+        messages.add(message);
+    }
+
+    public Set<String> getInvalidFields() {
+        return Collections.unmodifiableSet(invalidFields);
+    }
+
+    protected void addInvalidField(final String invalidField) {
+        invalidFields.add(invalidField);
+    }
+
+    protected void setInvalidFields(final Set<String> invalidFields) {
+        this.invalidFields = new HashSet<>(invalidFields);
+    }
+
+    /**
+     * Sets the properties of this model using the provided {@link Domain}.
+     * @param domain The domain to display.
+     */
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected void setCategorySystem(final Domain domain) {
+        Objects.requireNonNull(domain);
+
+        categorySystemId = domain.getObjectId();
+        uuid = domain.getUuid();
+        domainKey = domain.getDomainKey();
+        uri = domain.getUri();
+        version = domain.getVersion();
+        if (domain.getReleased() == null) {
+            released = "";
+        } else {
+            released = DateTimeFormatter.ISO_DATE
+                .withZone(ZoneOffset.systemDefault())
+                .format(domain.getReleased());
+        }
+       
+        final List<Locale> availableLocales = globalizationHelper
+            .getAvailableLocales();
+        title = domain
+            .getTitle()
+            .getValues()
+            .entrySet()
+            .stream()
+            .collect(
+                Collectors.toMap(
+                    entry -> entry.getKey().toString(),
+                    entry -> entry.getValue()
+                )
+            );
+        final Set<Locale> titleLocales = domain
+            .getTitle()
+            .getAvailableLocales();
+        unusedTitleLocales = availableLocales
+            .stream()
+            .filter(locale -> !titleLocales.contains(locale))
+            .map(Locale::toString)
+            .sorted()
+            .collect(Collectors.toList());
+
+        description = domain
+            .getDescription()
+            .getValues()
+            .entrySet()
+            .stream()
+            .collect(
+                Collectors.toMap(
+                    entry -> entry.getKey().toString(),
+                    entry -> entry.getValue()
+                )
+            );
+        final Set<Locale> descriptionLocales = domain
+            .getDescription()
+            .getAvailableLocales();
+        unusedDescriptionLocales = availableLocales
+            .stream()
+            .filter(locale -> !descriptionLocales.contains(locale))
+            .map(Locale::toString)
+            .sorted()
+            .collect(Collectors.toList());
+
+        owners = domain
+            .getOwners()
+            .stream()
+            .map(this::buildOwnerRow)
+            .sorted()
+            .collect(Collectors.toList());
+
+        final List<CcmApplication> ownerApplications = domain
+            .getOwners()
+            .stream()
+            .map(DomainOwnership::getOwner)
+            .collect(Collectors.toList());
+
+        ownerOptions = applicationRepository
+            .findAll()
+            .stream()
+            .filter(application -> !ownerApplications.contains(application))
+            .map(CategorySystemOwnerOption::new)
+            .sorted()
+            .collect(Collectors.toList());
+        
+
+        rootIdentifier = String.format("UUID-%s", domain.getRoot().getUuid());
+        
+        categories = domain
+            .getRoot()
+            .getSubCategories()
+            .stream()
+            .map(this::buildCategoryTableRow)
+            .sorted()
+            .collect(Collectors.toList());
+    }
+
+    private CategorySystemOwnerRow buildOwnerRow(
+        final DomainOwnership ownership
+    ) {
+        final CategorySystemOwnerRow ownerRow = new CategorySystemOwnerRow();
+        ownerRow.setOwnershipId(ownership.getOwnershipId());
+        ownerRow.setUuid(ownership.getOwner().getUuid());
+        ownerRow.setContext(ownership.getContext());
+        ownerRow.setOwnerOrder(ownership.getOwnerOrder());
+        if (ownership.getOwner().getDisplayName() == null) {
+            ownerRow.setOwnerAppName(ownership.getOwner().getApplicationType());
+        } else {
+            ownerRow.setOwnerAppName(ownership.getOwner().getDisplayName());
+        }
+
+        return ownerRow;
+    }
+    
+    private CategoryNodeModel buildCategoryTableRow(final Category category) {
+        final CategoryNodeModel row = new CategoryNodeModel();
+        row.setCategoryId(category.getObjectId());
+        row.setUuid(category.getUuid());
+        row.setUniqueId(category.getUniqueId());
+        row.setName(category.getName());
+        row.setPath(categoryManager.getCategoryPath(category));
+        row.setEnabled(category.isEnabled());
+        row.setVisible(category.isVisible());
+        row.setAbstractCategory(category.isAbstractCategory());
+        row.setCategoryOrder(category.getCategoryOrder());
+        return row;
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategorySystemFormController.java

@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.apache.commons.validator.routines.UrlValidator;
+import org.libreccm.api.Identifier;
+import org.libreccm.api.IdentifierParser;
+import org.libreccm.categorization.Domain;
+import org.libreccm.categorization.DomainManager;
+import org.libreccm.categorization.DomainRepository;
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.ui.Message;
+import org.libreccm.ui.MessageType;
+import org.libreccm.ui.admin.AdminMessages;
+
+import java.time.LocalDate;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.Optional;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.mvc.Controller;
+import javax.transaction.Transactional;
+import javax.ws.rs.FormParam;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+
+/**
+ * Controller for processing the {@code POST} requests from the form for
+ * creating and editing category systems.
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@Controller
+@Path("/categorymanager/categorysystems")
+@RequestScoped
+public class CategorySystemFormController {
+
+    @Inject
+    private AdminMessages adminMessages;
+
+    @Inject
+    private CategorySystemDetailsModel categorySystemDetailsModel;
+
+    @Inject
+    private DomainManager domainManager;
+
+    @Inject
+    private DomainRepository domainRepository;
+
+    @Inject
+    private IdentifierParser identifierParser;
+
+    @FormParam("domainKey")
+    private String domainKey;
+
+    @FormParam("uri")
+    private String uri;
+
+    @FormParam("version")
+    private String version;
+
+    @FormParam("released")
+    private String released;
+
+    /**
+     * Creates a new category system (domain).
+     *
+     * @return Redirect to the list of category systems.
+     */
+    @POST
+    @Path("/new")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String createCategorySystem() {
+
+        if (!isValidUri()) {
+            categorySystemDetailsModel.setDomainKey(domainKey);
+            categorySystemDetailsModel.setUri(uri);
+            categorySystemDetailsModel.setVersion(version);
+            categorySystemDetailsModel.setReleased(released);
+
+            categorySystemDetailsModel.addMessage(
+                new Message(
+                    adminMessages.get("categorysystems.form.errors.uri_invalid"),
+                    MessageType.DANGER)
+            );
+            categorySystemDetailsModel.addInvalidField("uri");
+            return "org/libreccm/ui/admin/categories/categorysystem-form.xhtml";
+        }
+
+        final Domain domain = domainManager.createDomain(domainKey, domainKey);
+        domain.setUri(uri);
+        domain.setVersion(version);
+        if (released == null || released.isEmpty()) {
+            domain.setReleased(null);
+        } else {
+            domain.setReleased(convertReleased());
+        }
+        domainRepository.save(domain);
+
+        return "redirect:/categorymanager/categorysystems";
+    }
+
+    /**
+     * Update a category with the data from the form.
+     *
+     * @param identifierParam Identifier of the category system to update.
+     *
+     * @return Redirect to the details page of the category system.
+     */
+    @POST
+    @Path("{categorySystemIdentifier}/edit")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Transactional(Transactional.TxType.REQUIRED)
+    public String updateCategorySystem(
+        @PathParam("categorySystemIdentifier")
+        final String identifierParam
+    ) {
+        final Identifier identifier = identifierParser.parseIdentifier(
+            identifierParam
+        );
+        final Optional<Domain> result;
+        switch (identifier.getType()) {
+            case ID:
+                result = domainRepository.findById(
+                    Long.parseLong(identifier.getIdentifier())
+                );
+                break;
+            case UUID:
+                result = domainRepository.findByUuid(identifier.getIdentifier());
+                break;
+            default:
+                result = domainRepository.findByDomainKey(
+                    identifier.getIdentifier()
+                );
+                break;
+        }
+
+        if (result.isPresent()) {
+            if (!isValidUri()) {
+                categorySystemDetailsModel.setDomainKey(domainKey);
+                categorySystemDetailsModel.setUri(uri);
+                categorySystemDetailsModel.setVersion(version);
+                categorySystemDetailsModel.setReleased(released);
+
+                categorySystemDetailsModel.addMessage(
+                    new Message(
+                        adminMessages.get(
+                            "categorysystems.form.errors.uri_invalid"),
+                        MessageType.DANGER)
+                );
+                categorySystemDetailsModel.addInvalidField("uri");
+                return "org/libreccm/ui/admin/categories/categorysystem-form.xhtml";
+            }
+            final Domain domain = result.get();
+            domain.setDomainKey(domainKey);
+            domain.setUri(uri);
+            domain.setVersion(version);
+            if (released == null || released.isEmpty()) {
+                domain.setReleased(null);
+            } else {
+                domain.setReleased(convertReleased());
+            }
+            domainRepository.save(domain);
+
+            return String.format(
+                "redirect:/categorymanager/categorysystems/ID-%d/details",
+                domain.getObjectId()
+            );
+        } else {
+            categorySystemDetailsModel.addMessage(
+                new Message(
+                    adminMessages.getMessage(
+                        "categorysystems.not_found.message",
+                        Arrays.asList(identifierParam)
+                    ),
+                    MessageType.WARNING
+                )
+            );
+            return "org/libreccm/ui/admin/categories/categorysystem-not-found.xhtml";
+        }
+    }
+
+    /**
+     * Helper method for converting the {@link #released} date to an ISO 8601
+     * formatted string.
+     *
+     * @return The released date in ISO 8601 format.
+     */
+    private LocalDate convertReleased() {
+        return LocalDate.parse(
+            released,
+            DateTimeFormatter.ISO_DATE.withZone(ZoneOffset.systemDefault())
+        );
+    }
+
+    /**
+     * Helper method for validating a URI.
+     *
+     * @return {@code true} if the URI is valid, {@code false} otherwise.
+     */
+    private boolean isValidUri() {
+        final UrlValidator urlValidator = new UrlValidator();
+        return urlValidator.isValid(uri);
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategorySystemOwnerOption.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import org.libreccm.web.CcmApplication;
+
+import java.util.Objects;
+
+/**
+ * DTO for the options for selecting the owner applications of a category system. 
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class CategorySystemOwnerOption
+    implements Comparable<CategorySystemOwnerOption> {
+
+    private final long applicationId;
+
+    private final String applicationUuid;
+
+    private final String applicationName;
+
+    public CategorySystemOwnerOption(final CcmApplication application) {
+        applicationId = application.getObjectId();
+        applicationUuid = application.getUuid();
+        if (application.getDisplayName() == null) {
+            applicationName = application.getApplicationType();
+        } else {
+            applicationName = application.getDisplayName();
+        }
+    }
+
+    public long getApplicationId() {
+        return applicationId;
+    }
+
+    public String getApplicationUuid() {
+        return applicationUuid;
+    }
+
+    public String getApplicationName() {
+        return applicationName;
+    }
+
+    @Override
+    public int compareTo(final CategorySystemOwnerOption other) {
+        return Objects.compare(
+            applicationName,
+            Objects.requireNonNull(other).getApplicationName(),
+            String::compareTo
+        );
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategorySystemOwnerRow.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+/**
+ * Data for a row in the table of owner applications of a category system.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class CategorySystemOwnerRow 
+    implements Comparable<CategorySystemOwnerRow>{
+    
+    private long ownershipId;
+    
+    private String uuid;
+    
+    private String ownerAppName;
+    
+    private String context;
+    
+    private long ownerOrder;
+
+    public long getOwnershipId() {
+        return ownershipId;
+    }
+
+    void setOwnershipId(final long ownershipId) {
+        this.ownershipId = ownershipId;
+    }
+
+    public String getUuid() {
+        return uuid;
+    }
+
+    void setUuid(final String uuid) {
+        this.uuid = uuid;
+    }
+
+    public String getOwnerAppName() {
+        return ownerAppName;
+    }
+
+    void setOwnerAppName(final String ownerAppName) {
+        this.ownerAppName = ownerAppName;
+    }
+
+    public String getContext() {
+        return context;
+    }
+
+    void setContext(final String context) {
+        this.context = context;
+    }
+
+    public long getOwnerOrder() {
+        return ownerOrder;
+    }
+
+    void setOwnerOrder(final long ownerOrder) {
+        this.ownerOrder = ownerOrder;
+    }
+    
+    @Override
+    public int compareTo(final CategorySystemOwnerRow other) {
+        return Long.compare(ownerOrder, other.getOwnerOrder());
+    }
+    
+}

ccm-core/src/main/java/org/libreccm/ui/admin/categories/CategorySystemTableRow.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui.admin.categories;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * Data for a row in the table of category systems.
+ * 
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class CategorySystemTableRow implements
+    Comparable<CategorySystemTableRow> {
+
+    private long domainId;
+
+    private String domainKey;
+
+    private String uri;
+
+    private Map<String, String> title;
+
+    private String version;
+
+    private String released;
+
+    public long getDomainId() {
+        return domainId;
+    }
+
+    void setDomainId(final long domainId) {
+        this.domainId = domainId;
+    }
+
+    public String getIdentifier() {
+        return String.format("ID-%d", domainId);
+    }
+
+    public String getDomainKey() {
+        return domainKey;
+    }
+
+    void setDomainKey(final String domainKey) {
+        this.domainKey = domainKey;
+    }
+
+    public String getUri() {
+        return uri;
+    }
+
+    void setUri(final String uri) {
+        this.uri = uri;
+    }
+
+    public Map<String, String> getTitle() {
+        return Collections.unmodifiableMap(title);
+    }
+
+    void setTitle(final Map<String, String> title) {
+        this.title = new HashMap<>(title);
+    }
+
+    public String getVersion() {
+        return version;
+    }
+
+    void setVersion(final String version) {
+        this.version = version;
+    }
+
+    public String getReleased() {
+        return released;
+    }
+
+    void setReleased(final String released) {
+        this.released = released;
+    }
+
+    @Override
+    public int compareTo(final CategorySystemTableRow other) {
+        int result;
+        result = Objects.compare(
+            domainKey, other.getDomainKey(), String::compareTo
+        );
+
+        if (result == 0) {
+            result = Objects.compare(uri, uri, String::compareTo);
+        }
+
+        if (result == 0) {
+            result = Objects.compare(
+                domainId, other.getDomainId(), Long::compare
+            );
+        }
+
+        return result;
+    }
+
+}