CCM NG: Current status of UI for the configuration system

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@4055 8810af33-2d31-482b-a856-94f89814c4df

ccm-core/pom.xml

@@ -351,6 +351,44 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>de.jpdigital</groupId>
+                <artifactId>hibernate5-ddl-maven-plugin</artifactId>
+                <version>1.0.0</version>
+                <configuration>
+                    <outputDirectory>target/generated-resources/hibernate5/sql/ddl/auto</outputDirectory>
+                    <dialects>
+                        <param>h2</param>
+                        <!--<param>mysql5_innodb</param>-->
+                        <param>oracle10g</param>
+                        <param>postgresql9</param>
+                    </dialects>
+                    <packages>
+                        <param>org.libreccm.categorization</param>
+                        <param>org.libreccm.core</param>
+                        <param>org.libreccm.formbuilder</param>
+                        <param>org.libreccm.jpa</param>
+                        <param>org.libreccm.l10n</param>
+                        <param>org.libreccm.messaging</param>
+                        <param>org.libreccm.notification</param>
+                        <param>org.libreccm.portal</param>
+                        <param>org.libreccm.runtime</param>
+                        <param>org.libreccm.search.lucene</param>
+                        <param>org.libreccm.web</param>
+                        <param>org.libreccm.workflow</param>
+                    </packages>
+                    <persistenceXml>${basedir}/src/main/resources/META-INF/persistence-ddl.xml</persistenceXml>
+                    <useEnvers>true</useEnvers>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>gen-ddl</goal>
+                        </goals>
+                        <phase>process-classes</phase>
+                    </execution>
+                </executions>
+            </plugin>
             <!--<plugin>
                 <groupId>org.jboss.tattletale</groupId>
                 <artifactId>tattletale-maven</artifactId>

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/AbstractSettingForm.java

@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2016 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 com.arsdigita.ui.admin.configuration;
+
+import com.arsdigita.bebop.BoxPanel;
+import com.arsdigita.bebop.Form;
+import com.arsdigita.bebop.Label;
+import com.arsdigita.bebop.PageState;
+import com.arsdigita.bebop.ParameterSingleSelectionModel;
+import com.arsdigita.bebop.Text;
+import com.arsdigita.globalization.GlobalizedMessage;
+import com.arsdigita.util.UncheckedWrapperException;
+import org.libreccm.cdi.utils.CdiUtil;
+import org.libreccm.configuration.ConfigurationInfo;
+import org.libreccm.configuration.ConfigurationManager;
+import org.libreccm.configuration.SettingInfo;
+import org.libreccm.configuration.SettingManager;
+import org.libreccm.l10n.GlobalizationHelper;
+
+import static com.arsdigita.ui.admin.AdminUiConstants.*;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public abstract class AbstractSettingForm extends Form {
+
+    public AbstractSettingForm(
+            final String name,
+            final ConfigurationTab configurationTab,
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting) {
+
+        super(name, new BoxPanel(BoxPanel.VERTICAL));
+
+        final Label heading = new Label(e -> {
+            final PageState state = e.getPageState();
+            final Label target = (Label) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+            final SettingManager settingManager = cdiUtil.findBean(
+                    SettingManager.class);
+            final GlobalizationHelper globalizationHelper = cdiUtil
+                    .findBean(GlobalizationHelper.class);
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationInfo confInfo = confManager
+                    .getConfigurationInfo(confClass);
+            final SettingInfo settingInfo = settingManager.getSettingInfo(
+                    confClass, selectedSetting.getSelectedKey(state));
+
+            final String confTitle = confInfo.getTitle(globalizationHelper
+                    .getNegotiatedLocale());
+            final String settingLabel = settingInfo.getLabel(
+                    globalizationHelper.getNegotiatedLocale());
+
+            target.setLabel(new GlobalizedMessage(
+                    "ui.admin.configuration.setting.edit.heading",
+                    ADMIN_BUNDLE,
+                    new String[]{confTitle, settingLabel}));
+        });
+
+        heading.setClassAttr("heading");
+
+        add(heading);
+
+        final Text desc = new Text(e -> {
+            final PageState state = e.getPageState();
+            final Text target = (Text) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+            final SettingManager settingManager = cdiUtil.findBean(
+                    SettingManager.class);
+            final GlobalizationHelper globalizationHelper = cdiUtil
+                    .findBean(GlobalizationHelper.class);
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final SettingInfo settingInfo = settingManager.getSettingInfo(
+                    confClass, selectedSetting.getSelectedKey(state));
+
+            target.setText(settingInfo.getDescription(globalizationHelper
+                    .getNegotiatedLocale()));
+        });
+
+        add(desc);
+
+        addCurrentValuePanel(selectedConf, selectedSetting);
+        
+        
+        
+        
+
+    }
+
+    protected abstract void addCurrentValuePanel(
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting);
+    
+    
+
+}

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/AbstractSettingFormSingleValue.java

@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2016 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 com.arsdigita.ui.admin.configuration;
+
+import com.arsdigita.bebop.BoxPanel;
+import com.arsdigita.bebop.Form;
+import com.arsdigita.bebop.FormData;
+import com.arsdigita.bebop.FormProcessException;
+import com.arsdigita.bebop.PageState;
+import com.arsdigita.bebop.ParameterSingleSelectionModel;
+import com.arsdigita.bebop.SaveCancelSection;
+import com.arsdigita.bebop.event.FormInitListener;
+import com.arsdigita.bebop.event.FormProcessListener;
+import com.arsdigita.bebop.event.FormSectionEvent;
+import com.arsdigita.bebop.event.FormValidationListener;
+import com.arsdigita.bebop.form.TextField;
+import com.arsdigita.globalization.GlobalizedMessage;
+import com.arsdigita.util.UncheckedWrapperException;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.util.Strings;
+import org.libreccm.cdi.utils.CdiUtil;
+import org.libreccm.configuration.ConfigurationManager;
+
+import java.lang.reflect.Field;
+import java.math.BigDecimal;
+
+import static com.arsdigita.ui.admin.AdminUiConstants.*;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ * @param <T>
+ */
+public abstract class AbstractSettingFormSingleValue<T> extends Form {
+
+    private static final Logger LOGGER = LogManager.getLogger(AbstractSettingFormSingleValue.class);
+
+    private static final String VALUE_FIELD = "valueField";
+
+    public AbstractSettingFormSingleValue(
+        final ConfigurationTab configurationTab,
+        final ParameterSingleSelectionModel<String> selectedConf,
+        final ParameterSingleSelectionModel<String> selectedSetting) {
+
+        super("settingFormSingleValue", new BoxPanel(BoxPanel.VERTICAL));
+
+        add(new SettingFormHeader(selectedConf, selectedSetting));
+
+        add(new SettingFormCurrentValuePanel(selectedConf, selectedSetting));
+
+        final TextField valueField = new TextField(VALUE_FIELD);
+        valueField.setLabel(new GlobalizedMessage(
+            "ui.admin.configuration.setting.edit.new_value", ADMIN_BUNDLE));
+        add(valueField);
+
+        final SaveCancelSection saveCancelSection = new SaveCancelSection();
+        add(saveCancelSection);
+
+        addInitListener(new InitListener(selectedConf,
+                                         selectedSetting,
+                                         valueField));
+
+        addValidationListener(new ValidationListener());
+
+        addProcessListener(new ProcessListener(selectedConf, selectedSetting));
+
+    }
+
+    abstract T convertValue(final String valueData);
+
+    private class InitListener implements FormInitListener {
+
+        private final ParameterSingleSelectionModel<String> selectedConf;
+        private final ParameterSingleSelectionModel<String> selectedSetting;
+        private final TextField valueField;
+
+        public InitListener(
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting,
+            final TextField valueField) {
+            this.selectedConf = selectedConf;
+            this.selectedSetting = selectedSetting;
+            this.valueField = valueField;
+        }
+
+        @Override
+        public void init(final FormSectionEvent event)
+            throws FormProcessException {
+
+            final PageState state = event.getPageState();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                    .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                ConfigurationManager.class);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final BigDecimal value;
+            try {
+                value = (BigDecimal) confClass.getField(selectedSetting
+                    .getSelectedKey(state)).get(config);
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
+                LOGGER.warn("Failed to read setting {} from configuration {}",
+                            selectedSetting.getSelectedKey(state),
+                            selectedConf.getSelectedKey(state));
+                LOGGER.warn(ex);
+                return;
+            }
+
+            valueField.setValue(state, value.toString());
+        }
+
+    }
+
+    private class ValidationListener implements FormValidationListener {
+
+        @Override
+        public void validate(final FormSectionEvent event) throws
+            FormProcessException {
+            final FormData data = event.getFormData();
+
+            final String valueData = data.getString(VALUE_FIELD);
+            if (Strings.isBlank(valueData)) {
+                data.addError(VALUE_FIELD,
+                              new GlobalizedMessage(
+                                  "ui.admin.configuration.setting.error.blank",
+                                  ADMIN_BUNDLE));
+            }
+            try {
+                final T value = convertValue(valueData);
+                LOGGER.debug("New value {} is a valid BigDecimal.", value);
+            } catch (NumberFormatException ex) {
+                data.addError(VALUE_FIELD,
+                              new GlobalizedMessage(
+                                  "ui.admin.configuration.setting.error.not_a_bigdecimal",
+                                  ADMIN_BUNDLE));
+            }
+        }
+
+    }
+
+    private class ProcessListener implements FormProcessListener {
+
+        private final ParameterSingleSelectionModel<String> selectedConf;
+        private final ParameterSingleSelectionModel<String> selectedSetting;
+
+        public ProcessListener(
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting) {
+            this.selectedConf = selectedConf;
+            this.selectedSetting = selectedSetting;
+        }
+
+        @Override
+        public void process(final FormSectionEvent event)
+            throws FormProcessException {
+
+            final PageState state = event.getPageState();
+            final FormData data = event.getFormData();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                    .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                ConfigurationManager.class);
+            final String settingName = selectedSetting.getSelectedKey(state);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Field field;
+            try {
+                field = confClass.getField(settingName);
+            } catch (NoSuchFieldException | SecurityException ex) {
+                throw new FormProcessException(
+                    String.format(
+                        "Failed to retrieve field \"%s\" "
+                            + "from configuration class \"%s\".",
+                        settingName,
+                        confClass.getName()),
+                    new GlobalizedMessage(
+                        "ui.admin.configuration.setting.failed_to_set_value",
+                        ADMIN_BUNDLE),
+                    ex);
+            }
+
+            final String valueData = data.getString(VALUE_FIELD);
+
+            final T value = convertValue(valueData);
+
+            try {
+                field.set(config, value);
+            } catch (IllegalArgumentException | IllegalAccessException ex) {
+                throw new FormProcessException(
+                    String.format(
+                        "Failed to change value of field \"%s\" "
+                            + "of configuration class \"%s\".",
+                        settingName,
+                        confClass.getName()),
+                    new GlobalizedMessage(
+                        "ui.admin.configuration.setting.failed_to_set_value",
+                        ADMIN_BUNDLE),
+                    ex);
+            }
+        }
+
+    }
+
+}

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/SettingFormBigDecimal.java

@@ -21,6 +21,7 @@ package com.arsdigita.ui.admin.configuration;
 import com.arsdigita.bebop.BoxPanel;
 import com.arsdigita.bebop.Form;
 import com.arsdigita.bebop.FormData;
+import com.arsdigita.bebop.FormProcessException;
 import com.arsdigita.bebop.GridPanel;
 import com.arsdigita.bebop.Label;
 import com.arsdigita.bebop.PageState;
@@ -30,6 +31,7 @@ import com.arsdigita.bebop.Text;
 import com.arsdigita.bebop.form.TextField;
 import com.arsdigita.globalization.GlobalizedMessage;
 import com.arsdigita.util.UncheckedWrapperException;
+import java.lang.reflect.Field;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -53,14 +55,14 @@ import static com.arsdigita.ui.admin.AdminUiConstants.*;
 public class SettingFormBigDecimal extends Form {
 
     private static final Logger LOGGER = LogManager.getLogger(
-        SettingFormBigDecimal.class);
+            SettingFormBigDecimal.class);
 
     private static final String VALUE_FIELD = "valueField";
 
     public SettingFormBigDecimal(
-        final ConfigurationTab configurationTab,
+            final ConfigurationTab configurationTab,
-        final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedConf,
-        final ParameterSingleSelectionModel<String> selectedSetting) {
+            final ParameterSingleSelectionModel<String> selectedSetting) {
 
         super("settingFormBigDecimal", new BoxPanel(BoxPanel.VERTICAL));
 
@@ -70,34 +72,34 @@ public class SettingFormBigDecimal extends Form {
 
             final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
             final ConfigurationManager confManager = cdiUtil.findBean(
-                ConfigurationManager.class);
+                    ConfigurationManager.class);
             final SettingManager settingManager = cdiUtil.findBean(
-                SettingManager.class);
+                    SettingManager.class);
             final GlobalizationHelper globalizationHelper = cdiUtil
-                .findBean(GlobalizationHelper.class);
+                    .findBean(GlobalizationHelper.class);
 
             final Class<?> confClass;
             try {
                 confClass = Class
-                    .forName(selectedConf.getSelectedKey(state));
+                        .forName(selectedConf.getSelectedKey(state));
             } catch (ClassNotFoundException ex) {
                 throw new UncheckedWrapperException(ex);
             }
 
             final ConfigurationInfo confInfo = confManager
-                .getConfigurationInfo(confClass);
+                    .getConfigurationInfo(confClass);
             final SettingInfo settingInfo = settingManager.getSettingInfo(
-                confClass, selectedSetting.getSelectedKey(state));
+                    confClass, selectedSetting.getSelectedKey(state));
 
             final String confTitle = confInfo.getTitle(globalizationHelper
-                .getNegotiatedLocale());
+                    .getNegotiatedLocale());
             final String settingLabel = settingInfo.getLabel(
-                globalizationHelper.getNegotiatedLocale());
+                    globalizationHelper.getNegotiatedLocale());
 
             target.setLabel(new GlobalizedMessage(
-                "ui.admin.configuration.setting.edit.heading",
+                    "ui.admin.configuration.setting.edit.heading",
-                ADMIN_BUNDLE,
+                    ADMIN_BUNDLE,
-                new String[]{confTitle, settingLabel}));
+                    new String[]{confTitle, settingLabel}));
         });
 
         heading.setClassAttr("heading");
@@ -110,23 +112,23 @@ public class SettingFormBigDecimal extends Form {
 
             final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
             final SettingManager settingManager = cdiUtil.findBean(
-                SettingManager.class);
+                    SettingManager.class);
             final GlobalizationHelper globalizationHelper = cdiUtil
-                .findBean(GlobalizationHelper.class);
+                    .findBean(GlobalizationHelper.class);
 
             final Class<?> confClass;
             try {
                 confClass = Class
-                    .forName(selectedConf.getSelectedKey(state));
+                        .forName(selectedConf.getSelectedKey(state));
             } catch (ClassNotFoundException ex) {
                 throw new UncheckedWrapperException(ex);
             }
 
             final SettingInfo settingInfo = settingManager.getSettingInfo(
-                confClass, selectedSetting.getSelectedKey(state));
+                    confClass, selectedSetting.getSelectedKey(state));
 
             target.setText(settingInfo.getDescription(globalizationHelper
-                .getNegotiatedLocale()));
+                    .getNegotiatedLocale()));
         });
 
         add(desc);
@@ -134,8 +136,8 @@ public class SettingFormBigDecimal extends Form {
         final GridPanel gridPanel = new GridPanel(2);
 
         gridPanel.add(new Label(new GlobalizedMessage(
-            "ui.admin.configuration.setting.edit.current_value",
+                "ui.admin.configuration.setting.edit.current_value",
-            ADMIN_BUNDLE)));
+                ADMIN_BUNDLE)));
 
         gridPanel.add(new Text(e -> {
             final PageState state = e.getPageState();
@@ -146,21 +148,22 @@ public class SettingFormBigDecimal extends Form {
             final Class<?> confClass;
             try {
                 confClass = Class
-                    .forName(selectedConf.getSelectedKey(state));
+                        .forName(selectedConf.getSelectedKey(state));
             } catch (ClassNotFoundException ex) {
                 throw new UncheckedWrapperException(ex);
             }
 
             final ConfigurationManager confManager = cdiUtil.findBean(
-                ConfigurationManager.class);
+                    ConfigurationManager.class);
 
             final Object config = confManager.findConfiguration(confClass);
 
             final BigDecimal value;
             try {
                 value = (BigDecimal) confClass.getField(selectedSetting
-                    .getSelectedKey(state)).get(config);
+                        .getSelectedKey(state)).get(config);
-            } catch (NoSuchFieldException | SecurityException | IllegalAccessException | ClassCastException ex) {
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
                 LOGGER.warn("Failed to read setting {} from configuration {}",
                             selectedSetting.getSelectedKey(state),
                             selectedConf.getSelectedKey(state));
@@ -176,7 +179,7 @@ public class SettingFormBigDecimal extends Form {
 
         final TextField valueField = new TextField(VALUE_FIELD);
         valueField.setLabel(new GlobalizedMessage(
-            "ui.admin.configuration.setting.edit.new_value", ADMIN_BUNDLE));
+                "ui.admin.configuration.setting.edit.new_value", ADMIN_BUNDLE));
         add(valueField);
 
         final SaveCancelSection saveCancelSection = new SaveCancelSection();
@@ -189,21 +192,22 @@ public class SettingFormBigDecimal extends Form {
             final Class<?> confClass;
             try {
                 confClass = Class
-                    .forName(selectedConf.getSelectedKey(state));
+                        .forName(selectedConf.getSelectedKey(state));
             } catch (ClassNotFoundException ex) {
                 throw new UncheckedWrapperException(ex);
             }
 
             final ConfigurationManager confManager = cdiUtil.findBean(
-                ConfigurationManager.class);
+                    ConfigurationManager.class);
 
             final Object config = confManager.findConfiguration(confClass);
 
             final BigDecimal value;
             try {
                 value = (BigDecimal) confClass.getField(selectedSetting
-                    .getSelectedKey(state)).get(config);
+                        .getSelectedKey(state)).get(config);
-            } catch (NoSuchFieldException | SecurityException | IllegalAccessException | ClassCastException ex) {
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
                 LOGGER.warn("Failed to read setting {} from configuration {}",
                             selectedSetting.getSelectedKey(state),
                             selectedConf.getSelectedKey(state));
@@ -211,11 +215,10 @@ public class SettingFormBigDecimal extends Form {
                 return;
             }
 
-            valueField.setValue(state, value);
+            valueField.setValue(state, value.toString());
         });
 
         addValidationListener(e -> {
-            final PageState state = e.getPageState();
             final FormData data = e.getFormData();
 
             final String valueData = data.getString(VALUE_FIELD);
@@ -223,8 +226,8 @@ public class SettingFormBigDecimal extends Form {
             if (Strings.isBlank(valueData)) {
                 data.addError(VALUE_FIELD,
                               new GlobalizedMessage(
-                                  "ui.admin.configuration.setting.error.blank",
+                                      "ui.admin.configuration.setting.error.blank",
-                                  ADMIN_BUNDLE));
+                                      ADMIN_BUNDLE));
             }
 
             try {
@@ -233,16 +236,64 @@ public class SettingFormBigDecimal extends Form {
             } catch (NumberFormatException ex) {
                 data.addError(VALUE_FIELD,
                               new GlobalizedMessage(
-                                  "ui.admin.configuration.setting.error.not_a_bigdecimal",
+                                      "ui.admin.configuration.setting.error.not_a_bigdecimal",
-                                  ADMIN_BUNDLE));
+                                      ADMIN_BUNDLE));
             }
         });
 
         addProcessListener(e -> {
-            throw new UnsupportedOperationException();
+            final PageState state = e.getPageState();
+            final FormData data = e.getFormData();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+            final String settingName = selectedSetting.getSelectedKey(state);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Field field;
+            try {
+                field = confClass.getField(settingName);
+            } catch (NoSuchFieldException | SecurityException ex) {
+                throw new FormProcessException(
+                        String.format(
+                                "Failed to retrieve field \"%s\" "
+                                        + "from configuration class \"%s\".",
+                                settingName,
+                                confClass.getName()),
+                        new GlobalizedMessage(
+                                "ui.admin.configuration.setting.failed_to_set_value",
+                                ADMIN_BUNDLE),
+                        ex);
+            }
+            
+            final String valueData = data.getString(VALUE_FIELD);
+            final BigDecimal value = new BigDecimal(valueData);
+            
+            try {
+                field.set(config, value);
+            } catch (IllegalArgumentException | IllegalAccessException ex) {
+                 throw new FormProcessException(
+                        String.format(
+                                "Failed to change value of field \"%s\" "
+                                        + "of configuration class \"%s\".",
+                                settingName,
+                                confClass.getName()),
+                        new GlobalizedMessage(
+                                "ui.admin.configuration.setting.failed_to_set_value",
+                                ADMIN_BUNDLE),
+                        ex);
+            }
         });
     }
 
-   
-
 }

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/SettingFormBoolean.java

@@ -20,12 +20,20 @@ package com.arsdigita.ui.admin.configuration;
 
 import com.arsdigita.bebop.BoxPanel;
 import com.arsdigita.bebop.Form;
+import com.arsdigita.bebop.FormData;
+import com.arsdigita.bebop.FormProcessException;
+import com.arsdigita.bebop.GridPanel;
 import com.arsdigita.bebop.Label;
 import com.arsdigita.bebop.PageState;
 import com.arsdigita.bebop.ParameterSingleSelectionModel;
+import com.arsdigita.bebop.SaveCancelSection;
 import com.arsdigita.bebop.Text;
+import com.arsdigita.bebop.form.CheckboxGroup;
+import com.arsdigita.bebop.form.Option;
 import com.arsdigita.globalization.GlobalizedMessage;
 import com.arsdigita.util.UncheckedWrapperException;
+import java.lang.reflect.Field;
+import java.util.Objects;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -44,13 +52,16 @@ import static com.arsdigita.ui.admin.AdminUiConstants.*;
  */
 public class SettingFormBoolean extends Form {
 
+    private static final String VALUE_FIELD_GROUP = "valueFieldGroup";
+    private static final String VALUE_FIELD = "valueField";
+
     private static final Logger LOGGER = LogManager.getLogger(
-        SettingFormBoolean.class);
+            SettingFormBoolean.class);
 
     public SettingFormBoolean(
-        final ConfigurationTab configurationTab,
+            final ConfigurationTab configurationTab,
-        final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedConf,
-        final ParameterSingleSelectionModel<String> selectedSetting) {
+            final ParameterSingleSelectionModel<String> selectedSetting) {
 
         super("settingFormBoolean", new BoxPanel(BoxPanel.VERTICAL));
 
@@ -60,34 +71,34 @@ public class SettingFormBoolean extends Form {
 
             final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
             final ConfigurationManager confManager = cdiUtil.findBean(
-                ConfigurationManager.class);
+                    ConfigurationManager.class);
             final SettingManager settingManager = cdiUtil.findBean(
-                SettingManager.class);
+                    SettingManager.class);
             final GlobalizationHelper globalizationHelper = cdiUtil
-                .findBean(GlobalizationHelper.class);
+                    .findBean(GlobalizationHelper.class);
 
             final Class<?> confClass;
             try {
                 confClass = Class
-                    .forName(selectedConf.getSelectedKey(state));
+                        .forName(selectedConf.getSelectedKey(state));
             } catch (ClassNotFoundException ex) {
                 throw new UncheckedWrapperException(ex);
             }
 
             final ConfigurationInfo confInfo = confManager
-                .getConfigurationInfo(confClass);
+                    .getConfigurationInfo(confClass);
             final SettingInfo settingInfo = settingManager.getSettingInfo(
-                confClass, selectedSetting.getSelectedKey(state));
+                    confClass, selectedSetting.getSelectedKey(state));
 
             final String confTitle = confInfo.getTitle(globalizationHelper
-                .getNegotiatedLocale());
+                    .getNegotiatedLocale());
             final String settingLabel = settingInfo.getLabel(
-                globalizationHelper.getNegotiatedLocale());
+                    globalizationHelper.getNegotiatedLocale());
 
             target.setLabel(new GlobalizedMessage(
-                "ui.admin.configuration.setting.edit.heading",
+                    "ui.admin.configuration.setting.edit.heading",
-                ADMIN_BUNDLE,
+                    ADMIN_BUNDLE,
-                new String[]{confTitle, settingLabel}));
+                    new String[]{confTitle, settingLabel}));
         });
 
         heading.setClassAttr("heading");
@@ -100,27 +111,176 @@ public class SettingFormBoolean extends Form {
 
             final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
             final SettingManager settingManager = cdiUtil.findBean(
-                SettingManager.class);
+                    SettingManager.class);
             final GlobalizationHelper globalizationHelper = cdiUtil
-                .findBean(GlobalizationHelper.class);
+                    .findBean(GlobalizationHelper.class);
 
             final Class<?> confClass;
             try {
                 confClass = Class
-                    .forName(selectedConf.getSelectedKey(state));
+                        .forName(selectedConf.getSelectedKey(state));
             } catch (ClassNotFoundException ex) {
                 throw new UncheckedWrapperException(ex);
             }
 
             final SettingInfo settingInfo = settingManager.getSettingInfo(
-                confClass, selectedSetting.getSelectedKey(state));
+                    confClass, selectedSetting.getSelectedKey(state));
 
             target.setText(settingInfo.getDescription(globalizationHelper
-                .getNegotiatedLocale()));
+                    .getNegotiatedLocale()));
         });
 
         add(desc);
 
+        final GridPanel gridPanel = new GridPanel(2);
+
+        gridPanel.add(new Label(new GlobalizedMessage(
+                "ui.admin.configuration.setting.edit.current_value",
+                ADMIN_BUNDLE)));
+
+        gridPanel.add(new Text(e -> {
+            final PageState state = e.getPageState();
+            final Text target = (Text) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Boolean value;
+            try {
+                value = (Boolean) confClass.getField(selectedSetting
+                        .getSelectedKey(state)).get(config);
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
+                LOGGER.warn("Failed to read setting {} from configuration {}",
+                            selectedSetting.getSelectedKey(state),
+                            selectedConf.getSelectedKey(state));
+                LOGGER.warn(ex);
+                target.setText("Failed to read setting value.");
+                return;
+            }
+
+            target.setText(Objects.toString(value));
+        }));
+
+        add(gridPanel);
+
+        final CheckboxGroup valueFieldGroup = new CheckboxGroup(
+                VALUE_FIELD_GROUP);
+        valueFieldGroup.addOption(
+                new Option(VALUE_FIELD,
+                           new Label(new GlobalizedMessage(
+                                   "ui.admin.configuration.setting.edit.new_value",
+                                   ADMIN_BUNDLE))));
+
+        final SaveCancelSection saveCancelSection = new SaveCancelSection();
+        add(saveCancelSection);
+
+        addInitListener(e -> {
+            final PageState state = e.getPageState();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Boolean value;
+            try {
+                value = (Boolean) confClass.getField(selectedSetting
+                        .getSelectedKey(state)).get(config);
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
+                LOGGER.warn("Failed to read setting {} from configuration {}",
+                            selectedSetting.getSelectedKey(state),
+                            selectedConf.getSelectedKey(state));
+                LOGGER.warn(ex);
+                return;
+            }
+
+            if (value) {
+                valueFieldGroup.setValue(state, VALUE_FIELD);
+            }
+        });
+
+        addProcessListener(e -> {
+            final PageState state = e.getPageState();
+            final FormData data = e.getFormData();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+            final String settingName = selectedSetting.getSelectedKey(state);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Field field;
+            try {
+                field = confClass.getField(settingName);
+            } catch (NoSuchFieldException | SecurityException ex) {
+                throw new FormProcessException(
+                        String.format(
+                                "Failed to retrieve field \"%s\" "
+                                        + "from configuration class \"%s\".",
+                                settingName,
+                                confClass.getName()),
+                        new GlobalizedMessage(
+                                "ui.admin.configuration.setting.failed_to_set_value",
+                                ADMIN_BUNDLE),
+                        ex);
+            }
+
+            try {
+                final String[] valueData = (String[]) data.
+                        get(VALUE_FIELD_GROUP);
+                if (valueData != null && valueData.length > 0) {
+                    if (VALUE_FIELD.equals(valueData[0])) {
+                        field.set(config, Boolean.TRUE);
+                    } else {
+                        field.set(config, Boolean.FALSE);
+                    }
+                }
+            } catch (IllegalArgumentException | IllegalAccessException ex) {
+                throw new FormProcessException(
+                        String.format(
+                                "Failed to change value of field \"%s\" "
+                                        + "of configuration class \"%s\".",
+                                settingName,
+                                confClass.getName()),
+                        new GlobalizedMessage(
+                                "ui.admin.configuration.setting.failed_to_set_value",
+                                ADMIN_BUNDLE),
+                        ex);
+            }
+
+        });
 
     }
 

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/SettingFormCurrentValuePanel.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2016 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 com.arsdigita.ui.admin.configuration;
+
+import com.arsdigita.bebop.GridPanel;
+import com.arsdigita.bebop.Label;
+import com.arsdigita.bebop.PageState;
+import com.arsdigita.bebop.ParameterSingleSelectionModel;
+import com.arsdigita.bebop.Text;
+import com.arsdigita.globalization.GlobalizedMessage;
+import com.arsdigita.util.UncheckedWrapperException;
+import java.util.Objects;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.libreccm.cdi.utils.CdiUtil;
+import org.libreccm.configuration.ConfigurationManager;
+
+import static com.arsdigita.ui.admin.AdminUiConstants.*;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class SettingFormCurrentValuePanel extends GridPanel {
+
+    private final static Logger LOGGER = LogManager.getLogger(
+            SettingFormCurrentValuePanel.class);
+
+    public SettingFormCurrentValuePanel(
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting) {
+        super(2);
+
+        add(new Label(new GlobalizedMessage(
+                "ui.admin.configuration.setting.edit.current_value",
+                ADMIN_BUNDLE)));
+
+        add(new Text(e -> {
+            final PageState state = e.getPageState();
+            final Text target = (Text) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Object value;
+            try {
+                value = confClass.getField(selectedSetting
+                        .getSelectedKey(state)).get(config);
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException ex) {
+                LOGGER.warn("Failed to read setting {} from configuration {}",
+                            selectedSetting.getSelectedKey(state),
+                            selectedConf.getSelectedKey(state));
+                LOGGER.warn(ex);
+                target.setText("Failed to read setting value.");
+                return;
+            }
+
+            target.setText(Objects.toString(value));
+        }));
+    }
+
+}

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/SettingFormHeader.java

@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2016 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 com.arsdigita.ui.admin.configuration;
+
+import com.arsdigita.bebop.BoxPanel;
+import com.arsdigita.bebop.Label;
+import com.arsdigita.bebop.PageState;
+import com.arsdigita.bebop.ParameterSingleSelectionModel;
+import com.arsdigita.bebop.Text;
+import com.arsdigita.bebop.event.PrintEvent;
+import com.arsdigita.bebop.event.PrintListener;
+import com.arsdigita.globalization.GlobalizedMessage;
+import com.arsdigita.util.UncheckedWrapperException;
+
+import org.libreccm.cdi.utils.CdiUtil;
+import org.libreccm.configuration.ConfigurationInfo;
+import org.libreccm.configuration.ConfigurationManager;
+import org.libreccm.configuration.SettingInfo;
+import org.libreccm.configuration.SettingManager;
+import org.libreccm.l10n.GlobalizationHelper;
+
+import static com.arsdigita.ui.admin.AdminUiConstants.*;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class SettingFormHeader extends BoxPanel {
+
+    public SettingFormHeader(
+        final ParameterSingleSelectionModel<String> selectedConf,
+        final ParameterSingleSelectionModel<String> selectedSetting) {
+
+        super(BoxPanel.VERTICAL);
+
+        final Label heading = new Label(new HeadingPrintListener(
+            selectedConf, selectedSetting));
+        heading.setClassAttr("heading");
+
+        add(heading);
+
+        final Text desc = new Text(new DescPrintListener(selectedConf,
+                                                         selectedSetting));
+
+        add(desc);
+    }
+
+    private class HeadingPrintListener implements PrintListener {
+
+        private final ParameterSingleSelectionModel<String> selectedConf;
+        private final ParameterSingleSelectionModel<String> selectedSetting;
+
+        public HeadingPrintListener(
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting) {
+
+            this.selectedConf = selectedConf;
+            this.selectedSetting = selectedSetting;
+
+        }
+
+        @Override
+        public void prepare(final PrintEvent event) {
+
+            final PageState state = event.getPageState();
+            final Label target = (Label) event.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                ConfigurationManager.class);
+            final SettingManager settingManager = cdiUtil.findBean(
+                SettingManager.class);
+            final GlobalizationHelper globalizationHelper = cdiUtil
+                .findBean(GlobalizationHelper.class);
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                    .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationInfo confInfo = confManager
+                .getConfigurationInfo(confClass);
+            final SettingInfo settingInfo = settingManager.getSettingInfo(
+                confClass, selectedSetting.getSelectedKey(state));
+
+            final String confTitle = confInfo.getTitle(globalizationHelper
+                .getNegotiatedLocale());
+            final String settingLabel = settingInfo.getLabel(
+                globalizationHelper.getNegotiatedLocale());
+
+            target.setLabel(new GlobalizedMessage(
+                "ui.admin.configuration.setting.edit.heading",
+                ADMIN_BUNDLE,
+                new String[]{confTitle, settingLabel}));
+        }
+
+    }
+
+    private class DescPrintListener implements PrintListener {
+
+        private final ParameterSingleSelectionModel<String> selectedConf;
+        private final ParameterSingleSelectionModel<String> selectedSetting;
+
+        public DescPrintListener(
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting) {
+
+            this.selectedConf = selectedConf;
+            this.selectedSetting = selectedSetting;
+
+        }
+
+        @Override
+        public void prepare(final PrintEvent event) {
+            final PageState state = event.getPageState();
+            final Text target = (Text) event.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+            final SettingManager settingManager = cdiUtil.findBean(
+                SettingManager.class);
+            final GlobalizationHelper globalizationHelper = cdiUtil
+                .findBean(GlobalizationHelper.class);
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                    .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final SettingInfo settingInfo = settingManager.getSettingInfo(
+                confClass, selectedSetting.getSelectedKey(state));
+
+            target.setText(settingInfo.getDescription(globalizationHelper
+                .getNegotiatedLocale()));
+        }
+
+    }
+
+}

ccm-core/src/main/java/com/arsdigita/ui/admin/configuration/SettingFormLong.java

@@ -0,0 +1,296 @@
+/*
+ * Copyright (C) 2016 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 com.arsdigita.ui.admin.configuration;
+
+import com.arsdigita.bebop.BoxPanel;
+import com.arsdigita.bebop.Form;
+import com.arsdigita.bebop.FormData;
+import com.arsdigita.bebop.FormProcessException;
+import com.arsdigita.bebop.GridPanel;
+import com.arsdigita.bebop.Label;
+import com.arsdigita.bebop.PageState;
+import com.arsdigita.bebop.ParameterSingleSelectionModel;
+import com.arsdigita.bebop.SaveCancelSection;
+import com.arsdigita.bebop.Text;
+import com.arsdigita.bebop.form.TextField;
+import com.arsdigita.globalization.GlobalizedMessage;
+import com.arsdigita.util.UncheckedWrapperException;
+import java.lang.reflect.Field;
+import java.util.Objects;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.util.Strings;
+import org.libreccm.cdi.utils.CdiUtil;
+import org.libreccm.configuration.ConfigurationInfo;
+import org.libreccm.configuration.ConfigurationManager;
+import org.libreccm.configuration.SettingInfo;
+import org.libreccm.configuration.SettingManager;
+import org.libreccm.l10n.GlobalizationHelper;
+
+import static com.arsdigita.ui.admin.AdminUiConstants.*;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class SettingFormLong extends Form {
+
+    private static final Logger LOGGER = LogManager.getLogger(
+            SettingFormLong.class);
+
+    private static final String VALUE_FIELD = "valueField";
+
+    public SettingFormLong(
+            final ConfigurationTab configurationTab,
+            final ParameterSingleSelectionModel<String> selectedConf,
+            final ParameterSingleSelectionModel<String> selectedSetting) {
+
+        super("settingBoolean", new BoxPanel(BoxPanel.VERTICAL));
+
+        final Label heading = new Label(e -> {
+            final PageState state = e.getPageState();
+            final Label target = (Label) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+            final SettingManager settingManager = cdiUtil.findBean(
+                    SettingManager.class);
+            final GlobalizationHelper globalizationHelper = cdiUtil
+                    .findBean(GlobalizationHelper.class);
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationInfo confInfo = confManager
+                    .getConfigurationInfo(confClass);
+            final SettingInfo settingInfo = settingManager.getSettingInfo(
+                    confClass, selectedSetting.getSelectedKey(state));
+
+            final String confTitle = confInfo.getTitle(globalizationHelper
+                    .getNegotiatedLocale());
+            final String settingLabel = settingInfo.getLabel(
+                    globalizationHelper.getNegotiatedLocale());
+
+            target.setLabel(new GlobalizedMessage(
+                    "ui.admin.configuration.setting.edit.heading",
+                    ADMIN_BUNDLE,
+                    new String[]{confTitle, settingLabel}));
+        });
+
+        heading.setClassAttr("heading");
+
+        add(heading);
+
+        final Text desc = new Text(e -> {
+            final PageState state = e.getPageState();
+            final Text target = (Text) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+            final SettingManager settingManager = cdiUtil.findBean(
+                    SettingManager.class);
+            final GlobalizationHelper globalizationHelper = cdiUtil
+                    .findBean(GlobalizationHelper.class);
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final SettingInfo settingInfo = settingManager.getSettingInfo(
+                    confClass, selectedSetting.getSelectedKey(state));
+
+            target.setText(settingInfo.getDescription(globalizationHelper
+                    .getNegotiatedLocale()));
+        });
+
+        add(desc);
+
+        final GridPanel gridPanel = new GridPanel(2);
+
+        gridPanel.add(new Label(new GlobalizedMessage(
+                "ui.admin.configuration.setting.edit.current_value",
+                ADMIN_BUNDLE)));
+
+        gridPanel.add(new Text(e -> {
+            final PageState state = e.getPageState();
+            final Text target = (Text) e.getTarget();
+
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Long value;
+            try {
+                value = (Long) confClass.getField(selectedSetting
+                        .getSelectedKey(state)).get(config);
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
+                LOGGER.warn("Failed to read setting {} from configuration {}",
+                            selectedSetting.getSelectedKey(state),
+                            selectedConf.getSelectedKey(state));
+                LOGGER.warn(ex);
+                target.setText("Failed to read setting value.");
+                return;
+            }
+
+            target.setText(Objects.toString(value));
+        }));
+
+        add(gridPanel);
+
+        final TextField valueField = new TextField(VALUE_FIELD);
+        valueField.setLabel(new GlobalizedMessage(
+                "ui.admin.configuration.setting.edit.new_value", ADMIN_BUNDLE));
+        add(valueField);
+
+        final SaveCancelSection saveCancelSection = new SaveCancelSection();
+        add(saveCancelSection);
+
+        addInitListener(e -> {
+            final PageState state = e.getPageState();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Long value;
+            try {
+                value = (Long) confClass.getField(selectedSetting
+                        .getSelectedKey(state)).get(config);
+            } catch (NoSuchFieldException | SecurityException |
+                     IllegalAccessException | ClassCastException ex) {
+                LOGGER.warn("Failed to read setting {} from configuration {}",
+                            selectedSetting.getSelectedKey(state),
+                            selectedConf.getSelectedKey(state));
+                LOGGER.warn(ex);
+                return;
+            }
+
+            valueField.setValue(state, value.toString());
+        });
+
+        addValidationListener(e -> {
+            final FormData data = e.getFormData();
+
+            final String valueData = data.getString(VALUE_FIELD);
+
+            if (Strings.isBlank(valueData)) {
+                data.addError(VALUE_FIELD,
+                              new GlobalizedMessage(
+                                      "ui.admin.configuration.setting.error.blank",
+                                      ADMIN_BUNDLE));
+            }
+
+            try {
+                final Long value = new Long(valueData);
+                LOGGER.debug("New value {} is a valid Long.", value);
+            } catch (NumberFormatException ex) {
+                data.addError(VALUE_FIELD,
+                              new GlobalizedMessage(
+                                      "ui.admin.configuration.setting.error.not_a_long",
+                                      ADMIN_BUNDLE));
+            }
+        });
+
+        addProcessListener(e -> {
+            final PageState state = e.getPageState();
+            final FormData data = e.getFormData();
+            final CdiUtil cdiUtil = CdiUtil.createCdiUtil();
+
+            final Class<?> confClass;
+            try {
+                confClass = Class
+                        .forName(selectedConf.getSelectedKey(state));
+            } catch (ClassNotFoundException ex) {
+                throw new UncheckedWrapperException(ex);
+            }
+
+            final ConfigurationManager confManager = cdiUtil.findBean(
+                    ConfigurationManager.class);
+            final String settingName = selectedSetting.getSelectedKey(state);
+
+            final Object config = confManager.findConfiguration(confClass);
+
+            final Field field;
+            try {
+                field = confClass.getField(settingName);
+            } catch (NoSuchFieldException | SecurityException ex) {
+                throw new FormProcessException(
+                        String.format(
+                                "Failed to retrieve field \"%s\" "
+                                        + "from configuration class \"%s\".",
+                                settingName,
+                                confClass.getName()),
+                        new GlobalizedMessage(
+                                "ui.admin.configuration.setting.failed_to_set_value",
+                                ADMIN_BUNDLE),
+                        ex);
+            }
+
+            final String valueData = data.getString(VALUE_FIELD);
+            final Long value = new Long(valueData);
+
+            try {
+                field.set(config, value);
+            } catch (IllegalArgumentException | IllegalAccessException ex) {
+                throw new FormProcessException(
+                        String.format(
+                                "Failed to change value of field \"%s\" "
+                                        + "of configuration class \"%s\".",
+                                settingName,
+                                confClass.getName()),
+                        new GlobalizedMessage(
+                                "ui.admin.configuration.setting.failed_to_set_value",
+                                ADMIN_BUNDLE),
+                        ex);
+            }
+        });
+    }
+
+}