CCM NG: Next part of the sites/pages/themes complex

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@5038 8810af33-2d31-482b-a856-94f89814c4df

Former-commit-id: 18bc170d68

ccm-cms/src/main/java/org/librecms/pages/Pages.java

@@ -16,15 +16,15 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.librecms.sites;
+package org.librecms.pages;
 
 import org.libreccm.categorization.Domain;
+import org.libreccm.sites.Site;
 import org.libreccm.web.CcmApplication;
 
 import java.io.Serializable;
 import java.util.Objects;
 
-import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.JoinColumn;
 import javax.persistence.NamedQueries;
@@ -39,48 +39,50 @@ import static org.librecms.CmsConstants.*;
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @Entity
-@Table(name = "SITES", schema = DB_SCHEMA)
+@Table(name = "PAGES", schema = DB_SCHEMA)
 @NamedQueries({
     @NamedQuery(
-        name = "Site.findByName",
+        name = "Pages.findForSite",
-        query = "SELECT s FROM Site s WHERE s.name = :name"
+        query = "SELECT p FROM Pages p JOIN p.site s "
+                    + "WHERE s.domainOfSite = :domain")
+    ,
+    @NamedQuery(
+        name = "Pages.findForDefaultSite",
+        query = "SELECT p FROM Pages p JOIN p.site s "
+                    + "WHERE s.defaultSite = true"
     )
+    ,
+    @NamedQuery(
+        name = "Pages.availableForSite",
+        query = "SELECT (CASE WHEN COUNT(s) > 0 THEN true ELSE false END) "
+                    + "FROM Pages p JOIN p.site s "
+                    + "WHERE s.domainOfSite = :domain")
+    ,
+    @NamedQuery(
+        name = "Pages.availableForDefaultSite",
+        query = "SELECT (CASE WHEN COUNT(p) > 0 THEN true ELSE false END) "
+                    + "FROM Pages p JOIN p.site s "
+                    + "WHERE s.defaultSite = true"),
+
 })
-public class Site extends CcmApplication implements Serializable {
+public class Pages extends CcmApplication implements Serializable {
 
     private static final long serialVersionUID = -352205318143692477L;
 
-    /**
+    @OneToOne
-     * The domain of the site.
+    @JoinColumn(name = "SITE_ID")
-     */
+    private Site site;
-    @Column(name = "NAME", unique = true)
-    private String name;
-
-    /**
-     * Should this be the default site which is used when there is no matching
-     * site?
-     */
-    @Column(name = "DEFAULT_SITE")
-    private boolean defaultSite;
 
     @OneToOne
     @JoinColumn(name = "CATEGORY_DOMAIN_ID")
     private Domain categoryDomain;
 
-    public String getName() {
+    public Site getSite() {
-        return name;
+        return site;
     }
 
-    public void setName(final String name) {
+    protected void setSite(final Site site) {
-        this.name = name;
+        this.site = site;
-    }
-
-    public boolean isDefaultSite() {
-        return defaultSite;
-    }
-
-    public void setDefaultSite(boolean defaultSite) {
-        this.defaultSite = defaultSite;
     }
 
     public Domain getCategoryDomain() {
@@ -94,9 +96,8 @@ public class Site extends CcmApplication implements Serializable {
     @Override
     public int hashCode() {
         int hash = 7;
-        hash = 17 * hash + Objects.hashCode(name);
-        hash = 17 * hash + (defaultSite ? 1 : 0);
         hash = 17 * hash + Objects.hashCode(categoryDomain);
+        hash = 17 * hash + Objects.hashCode(site);
         return hash;
     }
 
@@ -115,19 +116,16 @@ public class Site extends CcmApplication implements Serializable {
             return false;
         }
 
-        if (!(obj instanceof Site)) {
+        if (!(obj instanceof Pages)) {
             return false;
         }
 
-        final Site other = (Site) obj;
+        final Pages other = (Pages) obj;
         if (!other.canEqual(this)) {
             return false;
         }
 
-        if (!Objects.equals(name, other.getName())) {
+        if (!Objects.equals(site, other.getSite())) {
-            return false;
-        }
-        if (defaultSite != other.isDefaultSite()) {
             return false;
         }
 
@@ -136,17 +134,15 @@ public class Site extends CcmApplication implements Serializable {
 
     @Override
     public boolean canEqual(final Object obj) {
-        return obj instanceof Site;
+        return obj instanceof Pages;
     }
 
     @Override
     public String toString(final String data) {
 
         return super.toString(String.format(
-            ", name = \"%s\","
+            ", site = \"%s\"%s",
-                + "defaultSite = %b%s",
+            Objects.toString(site),
-            name,
-            defaultSite,
             data
         ));
     }

ccm-cms/src/main/java/org/librecms/pages/PagesApplication.java

@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.librecms.sites;
+package org.librecms.pages;
 
 import java.util.HashSet;
 import java.util.Set;
@@ -30,14 +30,14 @@ import javax.ws.rs.core.Application;
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @ApplicationPath("/pages")
-public class Sites extends Application {
+public class PagesApplication extends Application {
 
     @Override
     public Set<Class<?>> getClasses() {
 
         final Set<Class<?>> classes = new HashSet<>();
 
-        classes.add(Pages.class);
+        classes.add(PagesRouter.class);
 
         return classes;
     }

ccm-cms/src/main/java/org/librecms/pages/PagesConstants.java

@@ -16,29 +16,21 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.librecms.sites;
+package org.librecms.pages;
-
-import org.libreccm.core.CcmObjectRepository;
-
-import javax.enterprise.context.RequestScoped;
-import javax.persistence.TypedQuery;
-import javax.transaction.Transactional;
 
 /**
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-@RequestScoped
+public final class PagesConstants {
-public class SiteRepository extends CcmObjectRepository {
 
-    @Transactional(Transactional.TxType.REQUIRED)
+    private PagesConstants() {
-    public Site findByName(final String name) {
+        //Nothing
-
-        final TypedQuery<Site> query = getEntityManager()
-            .createNamedQuery("Site.findByName", Site.class);
-        query.setParameter("name", name);
-
-        return query.getSingleResult();
     }
 
+    public static final String CATEGORIZATION_TYPE_PAGE_MODEL_INDEX
+                               = "page_model_index";
+    public static final String CATEGORIZATION_TYPE_PAGE_MODEL_ITEM
+                               = "page_model_item";
+
 }

ccm-cms/src/main/java/org/librecms/pages/PagesRepository.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2017 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.librecms.pages;
+
+import com.arsdigita.ui.admin.AdminUiConstants;
+
+import org.libreccm.core.AbstractEntityRepository;
+import org.libreccm.core.CcmObjectRepository;
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.sites.SiteRepository;
+import org.librecms.CmsConstants;
+import org.librecms.contentsection.privileges.AdminPrivileges;
+
+import java.util.Optional;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.persistence.NoResultException;
+import javax.persistence.TypedQuery;
+import javax.transaction.Transactional;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+public class PagesRepository extends AbstractEntityRepository<Long, Pages> {
+
+    @Inject
+    private SiteRepository siteRepo;
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Pages> findPagesForSite(final String domainOfSite) {
+
+        if (siteRepo.hasSiteForDomain(domainOfSite)) {
+            final TypedQuery<Pages> query = getEntityManager()
+            .createNamedQuery("Pages.findForSite", Pages.class);
+            query.setParameter("domain", domainOfSite);
+            
+            try {
+                return Optional.of(query.getSingleResult());
+            } catch(NoResultException ex) {
+                return Optional.empty();
+            }
+        } else {
+            final TypedQuery<Pages> query = getEntityManager()
+                .createNamedQuery("Pages.findForDefaultSite", Pages.class);
+            try {
+                return Optional.of(query.getSingleResult());
+            } catch (NoResultException ex) {
+                return Optional.empty();
+            }
+        }
+    }
+
+    @Override
+    public Class<Pages> getEntityClass() {
+        return Pages.class;
+    }
+
+    @Override
+    public boolean isNew(final Pages pages) {
+        return pages.getObjectId() == 0;
+    }
+
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Override
+    public void save(final Pages pages) {
+        super.save(pages);
+    }
+    
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Override
+    public void delete(final Pages pages) {
+        super.delete(pages);
+    }
+    
+}

ccm-cms/src/main/java/org/librecms/pages/PagesRouter.java

@@ -16,22 +16,22 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.librecms.sites;
+package org.librecms.pages;
 
 import org.libreccm.categorization.Category;
 import org.libreccm.categorization.CategoryManager;
 import org.libreccm.categorization.CategoryRepository;
 import org.libreccm.pagemodel.PageModelManager;
 
-import java.util.Optional;
-
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
 import javax.transaction.Transactional;
+import javax.ws.rs.DefaultValue;
 import javax.ws.rs.NotFoundException;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.UriInfo;
 
@@ -41,7 +41,7 @@ import javax.ws.rs.core.UriInfo;
  */
 @RequestScoped
 @Path("/{page:.+}")
-public class Pages {
+public class PagesRouter {
 
     @Inject
     private CategoryManager categoryManager;
@@ -49,36 +49,56 @@ public class Pages {
     @Inject
     private CategoryRepository categoryRepo;
     
+
+
     @Inject
     private PageModelManager pageModelManager;
 
     @Inject
-    private SiteRepository siteRepo;
+    private PagesRepository siteRepo;
 
-    @Path("/")
+    @Path("/index.{lang}.html")
     @Produces("text/html")
     @Transactional(Transactional.TxType.REQUIRED)
-    public String getPage(@Context final UriInfo uriInfo,
+    public String getCategoryIndexPage(
-                          @PathParam("page") final String page) {
+        @Context final UriInfo uriInfo,
+        @PathParam("page") final String page,
+        @PathParam("lang") final String language,
+        @QueryParam("theme") @DefaultValue("--DEFAULT--") final String theme) {
 
-        final String siteName = uriInfo.getBaseUri().getHost();
+        final String domain = uriInfo.getBaseUri().getHost();
 
-        final Site site = siteRepo.findByName(siteName);
+        final Pages pages = siteRepo
-        final Category category  =categoryRepo
+            .findPagesForSite(domain)
-            .findByPath(site.getCategoryDomain(), page)
+            .orElseThrow(() -> new NotFoundException(String
-        .orElseThrow(() -> new NotFoundException(String.format(
+            .format("No Pages for domain \"%s\" available.",
+                    domain)));
+
+        final Category category = categoryRepo
+            .findByPath(pages.getCategoryDomain(), page)
+            .orElseThrow(() -> new NotFoundException(String.format(
             "No page for path \"%s\" in site \"%s\"",
             page,
-            siteName)));
+            domain)));
+
+
         
         // ToDo Get PageModelBuilder
         // ToDo Build page
         // ToDo Get Theme Processor 
         // ToDo Pass page to theme processor
         // ToDo Return result of ThemeProcessor
+        throw new UnsupportedOperationException();
+    }
+
+    @Path("/{name}.{lang}.html")
+    public String getPage(
+        @Context final UriInfo uriInfo,
+        @PathParam("page") final String page,
+        @PathParam("lang") final String language,
+        @QueryParam("theme") @DefaultValue("--DEFAULT--") final String theme) {
         
         throw new UnsupportedOperationException();
-
     }
 
 }

ccm-core/src/main/java/org/libreccm/pagemodel/AbstractPageBuilder.java

@@ -29,9 +29,6 @@ import java.util.Optional;
  * interface providing some functionality needed by all implementations of the
  * {@link PageBuilder} interface.
  *
- * @param <P> Generics variable for the class which represents the page created
- *            by the {@link PageBuilder}.
- *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  *
  */
@@ -47,18 +44,23 @@ public abstract class AbstractPageBuilder implements PageBuilder {
      * the component objects created by the {@link ComponentBuilder}s are added
      * to the page.
      *
-     * @param pageModel The {@link PageModel\ to process.
+     * @param pageModel  The {@link PageModel} to process.
+     * @param parameters Parameters provided by application which wants to
+     *                   render a {@link PageModel}. The parameters are passed
+     *                   the {@link ComponentBuilder}s.
      *
      * @return A page containing all components from the {@link PageModel}.
      */
     @Override
-    public Map<String, Object> buildPage(final PageModel pageModel) {
+    public Map<String, Object> buildPage(final PageModel pageModel,
+                                         final Map<String, Object> parameters) {
 
-        final Map<String, Object> page = buildPage();
+        final Map<String, Object> page = buildPage(parameters);
 
         for (final ComponentModel componentModel : pageModel.getComponents()) {
             final Optional<Object> component = buildComponent(
-                componentModel, componentModel.getClass());
+                componentModel, componentModel.getClass(),
+                parameters);
             if (component.isPresent()) {
                 page.put(componentModel.getIdAttribute(),
                          component);
@@ -75,12 +77,16 @@ public abstract class AbstractPageBuilder implements PageBuilder {
      *                            created.
      * @param componentModel      The {@link ComponentModel} to process.
      * @param componentModelClass The class of the {@link ComponentModel}.
+     * @param parameters          Parameters provided by application which wants
+     *                            to render a {@link PageModel}. The parameters
+     *                            are passed the {@link ComponentBuilder}s.
      *
      * @return The components described by the {@code componentModel}.
      */
     protected <M extends ComponentModel> Optional<Object> buildComponent(
         final ComponentModel componentModel,
-        final Class<M> componentModelClass) {
+        final Class<M> componentModelClass,
+        final Map<String, Object> parameters) {
 
         componentBuilderManager.findComponentBuilder(componentModel.getClass());
 
@@ -90,7 +96,7 @@ public abstract class AbstractPageBuilder implements PageBuilder {
         if (builder.isPresent()) {
             @SuppressWarnings("unchecked")
             final M model = (M) componentModel;
-            return Optional.of(builder.get().buildComponent(model));
+            return Optional.of(builder.get().buildComponent(model, parameters));
         } else {
             return Optional.empty();
         }

ccm-core/src/main/java/org/libreccm/pagemodel/ComponentBuilder.java

@@ -30,6 +30,7 @@ import java.util.Map;
  */
 public interface ComponentBuilder<M extends ComponentModel> {
 
-    Map<String, Object> buildComponent(M componentModel);
+    Map<String, Object> buildComponent(M componentModel,
+                                       final Map<String, Object> parameters);
 
 }

ccm-core/src/main/java/org/libreccm/pagemodel/PageBuilder.java

@@ -43,21 +43,27 @@ public interface PageBuilder {
      * {@link #buildPage(org.libreccm.pagemodel.PageModel)} should use this
      * method for creating the default page.
      *
+     * @param parameters Parameters provided by application which wants to
+     *                   render a {@link PageModel}. The parameters are passed
+     *                   the {@link ComponentBuilder}s.
+     *
      * @return A page with the default components.
      */
-    Map<String, Object> buildPage();
+    Map<String, Object> buildPage(Map<String, Object> parameters);
 
     /**
      * Build a page of type {@code P} using the provided {@link PageModel}.
      * Implementations should call the implementation of {@link #buildPage()}
      * for creating the basic page with the default components.
      *
-     * @param pageModel The {@link PageModel} from which the page is generated.
+     * @param pageModel  The {@link PageModel} from which the page is generated.
+     * @param parameters Parameters provided by application which wants to
+     *                   render a {@link PageModel}. The parameters are passed
+     *                   the {@link ComponentBuilder}s.
      *
      * @return The page generated from the provided {@link PageModel}.
      */
-    Map<String, Object> buildPage(PageModel pageModel);
+    Map<String, Object> buildPage(PageModel pageModel,
-    
+                                  Map<String, Object> parameters);
-    
 
 }

ccm-core/src/main/java/org/libreccm/pagemodel/PageModel.java

@@ -18,6 +18,7 @@
  */
 package org.libreccm.pagemodel;
 
+import org.libreccm.core.CcmObject;
 import org.libreccm.core.CoreConstants;
 import org.libreccm.l10n.LocalizedString;
 import org.libreccm.web.CcmApplication;
@@ -25,6 +26,7 @@ import org.libreccm.web.CcmApplication;
 import javax.validation.constraints.NotNull;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
@@ -35,9 +37,6 @@ import javax.persistence.Embedded;
 import javax.persistence.Entity;
 import javax.persistence.EnumType;
 import javax.persistence.Enumerated;
-import javax.persistence.GeneratedValue;
-import javax.persistence.GenerationType;
-import javax.persistence.Id;
 import javax.persistence.Inheritance;
 import javax.persistence.InheritanceType;
 import javax.persistence.JoinColumn;
@@ -110,27 +109,10 @@ import javax.persistence.Table;
                     + "AND p.version = org.libreccm.pagemodel.PageModelVersion.LIVE"
     )
 })
-public class PageModel implements Serializable {
+public class PageModel extends CcmObject implements Serializable {
 
     private static final long serialVersionUID = 7252512839926020978L;
 
-    /**
-     * The ID of the entity in the database.
-     */
-    @Id
-    @Column(name = "PAGE_MODEL_ID")
-    @GeneratedValue(strategy = GenerationType.AUTO)
-    private long pageModelId;
-
-    /**
-     * The UUID of this {@code PageModel}. Please note that this UUID identifies
-     * the dataset not the model. Therefore the draft and the live version have
-     * different values for this field.
-     */
-    @Column(name = "UUID", length = 255, nullable = false)
-    @NotNull
-    private String uuid;
-
     /**
      * The UUID of the model. Same for draft and live version.
      */
@@ -203,22 +185,6 @@ public class PageModel implements Serializable {
         description = new LocalizedString();
     }
 
-    public long getPageModelId() {
-        return pageModelId;
-    }
-
-    protected void setPageModelId(final long pageModelId) {
-        this.pageModelId = pageModelId;
-    }
-
-    public String getUuid() {
-        return uuid;
-    }
-
-    protected void setUuid(final String uuid) {
-        this.uuid = uuid;
-    }
-
     public String getModelUuid() {
         return modelUuid;
     }
@@ -282,7 +248,7 @@ public class PageModel implements Serializable {
     }
 
     protected void setComponents(final List<ComponentModel> components) {
-        this.components = components;
+        this.components = new ArrayList<>(components);
     }
 
     protected void addComponent(final ComponentModel component) {
@@ -299,9 +265,7 @@ public class PageModel implements Serializable {
 
     @Override
     public int hashCode() {
-        int hash = 7;
+        int hash = super.hashCode();
-        hash = 71 * hash + (int) (pageModelId ^ (pageModelId >>> 32));
-        hash = 71 * hash + Objects.hashCode(uuid);
         hash = 71 * hash + Objects.hashCode(name);
         hash = 71 * hash + Objects.hashCode(title);
         hash = 71 * hash + Objects.hashCode(description);
@@ -317,6 +281,11 @@ public class PageModel implements Serializable {
         if (obj == null) {
             return false;
         }
+
+        if (!super.equals(obj)) {
+            return false;
+        }
+
         if (!(obj instanceof PageModel)) {
             return false;
         }
@@ -324,12 +293,6 @@ public class PageModel implements Serializable {
         if (!other.canEqual(this)) {
             return false;
         }
-        if (pageModelId != other.getPageModelId()) {
-            return false;
-        }
-        if (!Objects.equals(uuid, other.getUuid())) {
-            return false;
-        }
         if (!Objects.equals(name, other.getName())) {
             return false;
         }
@@ -342,31 +305,21 @@ public class PageModel implements Serializable {
         return Objects.equals(description, other.getDescription());
     }
 
+    @Override
     public boolean canEqual(final Object obj) {
         return obj instanceof PageModel;
     }
 
     @Override
-    public final String toString() {
-        return toString("");
-    }
-
     public String toString(final String data) {
-        return String.format("%s{ "
+        return super.toString(String.format(", name = \"%s\", "
-                                 + "pageModelId = %d, "
+                                                + "title = %s, "
-                                 + "uuid = %s, "
+                                                + "description = %s%s",
-                                 + "name = \"%s\", "
+                                            super.toString(),
-                                 + "title = %s, "
+                                            name,
-                                 + "description = %s, "
+                                            Objects.toString(title),
-                                 + "type = \"%s\""
+                                            Objects.toString(description),
-                                 + " }",
+                                            data));
-                             super.toString(),
-                             pageModelId,
-                             uuid,
-                             name,
-                             Objects.toString(title),
-                             Objects.toString(description),
-                             type);
     }
 
 }

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

@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2017 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.sites;
+
+import static org.libreccm.core.CoreConstants.*;
+
+import org.libreccm.core.CcmObject;
+
+import java.util.Objects;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
+import javax.persistence.Table;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@Entity
+@Table(name = "SITES", schema = DB_SCHEMA)
+@NamedQueries({
+    @NamedQuery(
+        name = "Site.findByDomain",
+        query = "SELECT s FROM Site s WHERE s.domainOfSite = :domain"
+    )
+    ,
+    @NamedQuery(
+        name = "Site.hasSiteForDomain",
+        query = "SELECT (CASE WHEN COUNT(s) > 0 THEN true ELSE false END) "
+                    + "FROM Site s "
+                    + "WHERE s.domainOfSite = :domain")
+})
+public class Site extends CcmObject {
+
+    private static final long serialVersionUID = 7993361616050713139L;
+
+    @Column(name = "DOMAIN_OF_SITE", unique = true)
+    private String domainOfSite;
+
+    @Column(name = "DEFAULT_SITE")
+    private boolean defaultSite;
+
+    @Column(name = "DEFAULT_THEME")
+    private String defaultTheme;
+
+    public String getDomainOfSite() {
+        return domainOfSite;
+    }
+
+    public void setDomainOfSite(final String domainOfSite) {
+        this.domainOfSite = domainOfSite;
+    }
+
+    public boolean isDefaultSite() {
+        return defaultSite;
+    }
+
+    public void setDefaultSite(final boolean defaultSite) {
+        this.defaultSite = defaultSite;
+    }
+
+    public String getDefaultTheme() {
+        return defaultTheme;
+    }
+
+    public void setDefaultTheme(final String defaultTheme) {
+        this.defaultTheme = defaultTheme;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 67 * hash + Objects.hashCode(domainOfSite);
+        hash = 67 * hash + (defaultSite ? 1 : 0);
+        hash = 67 * hash + Objects.hashCode(defaultTheme);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+
+        if (!super.canEqual(obj)) {
+            return false;
+        }
+
+        if (!(obj instanceof Site)) {
+            return false;
+        }
+        final Site other = (Site) obj;
+        if (defaultSite != other.isDefaultSite()) {
+            return false;
+        }
+        if (!Objects.equals(domainOfSite, other.getDomainOfSite())) {
+            return false;
+        }
+        return Objects.equals(defaultTheme, other.getDefaultTheme());
+    }
+
+    @Override
+    public boolean canEqual(final Object obj) {
+        return obj instanceof Site;
+    }
+
+    @Override
+    public String toString(final String data) {
+        return super.toString(String.format(", domainOfSite = \"%s\", "
+                                                + "defaultSite = %b, "
+                                                + "defaultTheme = \"%s\"%s",
+                                            domainOfSite,
+                                            defaultSite,
+                                            defaultTheme,
+                                            data));
+    }
+
+}

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

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2017 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.sites;
+
+import org.libreccm.core.AbstractEntityRepository;
+import org.libreccm.core.CcmObjectRepository;
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.RequiresPrivilege;
+
+import java.util.Optional;
+
+import javax.enterprise.context.RequestScoped;
+import javax.persistence.NoResultException;
+import javax.persistence.TypedQuery;
+import javax.transaction.Transactional;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+public class SiteRepository extends AbstractEntityRepository<Long, Site> {
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<Site> findByDomain(final String domain) {
+
+        final TypedQuery<Site> query = getEntityManager()
+            .createNamedQuery("Site.findByDomain", Site.class);
+        query.setParameter("domain", domain);
+
+        try {
+            return Optional.of(query.getSingleResult());
+        } catch (NoResultException ex) {
+            return Optional.empty();
+        }
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    public boolean hasSiteForDomain(final String domain) {
+
+        final TypedQuery<Boolean> query = getEntityManager()
+            .createNamedQuery("Site.hasSiteForDomain", Boolean.class);
+        query.setParameter("domain", domain);
+
+        return query.getSingleResult();
+    }
+
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Override
+    public void save(final Site site) {
+        super.save(site);
+    }
+    
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    @Override
+    public void delete(final Site site) {
+        super.delete(site);
+    }
+
+    @Override
+    public Class<Site> getEntityClass() {
+        return Site.class;
+    }
+
+    @Override
+    public boolean isNew(final Site site) {
+        return site.getObjectId() == 0;
+    }
+    
+}

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

@@ -64,6 +64,19 @@ public interface ThemeProvider {
      */
     Optional<ThemeInfo> getThemeInfo(String theme, ThemeVersion version);
 
+    /**
+     * This method can be used to determine if a theme provider provides a
+     * specific theme.
+     *
+     * @param theme   The name of the theme.
+     * @param version The version. Implementations which do not support
+     *                live/draft themes should ignore this parameter.
+     *
+     * @return {@code true} if the provider has a theme with the provided name
+     *         in the provided version, {@code false} otherwise.
+     */
+    boolean providesTheme(String theme, ThemeVersion version);
+
     /**
      * List all files in a theme at the specified path.
      *

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

@@ -25,6 +25,7 @@ import org.libreccm.core.UnexpectedErrorException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 
 import javax.enterprise.context.RequestScoped;
 import javax.enterprise.inject.Instance;
@@ -66,6 +67,17 @@ public class Themes {
         return themes;
     }
     
+    public Optional<ThemeInfo> getTheme(final String name, final ThemeVersion version) {
+        
+        for(final ThemeProvider provider : providers) {
+            if (provider.providesTheme(name, version)) {
+                return provider.getThemeInfo(name, version);
+            }
+        }
+        
+        return Optional.empty();
+    }
+
     public String process(Map<String, Object> page, ThemeInfo theme) {
 
         final ThemeTypeLiteral themeType = new ThemeTypeLiteral(theme.getType());