CCM NG: More functions to retrieve PageModel data

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@5379 8810af33-2d31-482b-a856-94f89814c4df

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

@@ -35,6 +35,8 @@ import javax.persistence.Inheritance;
 import javax.persistence.InheritanceType;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
 import javax.persistence.Table;
 
 /**
@@ -50,6 +52,13 @@ import javax.persistence.Table;
 @Entity
 @Inheritance(strategy = InheritanceType.JOINED)
 @Table(name = "PAGE_MODEL_COMPONENT_MODELS", schema = CoreConstants.DB_SCHEMA)
+@NamedQueries({
+    @NamedQuery(name = "ComponentModel.findComponentByContainerAndKey",
+                query = "SELECT c "
+                            + "FROM ComponentModel c "
+                            + "WHERE c.container = :container "
+                            + "AND c.key = :key")
+})
 public class ComponentModel implements Serializable {
 
     private static final long serialVersionUID = 8585775139379396806L;

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

@@ -162,4 +162,22 @@ public class ComponentModelRepository
         }
     }
 
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Optional<ComponentModel> findComponentByContainerAndKey(
+        final ContainerModel containerModel,
+        final String componentKey) {
+
+        final TypedQuery<ComponentModel> query = getEntityManager()
+        .createNamedQuery("ComponentModel.findComponentByContainerAndKey", 
+                          ComponentModel.class);
+        query.setParameter("container", containerModel);
+        query.setParameter("key", componentKey);
+        
+        try {
+            return Optional.of(query.getSingleResult());
+        } catch(NoResultException ex) {
+            return Optional.empty();
+        }
+    }
+
 }

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

@@ -88,13 +88,14 @@ public class ContainerModelRepository
         final String key, final PageModel pageModel) {
 
         final TypedQuery<ContainerModel> query = getEntityManager()
-            .createNamedQuery("ContainerModel.findByKeyAndPage", ContainerModel.class);
+            .createNamedQuery("ContainerModel.findByKeyAndPage",
+                              ContainerModel.class);
         query.setParameter("key", key);
         query.setParameter("pageModel", pageModel);
 
         try {
             return Optional.of(query.getSingleResult());
-        } catch(NoResultException ex) {
+        } catch (NoResultException ex) {
             return Optional.empty();
         }
     }

ccm-core/src/main/java/org/libreccm/pagemodel/rs/Components.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2018 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.pagemodel.rs;
+
+import org.libreccm.core.CoreConstants;
+import org.libreccm.pagemodel.ComponentModel;
+import org.libreccm.pagemodel.ContainerModel;
+import org.libreccm.pagemodel.PageModel;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.web.CcmApplication;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonArrayBuilder;
+import javax.json.JsonObject;
+import javax.json.JsonObjectBuilder;
+import javax.transaction.Transactional;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Path("/")
+public class Components {
+
+    @Inject
+    private PageModelsController controller;
+
+    @GET
+    @Path(PageModelsApp.COMPONENTS_PATH)
+    @Produces("application/json; charset=utf-8")
+    @Transactional(Transactional.TxType.REQUIRED)
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    public JsonArray getComponents(
+        @PathParam(PageModelsApp.APP_NAME) final String appPath,
+        @PathParam(PageModelsApp.PAGE_MODEL_NAME) final String pageModelName,
+        @PathParam(PageModelsApp.CONTAINER_KEY) final String containerKey) {
+
+        final CcmApplication app = controller.findCcmApplication(
+            String.format("/%s/", appPath));
+        final PageModel pageModel = controller.findPageModel(app,
+                                                             pageModelName);
+        final ContainerModel container = controller.findContainer(app,
+                                                                  pageModel,
+                                                                  containerKey);
+
+        final JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
+        container
+            .getComponents()
+            .stream()
+            .map(component -> mapComponentModelToJson(component))
+            .forEach(arrayBuilder::add);
+
+        return arrayBuilder.build();
+    }
+
+    @GET
+    @Path(PageModelsApp.COMPONENT_PATH)
+    @Produces("application/json; charset=utf-8")
+    @Transactional(Transactional.TxType.REQUIRED)
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    public JsonObject getComponent(
+        @PathParam(PageModelsApp.APP_NAME) final String appPath,
+        @PathParam(PageModelsApp.PAGE_MODEL_NAME) final String pageModelName,
+        @PathParam(PageModelsApp.CONTAINER_KEY) final String containerKey,
+        @PathParam(PageModelsApp.COMPONENT_KEY) final String componentKey) {
+
+        final CcmApplication app = controller.findCcmApplication(
+            String.format("/%s/", appPath));
+        final PageModel pageModel = controller.findPageModel(app,
+                                                             pageModelName);
+        final ContainerModel container = controller.findContainer(app,
+                                                                  pageModel,
+                                                                  containerKey);
+        final ComponentModel component = controller
+            .findComponentModel(app, pageModel, container, componentKey);
+
+        return mapComponentModelToJson(component);
+    }
+
+    private JsonObject mapComponentModelToJson(
+        final ComponentModel componentModel) {
+
+        final JsonObjectBuilder objectBuilder = Json
+            .createObjectBuilder()
+            .add("componentModelId",
+                 Long.toString(componentModel.getComponentModelId()))
+            .add("uuid", componentModel.getUuid())
+            .add("modelUuid", componentModel.getModelUuid())
+            .add("key", componentModel.getKey())
+            .add("type", componentModel.getClass().getName());
+
+        if (componentModel.getIdAttribute() != null) {
+            objectBuilder.add("idAttribute", componentModel.getIdAttribute());
+        }
+
+        if (componentModel.getClassAttribute() != null) {
+            objectBuilder.add("classAttribute",
+                              componentModel.getClassAttribute());
+        }
+
+        if (componentModel.getStyleAttribute() != null) {
+            objectBuilder.add("styleAttribute",
+                              componentModel.getStyleAttribute());
+        }
+
+        return objectBuilder.build();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/pagemodel/rs/Containers.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2018 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.pagemodel.rs;
+
+import org.libreccm.core.CoreConstants;
+import org.libreccm.pagemodel.ContainerModel;
+import org.libreccm.pagemodel.PageModel;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+import org.libreccm.web.CcmApplication;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonArrayBuilder;
+import javax.json.JsonObject;
+import javax.transaction.Transactional;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+@Path("/")
+public class Containers {
+
+    @Inject
+    private PageModelsController controller;
+
+    @GET
+    @Path(PageModelsApp.CONTAINERS_PATH)
+    @Produces("application/json; charset=utf-8")
+    @Transactional(Transactional.TxType.REQUIRED)
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    public JsonArray getContainers(
+        @PathParam(PageModelsApp.APP_NAME) final String appPath,
+        @PathParam(PageModelsApp.PAGE_MODEL_NAME) final String pageModelName) {
+
+        final CcmApplication app = controller.findCcmApplication(
+            String.format("/%s/", appPath));
+
+        final PageModel pageModel = controller.findPageModel(app,
+                                                             pageModelName);
+
+        final JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
+        pageModel
+            .getContainers()
+            .stream()
+            .map(containerModel -> mapContainerModelToJson(containerModel))
+            .forEach(arrayBuilder::add);
+
+        return arrayBuilder.build();
+    }
+
+    @GET
+    @Path(PageModelsApp.CONTAINER_PATH)
+    @Produces("application/json; charset=utf-8")
+    @Transactional(Transactional.TxType.REQUIRED)
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
+    public JsonObject getContainer(
+        @PathParam(PageModelsApp.APP_NAME) final String appPath,
+        @PathParam(PageModelsApp.PAGE_MODEL_NAME) final String pageModelName,
+        @PathParam(PageModelsApp.CONTAINER_KEY) final String containerKey) {
+
+        final CcmApplication app = controller.findCcmApplication(
+            String.format("/%s/", appPath));
+
+        final PageModel pageModel = controller.findPageModel(app,
+                                                             pageModelName);
+
+        final ContainerModel container = controller.findContainer(app,
+                                                                  pageModel,
+                                                                  containerKey);
+
+        return mapContainerModelToJson(container);
+    }
+
+    private JsonObject mapContainerModelToJson(
+        final ContainerModel containerModel) {
+
+        return Json
+            .createObjectBuilder()
+            .add("containerId", Long.toString(containerModel.getContainerId()))
+            .add("uuid", containerModel.getUuid())
+            .add("containerUuid", containerModel.getContainerUuid())
+            .add("key", containerModel.getKey())
+            .build();
+    }
+
+}

ccm-core/src/main/java/org/libreccm/pagemodel/rs/PageModels.java

@@ -20,30 +20,25 @@ package org.libreccm.pagemodel.rs;
 
 import org.libreccm.core.CoreConstants;
 import org.libreccm.l10n.GlobalizationHelper;
-import org.libreccm.pagemodel.ComponentModel;
 import org.libreccm.pagemodel.ComponentModelRepository;
-import org.libreccm.pagemodel.ContainerModel;
 import org.libreccm.pagemodel.ContainerModelRepository;
 import org.libreccm.pagemodel.PageModel;
 import org.libreccm.pagemodel.PageModelRepository;
 import org.libreccm.security.AuthorizationRequired;
 import org.libreccm.security.RequiresPrivilege;
-import org.libreccm.web.ApplicationRepository;
 import org.libreccm.web.CcmApplication;
 
-import java.util.HashMap;
-import java.util.Map;
-
 import javax.enterprise.context.RequestScoped;
 import javax.inject.Inject;
 import javax.json.Json;
 import javax.json.JsonArray;
 import javax.json.JsonArrayBuilder;
 import javax.json.JsonObject;
-import javax.json.JsonObjectBuilder;
 import javax.transaction.Transactional;
+import javax.ws.rs.Consumes;
 import javax.ws.rs.GET;
 import javax.ws.rs.NotFoundException;
+import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
@@ -53,11 +48,11 @@ import javax.ws.rs.Produces;
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @RequestScoped
-@Path("/{appPath}")
+@Path("/")
 public class PageModels {
 
     @Inject
-    private ApplicationRepository appRepo;
+    private PageModelsController controller;
 
     @Inject
     private ComponentModelRepository componentModelRepo;
@@ -77,7 +72,7 @@ public class PageModels {
 //    @Transactional(Transactional.TxType.REQUIRED)
 //    @AuthorizationRequired
 //    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
-//    public List<Map<String, String>> findAllPageModels(
+//    public List<Map<String, String>> getAllPageModels(
 //        @PathParam("appPath") String appPath) {
 //
 //        final CcmApplication app = findCcmApplication(
@@ -90,16 +85,16 @@ public class PageModels {
 //    }
     @GET
 //    @Path("/{appPath}")
-    @Path("/")
+    @Path(PageModelsApp.PAGE_MODELS_PATH)
     @Produces("application/json; charset=utf-8")
     @Transactional(Transactional.TxType.REQUIRED)
     @AuthorizationRequired
     @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
-    public JsonArray findAllPageModels(
+    public JsonArray getAllPageModels(
-        @PathParam("appPath") String appPath) {
+        @PathParam(PageModelsApp.APP_NAME) String appPath) {
 
-        final CcmApplication app = findCcmApplication(
+        final CcmApplication app = controller
-            String.format("/%s/", appPath));
+            .findCcmApplication(String.format("/%s/", appPath));
         final JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
         pageModelRepo
             .findDraftByApplication(app)
@@ -111,135 +106,49 @@ public class PageModels {
     }
 
     @GET
-//    @Path("/{appPath}/{pageModelName}")
+    @Path(PageModelsApp.PAGE_MODEL_PATH)
-    @Path("/{pageModelName}")
     @Produces("application/json; charset=utf-8")
     @Transactional(Transactional.TxType.REQUIRED)
     @AuthorizationRequired
     @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
-    public JsonObject findPageModel(
+    public JsonObject getPageModel(
-        @PathParam("appPath") final String appPath,
+        @PathParam(PageModelsApp.APP_NAME) final String appPath,
-        @PathParam("pageModelName") final String pageModelName) {
+        @PathParam(PageModelsApp.PAGE_MODEL_NAME) final String pageModelName) {
 
-        final CcmApplication app = findCcmApplication(
+        final CcmApplication app = controller
-            String.format("/%s/", appPath));
+            .findCcmApplication(String.format("/%s/", appPath));
-
+        final PageModel pageModel = controller.findPageModel(app,
-        final PageModel pageModel = pageModelRepo
+                                                             pageModelName);
-            .findDraftByApplicationAndName(app, pageModelName)
-            .orElseThrow(() -> new NotFoundException(String.format(
-            "No PageModel with name \"%s\" for application \"%s\".",
-            pageModelName, appPath)));
         return mapPageModelToJson(pageModel);
     }
 
-    @GET
+    @PUT
-//    @Path("/{appPath}/{pageModelName}/containers")
+    @Path(PageModelsApp.PAGE_MODEL_PATH)
-    @Path("/{pageModelName}/containers")
+    @Consumes("application/json; charset=utf-8")
     @Produces("application/json; charset=utf-8")
     @Transactional(Transactional.TxType.REQUIRED)
     @AuthorizationRequired
     @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
-    public JsonArray getContainers(
+    public JsonObject putPageModel(
-        @PathParam("appPath") final String appPath,
+        @PathParam(PageModelsApp.APP_NAME) final String appPath,
-        @PathParam("pageModelName") final String pageModelName) {
+        @PathParam(PageModelsApp.PAGE_MODEL_NAME) final String pageModelName,
+        final JsonObject pageModelJson) {
 
-        final CcmApplication app = findCcmApplication(
+        final CcmApplication app = controller
-            String.format("/%s/", appPath));
+            .findCcmApplication(String.format("/%s/", appPath));
 
-        final PageModel pageModel = pageModelRepo
+        final PageModel pageModel;
-            .findDraftByApplicationAndName(app, pageModelName)
+        if (controller.existsPageModel(app, pageModelName)) {
-            .orElseThrow(() -> new NotFoundException(String.format(
+            pageModel = controller.findPageModel(app, pageModelName);
-            "No PageModel with name \"%s\" for application \"%s\".",
+        } else {
-            pageModelName, appPath)));
+            pageModel = new PageModel();
-
+            pageModel.setApplication(app);
-        final JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
-        pageModel
-            .getContainers()
-            .stream()
-            .map(containerModel -> mapContainerModelToJson(containerModel))
-            .forEach(arrayBuilder::add);
-
-        return arrayBuilder.build();
         }
+        pageModel.setName(pageModelName);
         
-    @GET
+        controller.savePageModel(pageModel);
-    @Path("/{pageModelName}/containers/{key}")
-    @Produces("application/json; charset=utf-8")
-    @Transactional(Transactional.TxType.REQUIRED)
-    @AuthorizationRequired
-    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
-    public JsonObject getContainer(
-        @PathParam("appPath") final String appPath,
-        @PathParam("pageModelName") final String pageModelName,
-        @PathParam("key") final String key) {
         
-        final CcmApplication app = findCcmApplication(
+        return mapPageModelToJson(controller.findPageModel(app, pageModelName));
-            String.format("/%s/", appPath));
-
-        final PageModel pageModel = pageModelRepo
-            .findDraftByApplicationAndName(app, pageModelName)
-            .orElseThrow(() -> new NotFoundException(String.format(
-            "No PageModel with name \"%s\" for application \"%s\".",
-            pageModelName, appPath)));
-
-        final ContainerModel container = containerRepo
-            .findContainerByKeyAndPageModel(key, pageModel)
-            .orElseThrow(() -> new NotFoundException(String
-            .format("The PageModel \"%s\" of application \"%s\" does not have "
-                        + "a container identified by the key \"%s\".",
-                    pageModelName,
-                    appPath,
-                    key)));
-
-        return mapContainerModelToJson(container);
-    }
-
-    @GET
-    @Path("/{pageModelName}/containers/{key}/components")
-    @Produces("application/json; charset=utf-8")
-    @Transactional(Transactional.TxType.REQUIRED)
-    @AuthorizationRequired
-    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
-    public JsonArray getComponents(
-        @PathParam("appPath") final String appPath,
-        @PathParam("pageModelName") final String pageModelName,
-        @PathParam("key") final String key) {
-
-        final CcmApplication app = findCcmApplication(
-            String.format("/%s/", appPath));
-
-        final PageModel pageModel = pageModelRepo
-            .findDraftByApplicationAndName(app, pageModelName)
-            .orElseThrow(() -> new NotFoundException(String.format(
-            "No PageModel with name \"%s\" for application \"%s\".",
-            pageModelName, appPath)));
-
-        final ContainerModel container = containerRepo
-            .findContainerByKeyAndPageModel(key, pageModel)
-            .orElseThrow(() -> new NotFoundException(String
-            .format("The PageModel \"%s\" of application \"%s\" does not have "
-                        + "a container identified by the key \"%s\".",
-                    pageModelName,
-                    appPath,
-                    key)));
-
-        final JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
-        container
-            .getComponents()
-            .stream()
-            .map(component -> mapComponentModelToJson(component))
-            .forEach(arrayBuilder::add);
-
-        return arrayBuilder.build();
-    }
-
-    private CcmApplication findCcmApplication(final String appPath) {
-
-        return appRepo
-            .retrieveApplicationForPath(appPath)
-            .orElseThrow(() -> new NotFoundException(String
-            .format("No application with path \"%s\" found.",
-                    appPath)));
     }
 
     private JsonObject mapPageModelToJson(final PageModel pageModel) {
@@ -261,65 +170,4 @@ public class PageModels {
             .build();
     }
 
-    private Map<String, String> mapPageModelToDataMap(final PageModel pageModel) {
-
-        final Map<String, String> dataMap = new HashMap<>();
-
-        dataMap.put("description",
-                    globalizationHelper
-                        .getValueFromLocalizedString(pageModel.getDescription()));
-        dataMap.put("modelUuid", pageModel.getModelUuid());
-        dataMap.put("name", pageModel.getName());
-        dataMap.put("pageModelId", Long.toString(pageModel.getPageModelId()));
-        dataMap.put("title",
-                    globalizationHelper
-                        .getValueFromLocalizedString(pageModel.getTitle()));
-        dataMap.put("type", pageModel.getType());
-        dataMap.put("uuid", pageModel.getUuid());
-        dataMap.put("version", pageModel.getVersion().toString());
-
-        return dataMap;
-    }
-
-    private JsonObject mapContainerModelToJson(
-        final ContainerModel containerModel) {
-
-        return Json
-            .createObjectBuilder()
-            .add("containerId", Long.toString(containerModel.getContainerId()))
-            .add("uuid", containerModel.getUuid())
-            .add("containerUuid", containerModel.getContainerUuid())
-            .add("key", containerModel.getKey())
-            .build();
-    }
-
-    private JsonObject mapComponentModelToJson(
-        final ComponentModel componentModel) {
-
-        final JsonObjectBuilder objectBuilder = Json
-            .createObjectBuilder()
-            .add("componentModelId",
-                 Long.toString(componentModel.getComponentModelId()))
-            .add("uuid", componentModel.getUuid())
-            .add("modelUuid", componentModel.getModelUuid())
-            .add("key", componentModel.getKey())
-            .add("type", componentModel.getClass().getName());
-
-        if (componentModel.getIdAttribute() != null) {
-            objectBuilder.add("idAttribute", componentModel.getIdAttribute());
-        }
-
-        if (componentModel.getClassAttribute() != null) {
-            objectBuilder.add("classAttribute",
-                              componentModel.getClassAttribute());
-        }
-
-        if (componentModel.getStyleAttribute() != null) {
-            objectBuilder.add("styleAttribute",
-                              componentModel.getStyleAttribute());
-        }
-
-        return objectBuilder.build();
-    }
-
 }

ccm-core/src/main/java/org/libreccm/pagemodel/rs/PageModelsApp.java

@@ -35,11 +35,36 @@ import javax.ws.rs.core.Application;
 @ApplicationPath("/page-models")
 public class PageModelsApp extends Application {
 
+    protected static final String APP_NAME = "appName";
+    protected static final String PAGE_MODEL_NAME = "pageModelName";
+    protected static final String CONTAINER_KEY = "containerKey";
+    protected static final String COMPONENT_KEY = "componentKey";
+
+    protected static final String PAGE_MODELS_PATH = "/{" + APP_NAME + "}";
+    protected static final String PAGE_MODEL_PATH = PAGE_MODELS_PATH
+                                                        + "/{"
+                                                        + PAGE_MODEL_NAME
+                                                        + "}";
+    protected static final String CONTAINERS_PATH = PAGE_MODEL_PATH
+                                                        + "/containers";
+    protected static final String CONTAINER_PATH = CONTAINERS_PATH
+                                                       + "/{" 
+                                                   + CONTAINER_KEY
+                                                       + "}";
+    protected static final String COMPONENTS_PATH = CONTAINER_PATH
+                                                        + "/components";
+    protected static final String COMPONENT_PATH = COMPONENTS_PATH
+                                                       + "/{"  
+                                                   + COMPONENT_KEY 
+                                                   + "}";
+
     @Override
     public Set<Class<?>> getClasses() {
 
         final Set<Class<?>> classes = new HashSet<>();
         classes.add(PageModels.class);
+        classes.add(Containers.class);
+        classes.add(Components.class);
 
         return classes;
     }

ccm-core/src/main/java/org/libreccm/pagemodel/rs/PageModelsController.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 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.pagemodel.rs;
+
+import org.libreccm.pagemodel.ComponentModel;
+import org.libreccm.pagemodel.ComponentModelRepository;
+import org.libreccm.pagemodel.ContainerModel;
+import org.libreccm.pagemodel.ContainerModelRepository;
+import org.libreccm.pagemodel.PageModel;
+import org.libreccm.pagemodel.PageModelRepository;
+import org.libreccm.web.ApplicationRepository;
+import org.libreccm.web.CcmApplication;
+
+import java.util.Objects;
+
+import javax.enterprise.context.RequestScoped;
+import javax.inject.Inject;
+import javax.transaction.Transactional;
+import javax.ws.rs.NotFoundException;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@RequestScoped
+class PageModelsController {
+
+    @Inject
+    private ApplicationRepository appRepo;
+
+    @Inject
+    private ComponentModelRepository componentModelRepo;
+
+    @Inject
+    private ContainerModelRepository containerRepo;
+
+    @Inject
+    private PageModelRepository pageModelRepo;
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected CcmApplication findCcmApplication(final String appPath) {
+
+        return appRepo
+            .retrieveApplicationForPath(Objects.requireNonNull(appPath))
+            .orElseThrow(() -> new NotFoundException(String
+            .format("No application with path \"%s\" found.",
+                    appPath)));
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected ComponentModel findComponentModel(
+        final CcmApplication app,
+        final PageModel pageModel,
+        final ContainerModel containerModel,
+        final String componentKey) {
+
+        return componentModelRepo
+            .findComponentByContainerAndKey(containerModel, componentKey)
+            .orElseThrow(() -> new NotFoundException(String
+            .format("The Container \"%s\" of the PageModel \"%s\" of application"
+                + "\"%s\" does not contain a component with the key \"%s\".",
+                    containerModel.getKey(),
+                    pageModel.getName(),
+                    app.getPrimaryUrl(),
+                    componentKey)));
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected ContainerModel findContainer(final CcmApplication app,
+                                           final PageModel pageModel,
+                                           final String containerKey) {
+
+        return containerRepo
+            .findContainerByKeyAndPageModel(
+                Objects.requireNonNull(containerKey),
+                Objects.requireNonNull(pageModel))
+            .orElseThrow(() -> new NotFoundException(String
+            .format("The PageModel \"%s\" of application \"%s\" does not have "
+                        + "a container identified by the key \"%s\".",
+                    pageModel.getName(),
+                    app.getPrimaryUrl(),
+                    containerKey)));
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected boolean existsPageModel(final CcmApplication app,
+                                      final String pageModelName) {
+        return pageModelRepo
+            .findDraftByApplicationAndName(app, pageModelName)
+            .isPresent();
+    }
+    
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected PageModel findPageModel(final CcmApplication app,
+                                      final String pageModelName) {
+
+        return pageModelRepo
+            .findDraftByApplicationAndName(
+                Objects.requireNonNull(app),
+                Objects.requireNonNull(pageModelName))
+            .orElseThrow(() -> new NotFoundException(String.format(
+            "No PageModel with name \"%s\" for application \"%s\".",
+            pageModelName, app.getPrimaryUrl())));
+    }
+    
+    @Transactional(Transactional.TxType.REQUIRED)
+    protected void savePageModel(final PageModel pageModel) {
+        pageModelRepo.save(pageModel);
+    }
+
+}