+++ /dev/null
-/*******************************************************************************
- * Copyright (c) 2012-2013,2015 University of Stuttgart.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * and the Apache License 2.0 which both accompany this distribution,
- * and are available at http://www.eclipse.org/legal/epl-v10.html
- * and http://www.apache.org/licenses/LICENSE-2.0
- *
- * Contributors:
- * Oliver Kopp - initial API and implementation
- *******************************************************************************/
-package org.eclipse.winery.repository.resources._support.collections;
-
-import java.util.List;
-
-import javax.ws.rs.Consumes;
-import javax.ws.rs.DELETE;
-import javax.ws.rs.GET;
-import javax.ws.rs.PUT;
-import javax.ws.rs.Produces;
-import javax.ws.rs.core.MediaType;
-import javax.ws.rs.core.Response;
-import javax.ws.rs.core.Response.Status;
-
-import org.eclipse.winery.repository.Utils;
-import org.eclipse.winery.repository.backend.BackendUtils;
-import org.eclipse.winery.repository.resources._support.IPersistable;
-
-/**
- * Class to hold a single entity residing in a list of entities
- *
- * @param <EntityT> the entity type contained in the list
- */
-public abstract class EntityResource<EntityT> {
-
- // This is non-final as a "PUT" may update the object
- // it might be unnecessary to update this object as the resource is created at each request
- // We update the reference nevertheless to be safe if the resource is used in another context
- protected EntityT o;
-
- protected final int idx;
-
- protected final List<EntityT> list;
-
- protected final IPersistable res;
-
- protected IIdDetermination<EntityT> idDetermination;
-
-
- /**
- *
- * @param idDetermination the object offering determination of an id of
- * EntityT. May be null. If null, then setIdDetermination(obj)
- * has to be called to enable this class functioning properly
- * @param o the object this resource is representing
- * @param idx the index of the object in the list
- * @param list the list, where the object is stored in
- * @param res the resource the object/list belongs to
- */
- public EntityResource(IIdDetermination<EntityT> idDetermination, EntityT o, int idx, List<EntityT> list, IPersistable res) {
- this.idDetermination = idDetermination;
- this.o = o;
- this.idx = idx;
- this.list = list;
- this.res = res;
- }
-
- /**
- * Quick hack for AbstractReqOrCapDefResource which is itself an
- * IIdDetermination
- */
- protected final void setIdDetermination(IIdDetermination<EntityT> idDetermination) {
- this.idDetermination = idDetermination;
- }
-
- @GET
- @Produces(MediaType.APPLICATION_JSON)
- public Response getJSON() {
- assert (this.o != null);
- return Response.ok().entity(this.o).build();
- }
-
- @GET
- @Produces(MediaType.TEXT_XML)
- @SuppressWarnings("unchecked")
- public Response getXML() {
- assert (this.o != null);
- // Utils.getXML has to be used as Jersey can only serialize XMLRootElements
- return Utils.getXML((Class<EntityT>) this.o.getClass(), this.o);
- }
-
- /**
- * Replaces the whole entity by the given entity
- *
- * As we use the hash code as index, the index changes when the resource is
- * updated. This is not in line with REST. The alternative implementation is
- * to use the index in the list as resource identification. That changes at
- * each modification of the list itself (if elements are deleted / inserted
- * before the current entry). When using the hash value, users may
- * concurrently edit items and the list may also be updated
- *
- * @return the new id.
- */
- @PUT
- @Consumes(MediaType.TEXT_XML)
- @Produces(MediaType.TEXT_PLAIN)
- public Response setValue(EntityT o) {
- this.list.set(this.idx, o);
- this.o = o;
- return CollectionsHelper.persist(this.res, this.idDetermination, o);
- }
-
- @DELETE
- public Response onDelete() {
- try {
- this.list.remove(this.idx);
- } catch (IndexOutOfBoundsException e) {
- return Response.status(Status.INTERNAL_SERVER_ERROR).entity("Could not delete entity, even if it should exist").build();
- }
- return BackendUtils.persist(this.res);
- }
-
-}