diff options
Diffstat (limited to 'winery/org.eclipse.winery.repository/src/main/java/org/eclipse/winery/repository/resources/_support/collections/withoutid/EntityWithoutIdCollectionResource.java')
-rw-r--r-- | winery/org.eclipse.winery.repository/src/main/java/org/eclipse/winery/repository/resources/_support/collections/withoutid/EntityWithoutIdCollectionResource.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/winery/org.eclipse.winery.repository/src/main/java/org/eclipse/winery/repository/resources/_support/collections/withoutid/EntityWithoutIdCollectionResource.java b/winery/org.eclipse.winery.repository/src/main/java/org/eclipse/winery/repository/resources/_support/collections/withoutid/EntityWithoutIdCollectionResource.java new file mode 100644 index 0000000..8255f5d --- /dev/null +++ b/winery/org.eclipse.winery.repository/src/main/java/org/eclipse/winery/repository/resources/_support/collections/withoutid/EntityWithoutIdCollectionResource.java @@ -0,0 +1,114 @@ +/******************************************************************************* + * Copyright (c) 2012-2013 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.withoutid; + +import java.lang.reflect.Constructor; +import java.util.List; + +import javax.ws.rs.Path; +import javax.ws.rs.PathParam; + +import org.eclipse.winery.common.Util; +import org.eclipse.winery.repository.Utils; +import org.eclipse.winery.repository.resources.AbstractComponentInstanceResource; +import org.eclipse.winery.repository.resources._support.IPersistable; +import org.eclipse.winery.repository.resources._support.collections.EntityCollectionResource; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.sun.jersey.api.NotFoundException; + +/** + * Class managing a list of entities. It is intended to manage subresources, + * where the TOSCA specification did not specify a unique key. Currently, the + * hashCode of the XML String representation is used. If other representation + * should be used, the method {@code getEntityResource} has to be overriden. + * + * @param <EntityResourceT> the resource modeling the entity + * @param <EntityT> the entity type of single items in the list + */ +public abstract class EntityWithoutIdCollectionResource<EntityResourceT extends EntityWithoutIdResource<EntityT>, EntityT> extends EntityCollectionResource<EntityResourceT, EntityT> { + + private static final Logger logger = LoggerFactory.getLogger(EntityWithoutIdCollectionResource.class); + + + /** + * {@inheritDoc} + */ + public EntityWithoutIdCollectionResource(Class<EntityResourceT> entityResourceTClazz, Class<EntityT> entityTClazz, List<EntityT> list, IPersistable res) { + super(entityResourceTClazz, entityTClazz, list, res); + } + + /** + * Method searching the list for an id with the hashcode instead of + * getId(EntityT) + */ + @Override + @Path("{id}/") + public EntityResourceT getEntityResource(@PathParam("id") String id) { + id = Util.URLdecode(id); + int idInt; + try { + idInt = Integer.parseInt(id); + } catch (java.lang.NumberFormatException e) { + throw new NotFoundException(id + " is not a valid id"); + } + EntityT entity = null; + int idx = -1; + for (EntityT c : this.list) { + idx++; + // speed optimization - instead of using getId() we directly use the hash code + int hash = Utils.getXMLAsString(c).hashCode(); + if (hash == idInt) { + entity = c; + break; + } + } + if (entity == null) { + throw new NotFoundException(); + } else { + return this.getEntityResourceInstance(entity, idx); + } + } + + @Override + public String getId(EntityT entity) { + return IdDeterminationWithHashCode.INSTANCE.getId(entity); + } + + /** + * {@inheritDoc} + */ + @Override + protected EntityResourceT getEntityResourceInstance(EntityT entity, int idx) { + Constructor<EntityResourceT> constructor; + try { + constructor = this.entityResourceTClazz.getConstructor(this.entityTClazz, int.class, List.class, AbstractComponentInstanceResource.class); + } catch (Exception e) { + try { + constructor = this.entityResourceTClazz.getConstructor(this.entityTClazz, int.class, List.class, IPersistable.class); + } catch (NoSuchMethodException | SecurityException e1) { + EntityWithoutIdCollectionResource.logger.debug("Could not get constructor", e); + throw new IllegalStateException(e); + } + } + EntityResourceT newInstance; + try { + newInstance = constructor.newInstance(entity, idx, this.list, this.res); + } catch (Exception e) { + EntityWithoutIdCollectionResource.logger.debug("Could not instantiate class", e); + throw new IllegalStateException(e); + } + return newInstance; + } + +} |