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/*******************************************************************************
* 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;
}
}
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