/*
* Copyright (c) 2008 Boulder Community Foundation - iVolunteer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package service;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.DELETE;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.QueryParam;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import com.sun.jersey.api.core.ResourceContext;
import javax.ws.rs.WebApplicationException;
import javax.persistence.NoResultException;
import javax.persistence.EntityManager;
import java.util.Collection;
import persistence.Filter;
import converter.TimeframeConverter;
import persistence.Timeframe;
/**
*
* @author Dave Angulo
*/
public class TimeframeResource {
@Context
protected UriInfo uriInfo;
@Context
protected ResourceContext resourceContext;
protected String id;
/** Creates a new instance of TimeframeResource */
public TimeframeResource() {
}
public void setId(String id) {
this.id = id;
}
/**
* Get method for retrieving an instance of Timeframe identified by id in
* XML format.
*
* @param id
* identifier for the entity
* @return an instance of TimeframeConverter
*/
@GET
@Produces( { "application/xml", "application/json" })
public TimeframeConverter get(@QueryParam("expandLevel") @DefaultValue("1") int expandLevel) {
PersistenceService persistenceSvc = PersistenceService.getInstance();
try {
persistenceSvc.beginTx();
return new TimeframeConverter(getEntity(), uriInfo.getAbsolutePath(), expandLevel);
} finally {
PersistenceService.getInstance().close();
}
}
/**
* Put method for updating an instance of Timeframe identified by id using
* XML as the input format.
*
* @param id
* identifier for the entity
* @param data
* an TimeframeConverter entity that is deserialized from a XML
* stream
*/
@PUT
@Consumes( { "application/xml", "application/json" })
public void put(TimeframeConverter data) {
PersistenceService persistenceSvc = PersistenceService.getInstance();
try {
persistenceSvc.beginTx();
EntityManager em = persistenceSvc.getEntityManager();
updateEntity(getEntity(), data.resolveEntity(em));
persistenceSvc.commitTx();
} finally {
persistenceSvc.close();
}
}
/**
* Delete method for deleting an instance of Timeframe identified by id.
*
* @param id
* identifier for the entity
*/
@DELETE
public void delete() {
PersistenceService persistenceSvc = PersistenceService.getInstance();
try {
persistenceSvc.beginTx();
deleteEntity(getEntity());
persistenceSvc.commitTx();
} finally {
persistenceSvc.close();
}
}
/**
* Returns an instance of Timeframe identified by id.
*
* @param id
* identifier for the entity
* @return an instance of Timeframe
*/
protected Timeframe getEntity() {
EntityManager em = PersistenceService.getInstance().getEntityManager();
try {
return (Timeframe) em.createQuery("SELECT e FROM Timeframe e where e.id = :id")
.setParameter("id", id).getSingleResult();
} catch (NoResultException ex) {
throw new WebApplicationException(new Throwable("Resource for "
+ uriInfo.getAbsolutePath() + " does not exist."), 404);
}
}
/**
* Updates entity using data from newEntity.
*
* @param entity
* the entity to update
* @param newEntity
* the entity containing the new data
* @return the updated entity
*/
protected Timeframe updateEntity(Timeframe entity, Timeframe newEntity) {
EntityManager em = PersistenceService.getInstance().getEntityManager();
Collection<Filter> filterCollection = entity.getFilterCollection();
Collection<Filter> filterCollectionNew = newEntity.getFilterCollection();
entity = em.merge(newEntity);
for (Filter value : filterCollection) {
if (!filterCollectionNew.contains(value)) {
throw new WebApplicationException(new Throwable(
"Cannot remove items from filterCollection"));
}
}
for (Filter value : filterCollectionNew) {
if (!filterCollection.contains(value)) {
Timeframe oldEntity = value.getTimeframeId();
value.setTimeframeId(entity);
if (oldEntity != null && !oldEntity.equals(entity)) {
oldEntity.getFilterCollection().remove(value);
}
}
}
return entity;
}
/**
* Deletes the entity.
*
* @param entity
* the entity to deletle
*/
protected void deleteEntity(Timeframe entity) {
EntityManager em = PersistenceService.getInstance().getEntityManager();
if (!entity.getFilterCollection().isEmpty()) {
throw new WebApplicationException(new Throwable(
"Cannot delete entity because filterCollection is not empty."));
}
em.remove(entity);
}
/**
* Returns a dynamic instance of FiltersResource used for entity navigation.
*
* @param id
* identifier for the parent entity
* @return an instance of FiltersResource
*/
@Path("filterCollection/")
public FiltersResource getFilterCollectionResource() {
FilterCollectionResourceSub resource = resourceContext
.getResource(FilterCollectionResourceSub.class);
resource.setParent(getEntity());
return resource;
}
public static class FilterCollectionResourceSub extends FiltersResource {
private Timeframe parent;
public void setParent(Timeframe parent) {
this.parent = parent;
}
@Override
protected Collection<Filter> getEntities(int start, int max, String query) {
Collection<Filter> result = new java.util.ArrayList<Filter>();
int index = 0;
for (Filter e : parent.getFilterCollection()) {
if (index >= start && (index - start) < max) {
result.add(e);
}
index++;
}
return result;
}
}
}