/*
* Copyright 2011, Nabil Benothman, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package com.ubike.rest.service;
import com.sun.jersey.api.NotFoundException;
import com.ubike.model.Trip;
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 com.sun.jersey.api.view.Viewable;
import javax.ws.rs.WebApplicationException;
import javax.persistence.NoResultException;
import java.util.Collection;
import com.ubike.model.UbikeUser;
import com.ubike.model.Route;
import com.ubike.model.TripSegment;
import com.ubike.rest.converter.TripConverter;
import com.ubike.services.TripServiceLocal;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ws.rs.core.MediaType;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
/**
* {@code TripResource}
* <p></p>
*
* Created on Jun 6, 2011 at 7:17:22 PM
*
* @author <a href="mailto:nabil.benothman@gmail.com">Nabil Benothman</a>
*/
@Stateless
@Component
@Scope("request")
public class TripResource {
@Context
protected UriInfo uriInfo;
@Context
protected ResourceContext resourceContext;
protected Long id;
@EJB
private TripServiceLocal tripService;
/**
* Creates a new instance of TripResource
*/
public TripResource() {
}
/**
* @param id The id to set
*/
public void setId(Long id) {
this.id = id;
}
@GET
@Produces({MediaType.TEXT_HTML})
public Viewable get(@QueryParam("expandLevel") @DefaultValue("0") int expandLevel) {
TripConverter converter = new TripConverter(getEntity(), uriInfo.getAbsolutePath(), expandLevel);
return new Viewable("/tripInfo.jsp", converter.getEntity());
}
/**
* Get method for retrieving an instance of Trip identified by id in XML format.
*
* @param id identifier for the entity
* @return an instance of TripConverter
*/
@GET
@Produces({"application/xml", "application/json"})
public TripConverter getXML(@QueryParam("expandLevel")
@DefaultValue("1") int expandLevel) {
return new TripConverter(getEntity(), uriInfo.getAbsolutePath(),
expandLevel);
}
/**
* Put method for updating an instance of Trip identified by id using XML as the input format.
*
* @param id identifier for the entity
* @param data an TripConverter entity that is deserialized from a XML stream
*/
@PUT
@Consumes({"application/xml", "application/json"})
public void put(TripConverter data) {
updateEntity(getEntity(), data.resolveEntity(this.tripService.getEntityManager()));
}
/**
* Delete method for deleting an instance of Trip identified by id.
*
* @param id identifier for the entity
*/
@DELETE
public void delete() {
deleteEntity(getEntity());
}
/**
* Returns an instance of Trip identified by id.
*
* @param id identifier for the entity
* @return an instance of Trip
*/
public Trip getEntity() {
try {
return this.tripService.findWithMapCode(id);
} catch (NoResultException ex) {
throw new NotFoundException("Resource for " + uriInfo.getAbsolutePath() + " does not exist.",
uriInfo.getAbsolutePath());
}
}
/**
* 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 Trip updateEntity(Trip entity, Trip newEntity) {
UbikeUser owner = entity.getOwner();
UbikeUser ownerNew = newEntity.getOwner();
Collection<TripSegment> segments = entity.getSegments();
Collection<TripSegment> segmentsNew = newEntity.getSegments();
Route route = entity.getRoute();
Route routeNew = newEntity.getRoute();
this.tripService.update(newEntity);
if (owner != null && !owner.equals(ownerNew)) {
owner.getTrips().remove(entity);
}
if (ownerNew != null && !ownerNew.equals(owner)) {
ownerNew.getTrips().add(entity);
}
for (TripSegment value : segments) {
if (!segmentsNew.contains(value)) {
throw new WebApplicationException(new Throwable("Cannot remove items from segments"));
}
}
for (TripSegment value : segmentsNew) {
if (!segments.contains(value)) {
Trip oldEntity = value.getTrip();
value.setTrip(entity);
if (oldEntity != null && !oldEntity.equals(entity)) {
oldEntity.getSegments().remove(value);
}
}
}
if (route != null && !route.equals(routeNew)) {
route.getTrips().remove(entity);
}
if (routeNew != null && !routeNew.equals(route)) {
routeNew.getTrips().add(entity);
}
return entity;
}
/**
* Deletes the entity.
*
* @param entity the entity to delete
*/
protected void deleteEntity(Trip entity) {
UbikeUser owner = entity.getOwner();
if (owner != null) {
owner.getTrips().remove(entity);
}
if (!entity.getSegments().isEmpty()) {
throw new WebApplicationException(new Throwable("Cannot delete entity because segments is not empty."));
}
Route route = entity.getRoute();
if (route != null) {
route.getTrips().remove(entity);
}
this.tripService.remove(id);
}
/**
* Returns a dynamic instance of UbikeUserResource used for entity navigation.
*
* @param id identifier for the parent entity
* @return an instance of UbikeUserResource
*/
@Path("owner/")
public UbikeUserResource getOwnerResource() {
OwnerResourceSub resource = resourceContext.getResource(OwnerResourceSub.class);
resource.setParent(getEntity());
return resource;
}
/**
* Returns a dynamic instance of TripSegmentsResource used for entity navigation.
*
* @param id identifier for the parent entity
* @return an instance of TripSegmentsResource
*/
@Path("segments/")
public TripSegmentsResource getSegmentsResource() {
SegmentsResourceSub resource = resourceContext.getResource(SegmentsResourceSub.class);
resource.setParent(getEntity());
return resource;
}
/**
* Returns a dynamic instance of RouteResource used for entity navigation.
*
* @param id identifier for the parent entity
* @return an instance of RouteResource
*/
@Path("route/")
public RouteResource getRouteResource() {
RouteResourceSub resource = resourceContext.getResource(RouteResourceSub.class);
resource.setParent(getEntity());
return resource;
}
public static class OwnerResourceSub extends UbikeUserResource {
private Trip parent;
public void setParent(Trip parent) {
this.parent = parent;
}
@Override
public UbikeUser getEntity() {
UbikeUser entity = parent.getOwner();
if (entity == null) {
throw new WebApplicationException(new Throwable("Resource for " + uriInfo.getAbsolutePath() + " does not exist."),
404);
}
return entity;
}
}
public static class SegmentsResourceSub extends TripSegmentsResource {
private Trip parent;
public void setParent(Trip parent) {
this.parent = parent;
}
@Override
protected Collection<TripSegment> getEntities(int start, int max,
String query) {
Collection<TripSegment> result = new java.util.ArrayList<TripSegment>();
int index = 0;
for (TripSegment e : parent.getSegments()) {
if (index >= start && (index - start) < max) {
result.add(e);
}
index++;
}
return result;
}
}
public static class RouteResourceSub extends RouteResource {
private Trip parent;
public void setParent(Trip parent) {
this.parent = parent;
}
@Override
protected Route getEntity() {
Route entity = parent.getRoute();
if (entity == null) {
throw new WebApplicationException(new Throwable("Resource for " + uriInfo.getAbsolutePath() + " does not exist."),
404);
}
return entity;
}
}
}