/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt 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 org.richfaces.photoalbum.rest;
import static javax.ws.rs.core.MediaType.APPLICATION_JSON;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.enterprise.context.RequestScoped;
import javax.inject.Inject;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import javax.validation.ValidationException;
import javax.validation.Validator;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Response;
import org.richfaces.photoalbum.manager.EventManager;
import org.richfaces.photoalbum.model.Event;
import org.richfaces.photoalbum.model.actions.IEventAction;
@Path("/events")
@RequestScoped
public class EventRESTService {
@Inject
IEventAction ea;
@Inject
EventManager evm;
@Inject
private Validator validator;
@GET
@Path("/all")
@Produces(APPLICATION_JSON)
public List<Event> getAllEvents() {
return evm.getAllEvents();
}
@GET
@Path("/{id:[0-9][0-9]*}")
@Produces(APPLICATION_JSON)
public Event lookupEventById(@PathParam("id") long id) {
Event event = evm.getEventById(id);
if (event == null) {
throw new WebApplicationException(Response.Status.NOT_FOUND);
}
return event;
}
@POST
@Consumes(APPLICATION_JSON)
@Produces(APPLICATION_JSON)
public Response createEvent(Event event) {
Response.ResponseBuilder builder = null;
try {
validateEvent(event);
ea.addEvent(event);
// Create an "ok" response
builder = Response.ok();
} catch (ConstraintViolationException ce) {
// Handle bean validation issues
builder = createViolationResponse(ce.getConstraintViolations());
} catch (ValidationException e) {
// Handle the unique constrain violation
Map<String, String> responseObj = new HashMap<String, String>();
responseObj.put("name", "Name taken");
builder = Response.status(Response.Status.CONFLICT).entity(responseObj);
} catch (Exception e) {
// Handle generic exceptions
Map<String, String> responseObj = new HashMap<String, String>();
responseObj.put("error", e.getMessage());
builder = Response.status(Response.Status.BAD_REQUEST).entity(responseObj);
}
return builder.build();
}
private void validateEvent(Event event) throws ConstraintViolationException, ValidationException {
Set<ConstraintViolation<Event>> violations = validator.validate(event);
if (!violations.isEmpty()) {
throw new ConstraintViolationException(new HashSet<ConstraintViolation<?>>(violations));
}
if (nameAlreadyExists(event.getName())) {
throw new ValidationException("Unique Name Violation");
}
}
public boolean nameAlreadyExists(String name) {
return ea.getEventByName(name) != null;
}
/**
* Creates a JAX-RS "Bad Request" response including a map of all violation fields, and their message. This can then be used
* by clients to show violations.
*
* @param violations A set of violations that needs to be reported
* @return JAX-RS response containing all violations
*/
private Response.ResponseBuilder createViolationResponse(Set<ConstraintViolation<?>> violations) {
Map<String, String> responseObj = new HashMap<String, String>();
for (ConstraintViolation<?> violation : violations) {
responseObj.put(violation.getPropertyPath().toString(), violation.getMessage());
}
return Response.status(Response.Status.BAD_REQUEST).entity(responseObj);
}
}