/*
* 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.model.actions;
import java.util.List;
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import org.richfaces.photoalbum.model.Shelf;
import org.richfaces.photoalbum.model.User;
import org.richfaces.photoalbum.util.Constants;
import org.richfaces.photoalbum.util.PhotoAlbumException;
/**
* Class for manipulating with shelf entity. Analogous to DAO pattern. EJB3 Bean
*
* @author Andrey Markhel
*/
@Stateless
public class ShelfAction implements IShelfAction {
@Inject
private EntityManager em;
/**
* Persist shelf entity to database
*
* @param shelf - shelf to add
* @throws PhotoAlbumException
*/
public void addShelf(Shelf shelf) throws PhotoAlbumException {
try {
em.persist(shelf);
// Add reference to user
shelf.getOwner().addShelf(shelf);
em.flush();
} catch (Exception e) {
throw new PhotoAlbumException(e.getMessage());
}
}
/**
* Remove shelf entity from database
*
* @param shelf - shelf to delete
* @throws PhotoAlbumException
*/
public void deleteShelf(Shelf shelf) throws PhotoAlbumException {
User owner = em.find(User.class, shelf.getOwner().getId());
try {
em.remove(em.merge(shelf));
owner.removeShelf(shelf);
em.merge(owner);
em.flush();
//shelf.setOwner(owner);
} catch (Exception e) {
owner.addShelf(shelf);
throw new PhotoAlbumException(e.getMessage());
}
}
/**
* Synchronize state of shelf entity with database
*
* @param shelf - shelf to Synchronize
* @throws PhotoAlbumException
*/
public void editShelf(Shelf shelf) throws PhotoAlbumException {
try {
em.merge(shelf);
em.flush();
} catch (Exception e) {
throw new PhotoAlbumException(e.getMessage());
}
}
/**
* Return list of shared shelves(pre-defined)
*
* @param shelf - shelf to Synchronize
*/
@SuppressWarnings("unchecked")
public List<Shelf> getPredefinedShelves() {
return em.createNamedQuery(Constants.USER_SHELVES_QUERY).getResultList();
}
/**
* Refresh state of given shelf
*
* @param shelf - shelf to Synchronize
*/
public void resetShelf(Shelf shelf) {
em.refresh(shelf);
}
}