/*
* 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 javax.ejb.Stateless;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import org.richfaces.photoalbum.model.Album;
import org.richfaces.photoalbum.model.Shelf;
import org.richfaces.photoalbum.util.PhotoAlbumException;
/**
* Class for manipulating with album entity. Analogous to DAO pattern. EJB3 Bean
*
* @author Andrey Markhel
*/
@Stateless
public class AlbumAction implements IAlbumAction {
@Inject
EntityManager em;
/**
* Persist album entity to database
*
* @param album - album to add
* @throws PhotoAlbumException
*/
public void addAlbum(Album album) throws PhotoAlbumException {
try {
em.persist(album);
album.getShelf().addAlbum(album);
em.flush();
} catch (Exception e) {
throw new PhotoAlbumException(e.getMessage());
}
}
/**
* Remove album entity from database
*
* @param album - album to delete
* @throws PhotoAlbumException
*/
public void deleteAlbum(Album album) throws PhotoAlbumException {
Shelf parentShelf = em.find(Shelf.class, album.getShelf().getId());
try {
if (parentShelf == null) {
return;
}
em.remove(em.merge(album));
parentShelf.removeAlbum(album);
em.merge(parentShelf);
em.flush();
album.setShelf(parentShelf);
} catch (Exception e) {
parentShelf.addAlbum(album);
throw new PhotoAlbumException(e.getMessage());
}
}
/**
* Synchronize state of album entity with database
*
* @param album - album to Synchronize
* @throws PhotoAlbumException
*/
public void editAlbum(Album album) throws PhotoAlbumException {
try {
em.merge(album);
em.flush();
} catch (Exception e) {
throw new PhotoAlbumException(e.getMessage());
}
}
/**
* Refresh state of given album
*
* @param album - album to Synchronize
*/
public Album resetAlbum(Album album) {
Album a = em.merge(album);
em.refresh(a);
return a;
}
}