/**
* EasyBeans
* Copyright (C) 2007 Bull S.A.S.
* Contact: easybeans@ow2.org
*
* This library 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 any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: StatelessBean.java 5369 2010-02-24 14:58:19Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.easybeans.examples.ear;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
/**
* Defines a stateless bean with a local interface. This beans provides methods
* for accessing the two entities, Book and Author.<br>
* By default, an interface is considered as a local interface if there is no
* @Remote annotation.
* @author Florent Benoit
*/
@Stateless
public class StatelessBean implements StatelessLocal {
/**
* Entity manager utilise par ce bean.
*/
@PersistenceContext
private EntityManager entityManager = null;
/**
* Create authors and their books.
*/
public void init() {
// Books of balzac
Author balzac = new Author("Honore de Balzac");
Book pereGloriot = new Book("Le Pere Goriot", balzac);
balzac.getBooks().add(pereGloriot);
Book lesChouans = new Book("Les Chouans", balzac);
balzac.getBooks().add(lesChouans);
// Store (only author as cascade attribute is set to all)
entityManager.persist(balzac);
// Add Hugo books
Author hugo = new Author("Victor Hugo");
hugo.addBook("Les Miserables");
hugo.addBook("Notre-Dame de Paris");
// Store
entityManager.persist(hugo);
}
/**
* @return list of authors.
*/
@SuppressWarnings("unchecked")
public List<Author> listOfAuthors() {
Query auteurs = entityManager.createNamedQuery("allAuthors");
return auteurs.getResultList();
}
/**
* @return ist of books.
*/
@SuppressWarnings("unchecked")
public List<Book> listOfBooks() {
return entityManager.createNamedQuery("allBooks").getResultList();
}
}