/**
* EasyBeans
* Copyright (C) 2006 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: EntityManagerHelper.java 5369 2010-02-24 14:58:19Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.easybeans.injection;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContextType;
import org.ow2.easybeans.api.Factory;
import org.ow2.easybeans.api.container.EZBEJBContext;
import org.ow2.easybeans.persistence.api.EZBPersistenceUnitManager;
import org.ow2.util.log.Log;
import org.ow2.util.log.LogFactory;
/**
* Helper class for injecting EntityManager instance in the bean.
* @author Florent Benoit
*/
public final class EntityManagerHelper {
/**
* Logger.
*/
private static Log logger = LogFactory.getLog(EntityManagerHelper.class);
/**
* Utility class, no public constructor.
*/
private EntityManagerHelper() {
}
/**
* Gets an entity manager for the given session Context.
* @param ejbContext on which we should provide an entity manager.
* @param unitName name of the persistence unit.
* @param type the persistence context type.
* @return instance of an entity manager which will be used by the
* bean/interceptor.
*/
public static EntityManager getEntityManager(final EZBEJBContext ejbContext, final String unitName,
final PersistenceContextType type) {
// get bean's factory
Factory factory = ejbContext.getFactory();
EZBPersistenceUnitManager persistenceUnitManager = factory.getContainer().getPersistenceUnitManager();
if (persistenceUnitManager != null) {
return persistenceUnitManager.getEntityManager(unitName, type);
}
logger.warn("Requested an EntityManager object but there is no persistenceUnitManager associated"
+ " to this bean/interceptor : {0}", factory);
return null;
}
/**
* Gets an entity manager factory for the given session Context.
* @param ejbContext on which we should provide an entity manager
* factory.
* @param unitName name of the persistence unit.
* @return instance of an entity manager factory which will be used by the
* bean/interceptor.
*/
public static EntityManagerFactory getEntityManagerFactory(final EZBEJBContext ejbContext,
final String unitName) {
// get bean's factory
Factory factory = ejbContext.getFactory();
EZBPersistenceUnitManager persistenceUnitManager = factory.getContainer().getPersistenceUnitManager();
if (persistenceUnitManager != null) {
return persistenceUnitManager.getEntityManagerFactory(unitName);
}
logger.warn("Requested an EntityManagerFactory but there is no persistenceUnitManager associated"
+ " to this bean/interceptor : {0}", factory);
return null;
}
}