Databinder.java

/*
 * Databinder: a simple bridge from Wicket to Hibernate
 * Copyright (C) 2006  Nathan Hamblen nathan@technically.us
 *
 * 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 (at your option) 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

package net.databinder.jpa.hib;



import javax.persistence.EntityManager;

import net.databinder.jpa.JPAApplication;

import org.apache.wicket.WicketRuntimeException;
import org.hibernate.Session;
import org.hibernate.ejb.HibernateEntityManager;

/**
 * Provides access to application-bound Hibernate session factories and current sessions.
 * This class will work with a
 * <a href="http://www.hibernate.org/hib_docs/v3/api/org/hibernate/context/ManagedSessionContext.html">ManagedSessionContext</a>
 * and DataRequestCycle listener when present, but neither is required so long as a
 * "current" session is available from the session factory supplied by the application.
 * @see JPAApplication
 * @author rhansen@kindleit.net
 */
public class Databinder {

  public static HibernateEntityManager getEntityManager(final Object factoryKey) {
    final EntityManager em = net.databinder.jpa.Databinder.getEntityManager(factoryKey.toString());

    if (em instanceof HibernateEntityManager) {
      return (HibernateEntityManager) em;
    }
    throw new WicketRuntimeException("You cannot use " + Databinder.class.getCanonicalName() + " without a hibernate entity manager");
  }

  public static Session getHibernateSession(final Object factoryKey) {
    return getEntityManager(factoryKey.toString()).getSession();
  }

}