/*
 * Copyright 2004-2007 IDCA. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 * 
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and
 *        the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
 *        and the following disclaimer in the documentation and/or other materials provided with the
 *        distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY IDCA AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IDCA OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * The views and conclusions contained in the software and documentation are those of the authors and
 * should not be interpreted as representing official policies, either expressed or implied, of IDCA.
 */

package com.idcanet.vasc.backends.jpa;

import org.hibernate.Session;

import com.idcanet.vasc.core.AbstractVascBackend;
import com.idcanet.vasc.core.VascException;

/**
 * 
 * @author Willem Cazander
 * @version 1.0 Mar 21, 2007
 */
abstract public class AbstractHibernateVascBackend extends AbstractVascBackend  {

	/**
	 * Provides a hibernate session which is closed !! when transaction is compleeted.
	 * @return
	 */
	abstract Session getHibernateSession();
	
	public void persist(Object object) throws VascException {
		Session s  = getHibernateSession();
		try {
			s.getTransaction().begin();
			s.persist(object);
			s.getTransaction().commit();
		} finally {
			if (s!=null && s.isOpen()) {
				if (s.getTransaction().isActive()) {
					s.getTransaction().rollback();
				}
				//s.close();
			}
		}
	}

	public Object merge(Object object) throws VascException {
		Session s  = getHibernateSession();
		try {
			s.getTransaction().begin();
			Object result = s.merge(object);
			s.getTransaction().commit();
			return result;
		} finally {
			if (s!=null && s.isOpen()) {
				if (s.getTransaction().isActive()) {
					s.getTransaction().rollback();
				}
				//s.close();
			}
		}
	}
	
	public void delete(Object object) throws VascException {
		Session s  = getHibernateSession();
		try {
			s.getTransaction().begin();
			Object newObject = s.merge(object);
			s.delete(newObject);
			s.getTransaction().commit();
		} finally {
			if (s!=null && s.isOpen()) {
				if (s.getTransaction().isActive()) {
					s.getTransaction().rollback();
				}
				//s.close();
			}
		}
	}
}