/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.event.def;

import org.hibernate.HibernateException;
import org.hibernate.event.EventSource;
import org.hibernate.event.FlushEvent;
import org.hibernate.event.FlushEventListener;

/**
 * Defines the default flush event listeners used by hibernate for 
 * flushing session state in response to generated flush events.
 *
 * @author Steve Ebersole
 */
public class DefaultFlushEventListener extends AbstractFlushingEventListener implements FlushEventListener {

	/** Handle the given flush event.
	 *
	 * @param event The flush event to be handled.
	 * @throws HibernateException
	 */
	public void onFlush(FlushEvent event) throws HibernateException {
		final EventSource source = event.getSession();
		if ( source.getPersistenceContext().getEntityEntries().size() > 0 ||
				source.getPersistenceContext().getCollectionEntries().size() > 0 ) {

			flushEverythingToExecutions(event);
			performExecutions(source);
			postFlush(source);
		
			if ( source.getFactory().getStatistics().isStatisticsEnabled() ) {
				source.getFactory().getStatisticsImplementor().flush();
			}

		}
	}
}
