/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, 2012, Red Hat Inc. 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 Inc.
 *
 * 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.hql.internal.ast.exec;

import org.hibernate.HibernateException;
import org.hibernate.action.internal.BulkOperationCleanupAction;
import org.hibernate.engine.spi.QueryParameters;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.event.spi.EventSource;
import org.hibernate.hql.internal.ast.HqlSqlWalker;
import org.hibernate.hql.spi.MultiTableBulkIdStrategy;

Implementation of MultiTableDeleteExecutor.
Author:
Steve Ebersole/**
 * Implementation of MultiTableDeleteExecutor.
 *
 * @author Steve Ebersole
 */
public class MultiTableDeleteExecutor implements StatementExecutor {
	private final MultiTableBulkIdStrategy.DeleteHandler deleteHandler;

	public MultiTableDeleteExecutor(HqlSqlWalker walker) {
		final MultiTableBulkIdStrategy strategy = walker.getSessionFactoryHelper().getFactory().getSettings()
				.getMultiTableBulkIdStrategy();
		this.deleteHandler = strategy.buildDeleteHandler( walker.getSessionFactoryHelper().getFactory(), walker );
	}

	public String[] getSqlStatements() {
		return deleteHandler.getSqlStatements();
	}

	public int execute(QueryParameters parameters, SessionImplementor session) throws HibernateException {
		BulkOperationCleanupAction action = new BulkOperationCleanupAction( session, deleteHandler.getTargetedQueryable() );
		if ( session.isEventSource() ) {
			( (EventSource) session ).getActionQueue().addAction( action );
		}
		else {
			action.getAfterTransactionCompletionProcess().doAfterTransactionCompletion( true, session );
		}

		return deleteHandler.execute( session, parameters );
	}
}