/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2009, Red Hat, Inc. and/or it's affiliates, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.hibernate.test.cache.infinispan.tm;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import org.hibernate.HibernateException;
import org.hibernate.service.UnknownUnwrapTypeException;
import org.hibernate.service.jdbc.connections.spi.ConnectionProvider;
import org.hibernate.service.spi.Stoppable;

import org.hibernate.testing.env.ConnectionProviderBuilder;

/**
 * XaConnectionProvider.
 *
 * @author Galder Zamarreño
 * @since 3.5
 */
public class XaConnectionProvider implements ConnectionProvider {
	private static ConnectionProvider actualConnectionProvider = ConnectionProviderBuilder.buildConnectionProvider();
	private boolean isTransactional;

	public static ConnectionProvider getActualConnectionProvider() {
		return actualConnectionProvider;
	}

	@Override
	public boolean isUnwrappableAs(Class unwrapType) {
		return XaConnectionProvider.class.isAssignableFrom( unwrapType ) ||
				ConnectionProvider.class.equals( unwrapType ) ||
				actualConnectionProvider.getClass().isAssignableFrom( unwrapType );
	}

	@Override
	@SuppressWarnings( {"unchecked"})
	public <T> T unwrap(Class<T> unwrapType) {
		if ( XaConnectionProvider.class.isAssignableFrom( unwrapType ) ) {
			return (T) this;
		}
		else if ( ConnectionProvider.class.isAssignableFrom( unwrapType ) ||
				actualConnectionProvider.getClass().isAssignableFrom( unwrapType ) ) {
			return (T) getActualConnectionProvider();
		}
		else {
			throw new UnknownUnwrapTypeException( unwrapType );
		}
	}

	public void configure(Properties props) throws HibernateException {
	}

	public Connection getConnection() throws SQLException {
		XaTransactionImpl currentTransaction = XaTransactionManagerImpl.getInstance().getCurrentTransaction();
		if ( currentTransaction == null ) {
			isTransactional = false;
			return actualConnectionProvider.getConnection();
		}
		else {
			isTransactional = true;
			Connection connection = currentTransaction.getEnlistedConnection();
			if ( connection == null ) {
				connection = actualConnectionProvider.getConnection();
				currentTransaction.enlistConnection( connection );
			}
			return connection;
		}
	}

	public void closeConnection(Connection conn) throws SQLException {
		if ( !isTransactional ) {
			conn.close();
		}
	}

	public void close() throws HibernateException {
		if ( actualConnectionProvider instanceof Stoppable ) {
			((Stoppable) actualConnectionProvider).stop();
		}
	}

	public boolean supportsAggressiveRelease() {
		return true;
	}
}