/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.tool.hbm2ddl;

import java.sql.Connection;
import java.sql.SQLException;

import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
import org.hibernate.engine.jdbc.spi.SqlExceptionHelper;

A ConnectionHelper implementation based on a provided ConnectionProvider. Essentially, ensures that the connection gets cleaned up, but that the provider itself remains usable since it was externally provided to us. 
Author:
Steve Ebersole
Deprecated:
Everything in this package has been replaced with SchemaManagementTool and friends./**
 * A {@link ConnectionHelper} implementation based on a provided
 * {@link ConnectionProvider}.  Essentially, ensures that the connection
 * gets cleaned up, but that the provider itself remains usable since it
 * was externally provided to us.
 *
 * @author Steve Ebersole
 *
 * @deprecated Everything in this package has been replaced with
 * {@link org.hibernate.tool.schema.spi.SchemaManagementTool} and friends.
 */
@Deprecated
class SuppliedConnectionProviderConnectionHelper implements ConnectionHelper {
	private ConnectionProvider provider;
	private Connection connection;
	private boolean toggleAutoCommit;
	private final SqlExceptionHelper sqlExceptionHelper;

	public SuppliedConnectionProviderConnectionHelper(ConnectionProvider provider, SqlExceptionHelper sqlExceptionHelper)  {
		this.provider = provider;
		this.sqlExceptionHelper = sqlExceptionHelper;
	}

	public void prepare(boolean needsAutoCommit) throws SQLException {
		connection = provider.getConnection();
		toggleAutoCommit = needsAutoCommit && !connection.getAutoCommit();
		if ( toggleAutoCommit ) {
			try {
				connection.commit();
			}
			catch( Throwable ignore ) {
				// might happen with a managed connection
			}
			connection.setAutoCommit( true );
		}
	}

	public Connection getConnection() throws SQLException {
		return connection;
	}

	public void release() throws SQLException {
		// we only release the connection
		if ( connection != null ) {
			sqlExceptionHelper.logAndClearWarnings( connection );
			if ( toggleAutoCommit ) {
				connection.setAutoCommit( false );
			}
			provider.closeConnection( connection );
			connection = null;
		}
	}
}