NoSubInterceptorWrapper.java

/*
  Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  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 General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA

 */

package com.mysql.jdbc;

import java.sql.SQLException;
import java.util.Properties;

/**
 * Wraps statement interceptors during driver startup so that they don't produce
 * different result sets than we expect.
 */
public class NoSubInterceptorWrapper implements StatementInterceptorV2 {

	private final StatementInterceptorV2 underlyingInterceptor;
	
	public NoSubInterceptorWrapper(StatementInterceptorV2 underlyingInterceptor) {
		if (underlyingInterceptor == null) {
			throw new RuntimeException("Interceptor to be wrapped can not be NULL");
		}
		
		this.underlyingInterceptor = underlyingInterceptor;
	}
	
	public void destroy() {
		underlyingInterceptor.destroy();
	}

	public boolean executeTopLevelOnly() {
		return underlyingInterceptor.executeTopLevelOnly();
	}

	public void init(Connection conn, Properties props) throws SQLException {
		underlyingInterceptor.init(conn, props);
	}

	public ResultSetInternalMethods postProcess(String sql,
			Statement interceptedStatement,
			ResultSetInternalMethods originalResultSet, Connection connection,
			int warningCount, boolean noIndexUsed, boolean noGoodIndexUsed,
			SQLException statementException) throws SQLException {
		underlyingInterceptor.postProcess(sql, interceptedStatement, originalResultSet, 
				connection, warningCount, noIndexUsed, noGoodIndexUsed, statementException);
		
		return null; // don't allow result set substitution
	}

	public ResultSetInternalMethods preProcess(String sql,
			Statement interceptedStatement, Connection connection)
			throws SQLException {
		underlyingInterceptor.preProcess(sql, interceptedStatement, connection);
		
		return null; // don't allow result set substitution
	}
	
	public StatementInterceptorV2 getUnderlyingInterceptor() {
		return underlyingInterceptor;
	}
}