/*
  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.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.SQLException;
import java.util.Properties;

public class ReflectiveStatementInterceptorAdapter implements
		StatementInterceptorV2 {

	private final StatementInterceptor toProxy;
	
	final Method v2PostProcessMethod;

	public ReflectiveStatementInterceptorAdapter(StatementInterceptor toProxy) {
		this.toProxy = toProxy;
		this.v2PostProcessMethod = getV2PostProcessMethod(toProxy.getClass());
	}
	
	public void destroy() {
		toProxy.destroy();
	}

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

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

	public ResultSetInternalMethods postProcess(String sql,
			Statement interceptedStatement,
			ResultSetInternalMethods originalResultSet, Connection connection,
			int warningCount, boolean noIndexUsed, boolean noGoodIndexUsed, 
			SQLException statementException) throws SQLException {
		// TODO Auto-generated method stub
		try {
			return (ResultSetInternalMethods) v2PostProcessMethod.invoke(toProxy, new Object[] {sql,
				interceptedStatement,
				originalResultSet, connection,
				Integer.valueOf(warningCount), noIndexUsed ? Boolean.TRUE : Boolean.FALSE, noGoodIndexUsed ? Boolean.TRUE: Boolean.FALSE,
						statementException});
		} catch (IllegalArgumentException e) {
			SQLException sqlEx = new SQLException("Unable to reflectively invoke interceptor");
			sqlEx.initCause(e);
			
			throw sqlEx;
		} catch (IllegalAccessException e) {
			SQLException sqlEx = new SQLException("Unable to reflectively invoke interceptor");
			sqlEx.initCause(e);
			
			throw sqlEx;
		} catch (InvocationTargetException e) {
			SQLException sqlEx = new SQLException("Unable to reflectively invoke interceptor");
			sqlEx.initCause(e);
			
			throw sqlEx;
		}
	}

	public ResultSetInternalMethods preProcess(String sql,
			Statement interceptedStatement, Connection connection)
			throws SQLException {
		return toProxy.preProcess(sql, interceptedStatement, connection);
	}

	public static final Method getV2PostProcessMethod(Class<?> toProxyClass) {
		try {
			Method postProcessMethod = toProxyClass.getMethod("postProcess", new Class[] {
					String.class, Statement.class, ResultSetInternalMethods.class, Connection.class, Integer.TYPE, 
					Boolean.TYPE, Boolean.TYPE, SQLException.class});
			
			return postProcessMethod;
		} catch (SecurityException e) {
			return null;
		} catch (NoSuchMethodException e) {
			return null;
		}
	}
}