com.liferay.portal.kernel.upgrade.dao.orm.UpgradeOptimizedPreparedStatementHandler Maven / Gradle / Ivy

/**
 * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
 *
 * This library 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 library 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.
 */

package com.liferay.portal.kernel.upgrade.dao.orm;

import com.liferay.portal.kernel.util.ProxyUtil;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @author Minhchau Dang
 */
public class UpgradeOptimizedPreparedStatementHandler
	implements InvocationHandler {

	public UpgradeOptimizedPreparedStatementHandler(
		PreparedStatement preparedStatement) {

		_preparedStatement = preparedStatement;
	}

	@Override
	public Object invoke(Object proxy, Method method, Object[] arguments)
		throws Throwable {

		try {
			String methodName = method.getName();

			if (methodName.equals("executeQuery")) {
				return executeQuery();
			}

			return method.invoke(_preparedStatement, arguments);
		}
		catch (InvocationTargetException ite) {
			throw ite.getTargetException();
		}
	}

	protected ResultSet executeQuery() throws SQLException {
		Thread currentThread = Thread.currentThread();

		ClassLoader classLoader = currentThread.getContextClassLoader();

		ResultSet resultSet = _preparedStatement.executeQuery();

		return (ResultSet)ProxyUtil.newProxyInstance(
			classLoader, new Class[] {ResultSet.class},
			new UpgradeOptimizedResultSetHandler(resultSet));
	}

	private PreparedStatement _preparedStatement;

}