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/*
 * Copyright (C) 2008 Search Solution Corporation. All rights reserved by Search Solution. 
 *
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met: 
 *
 * - Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer. 
 *
 * - Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution. 
 *
 * - Neither the name of the  nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software without 
 *   specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE. 
 *
 */

package cubrid.jdbc.driver;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Vector;

import javax.sql.ConnectionEvent;
import javax.sql.ConnectionEventListener;
import javax.sql.PooledConnection;
import javax.sql.StatementEventListener;

import cubrid.jdbc.jci.UConnection;

public class CUBRIDPooledConnection implements PooledConnection {
	protected UConnection u_con;
	protected boolean isClosed;
	protected CUBRIDConnection storedConnection;
	protected CUBRIDConnection cubConnection;
	private Vector eventListeners;

	protected CUBRIDPooledConnection() {
		initConnection();
	}

	protected CUBRIDPooledConnection(UConnection uCon) {
		initConnection();
		u_con = uCon;
	}

	protected CUBRIDPooledConnection(CUBRIDConnection cCon) {
		initConnection();
		storedConnection = cCon;

	}

	private void initConnection() {
		cubConnection = null;
		storedConnection = null;
		eventListeners = new Vector();
		isClosed = false;
		u_con = null;
	}

	/*
	 * javax.sql.PooledConnection interface
	 */

	synchronized public Connection getConnection() throws SQLException {
		if (isClosed) {
			throw new CUBRIDException(
					CUBRIDJDBCErrorCode.pooled_connection_closed);
		}

		if (cubConnection != null) {
			cubConnection.closeConnection();
		}

		if (u_con == null && storedConnection != null) {
			u_con = storedConnection.getUConnection();
		}

		if (u_con.check_cas() == false) {
			u_con.reset_connection();
		}

		cubConnection = new CUBRIDConnectionWrapperPooling(u_con, null,
				null, this);
		return cubConnection;
	}

	synchronized public void close() throws SQLException {
		if (isClosed) {
			return;
		}
		isClosed = true;
		if (cubConnection != null) {
			cubConnection.closeConnection();
		}
		if (storedConnection != null) {
			storedConnection.closeConnection();
		}
		if (u_con != null) {
			u_con.close();
		}
		eventListeners.clear();
	}

	synchronized public void addConnectionEventListener(
			ConnectionEventListener listener) {
		if (isClosed) {
			return;
		}

		eventListeners.addElement(listener);
	}

	synchronized public void removeConnectionEventListener(
			ConnectionEventListener listener) {
		if (isClosed) {
			return;
		}

		eventListeners.removeElement(listener);
	}

	synchronized void notifyConnectionClosed() {
		cubConnection = null;
		ConnectionEvent e = new ConnectionEvent(this);

		for (int i = 0; i < eventListeners.size(); i++) {
			eventListeners.elementAt(i).connectionClosed(e);
		}
	}

	synchronized void notifyConnectionErrorOccurred(SQLException ex) {
		cubConnection = null;
		ConnectionEvent e = new ConnectionEvent(this, ex);

		for (int i = 0; i < eventListeners.size(); i++) {
			eventListeners.elementAt(i).connectionErrorOccurred(e);
		}
	}

	/* JDK 1.6 */
	public void addStatementEventListener(StatementEventListener listener) {
		throw new java.lang.UnsupportedOperationException();
	}

	/* JDK 1.6 */
	public void removeStatementEventListener(StatementEventListener listener) {
		throw new java.lang.UnsupportedOperationException();
	}

}




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