source: Ballon/out/artifacts/geisa_artifact/WEB-INF/lib/mysql-connector-java-5.1.21/src/com/mysql/jdbc/jdbc2/optional/JDBC4MysqlPooledConnection.java

/*
 Copyright (c) 2007, 2010, 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.jdbc2.optional;

import java.sql.SQLException;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.sql.StatementEvent;
import javax.sql.StatementEventListener;


/**
 * This class is used to wrap and return a physical connection within a logical
 * handle. It also registers and notifies ConnectionEventListeners of any
 * ConnectionEvents
 * 
 * @see javax.sql.PooledConnection
 * @see org.gjt.mm.mysql.jdbc2.optional.LogicalHandle
 * @author Todd Wolff <todd.wolff_at_prodigy.net>
 */
public class JDBC4MysqlPooledConnection extends MysqlPooledConnection {

        private Map<StatementEventListener, StatementEventListener> statementEventListeners;

        public JDBC4MysqlPooledConnection(com.mysql.jdbc.Connection connection) {
                super(connection);
                
                this.statementEventListeners = new HashMap<StatementEventListener, StatementEventListener>();
        }
        
        public synchronized void close() throws SQLException {
                super.close();
                
                if (this.statementEventListeners != null) {
                        this.statementEventListeners.clear();
                        
                        this.statementEventListeners = null;
                }
        }
        
        
        /**
         * Registers a <code>StatementEventListener</code> with this <code>PooledConnection</code> object.  Components that 
         * wish to be notified when  <code>PreparedStatement</code>s created by the
     * connection are closed or are detected to be invalid may use this method 
     * to register a <code>StatementEventListener</code> with this <code>PooledConnection</code> object.
         * <p>
         * @param listener      an component which implements the <code>StatementEventListener</code> 
         *                                      interface that is to be registered with this <code>PooledConnection</code> object
         * <p>
         * @since 1.6
         */
        public void addStatementEventListener(StatementEventListener listener) {
                synchronized (this.statementEventListeners) {
                        this.statementEventListeners.put(listener, listener);
                }
        }
        
        /**
         * Removes the specified <code>StatementEventListener</code> from the list of 
         * components that will be notified when the driver detects that a 
         * <code>PreparedStatement</code> has been closed or is invalid.
         * <p> 
         * @param listener      the component which implements the
         *                                      <code>StatementEventListener</code> interface that was previously 
         *                                      registered with this <code>PooledConnection</code> object
         * <p>
         * @since 1.6
         */
        public void removeStatementEventListener(StatementEventListener listener) {
                synchronized (this.statementEventListeners) {
                        this.statementEventListeners.remove(listener);
                }
        }
        
        void fireStatementEvent(StatementEvent event) throws SQLException {
                synchronized (this.statementEventListeners) {
                        for (StatementEventListener listener : this.statementEventListeners.keySet()) {
                                listener.statementClosed(event);
                        }
                }
        }
}