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 Copyright (c) 2002, 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

  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.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLClientInfoException;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

 * An implementation of JDBC4ClientInfoProvider that exposes
 * the client info as a comment prepended to all statements issued
 * by the driver.
 * Client information is <i>never</i> read from the server with this
 * implementation, it is always cached locally.
 * @version $Id: $

00047 public class JDBC4CommentClientInfoProvider implements JDBC4ClientInfoProvider {
      private Properties clientInfo;
00050       public synchronized void initialize(java.sql.Connection conn,
                  Properties configurationProps) throws SQLException {
            this.clientInfo = new Properties();

00055       public synchronized void destroy() throws SQLException {
            this.clientInfo = null;

00059       public synchronized Properties getClientInfo(java.sql.Connection conn)
                  throws SQLException {
            return this.clientInfo;

00064       public synchronized String getClientInfo(java.sql.Connection conn,
                  String name) throws SQLException {
            return this.clientInfo.getProperty(name);

00069       public synchronized void setClientInfo(java.sql.Connection conn,
                  Properties properties) throws SQLClientInfoException {
            this.clientInfo = new Properties();
            Enumeration propNames = properties.propertyNames();
            while (propNames.hasMoreElements()) {
                  String name = (String)propNames.nextElement();
                  this.clientInfo.put(name, properties.getProperty(name));

00084       public synchronized void setClientInfo(java.sql.Connection conn,
                  String name, String value) throws SQLClientInfoException {
            this.clientInfo.setProperty(name, value);
      private synchronized void setComment(java.sql.Connection conn) {
            StringBuffer commentBuf = new StringBuffer();
            Iterator elements = this.clientInfo.entrySet().iterator();
            while (elements.hasNext()) {
                  if (commentBuf.length() > 0) {
                        commentBuf.append(", ");
                  Map.Entry entry = (Map.Entry)elements.next();
                  commentBuf.append("" + entry.getKey());
                  commentBuf.append("" + entry.getValue());

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