/* Copyright (C) 2002-2004 MySQL AB This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation.  There are special exceptions to the terms and conditions of the GPL  as it is applied to this software. View the full text of the  exception exception in file EXCEPTIONS-CONNECTOR-J in the directory of this  software distribution. 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */package com.mysql.jdbc.jdbc2.optional;import java.sql.Connection;import java.sql.SQLException;import java.sql.Savepoint;import java.sql.Statement;/** * This class serves as a wrapper for the org.gjt.mm.mysql.jdbc2.Connection * class.   It is returned to the application server which may wrap it again * and then return it to the application client in response to * dataSource.getConnection(). * * <p> * All method invocations are forwarded to org.gjt.mm.mysql.jdbc2.Connection * unless the close method was previously called, in which case a sqlException * is  thrown.  The close method performs a 'logical close' on the connection. * </p> * * <p> * All sqlExceptions thrown by the physical connection are intercepted and sent * to  connectionEvent listeners before being thrown to client. * </p> * * @author Todd Wolff todd.wolff_at_prodigy.net * * @see org.gjt.mm.mysql.jdbc2.Connection * @see org.gjt.mm.mysql.jdbc2.optional.MysqlPooledConnection */class ConnectionWrapper extends WrapperBase implements Connection {    private Connection mc = null;    private MysqlPooledConnection mpc = null;    private String invalidHandleStr = "Logical handle no longer valid";    private boolean closed;    /**     * Construct a new LogicalHandle and set instance variables     *     * @param mysqlPooledConnection reference to object that instantiated this     *        object     * @param mysqlConnection physical connection to db     *     * @throws SQLException if an error occurs.     */    public ConnectionWrapper(MysqlPooledConnection mysqlPooledConnection,        Connection mysqlConnection) throws SQLException {        this.mpc = mysqlPooledConnection;        this.mc = mysqlConnection;        this.closed = false;        this.pooledConnection = this.mpc;    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#setAutoCommit     */    public void setAutoCommit(boolean autoCommit) throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                this.mc.setAutoCommit(autoCommit);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#getAutoCommit()     */    public boolean getAutoCommit() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getAutoCommit();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return false; // we don't reach this code, compiler can't tell    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#setCatalog()     */    public void setCatalog(String catalog) throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                this.mc.setCatalog(catalog);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @return the current catalog     *     * @throws SQLException if an error occurs     */    public String getCatalog() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getCatalog();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return null; // we don't reach this code, compiler can't tell    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#isClosed()     */    public boolean isClosed() throws SQLException {        return (closed || this.mc.isClosed());    }    /**     * @see Connection#setHoldability(int)     */    public void setHoldability(int arg0) throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                this.mc.setHoldability(arg0);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }    }    /**     * @see Connection#getHoldability()     */    public int getHoldability() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getHoldability();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return Statement.CLOSE_CURRENT_RESULT; // we don't reach this code, compiler can't tell    }    /**     * Allows clients to determine how long this connection has been idle.     *     * @return how long the connection has been idle.     */    public long getIdleFor() {        return ((com.mysql.jdbc.Connection) mc).getIdleFor();    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @return a metadata instance     *     * @throws SQLException if an error occurs     */    public java.sql.DatabaseMetaData getMetaData() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getMetaData();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return null; // we don't reach this code, compiler can't tell    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#setReadOnly()     */    public void setReadOnly(boolean readOnly) throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                this.mc.setReadOnly(readOnly);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#isReadOnly()     */    public boolean isReadOnly() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.isReadOnly();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return false; // we don't reach this code, compiler can't tell    }    /**     * @see Connection#setSavepoint()     */    public java.sql.Savepoint setSavepoint() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.setSavepoint();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return null; // we don't reach this code, compiler can't tell    }    /**     * @see Connection#setSavepoint(String)     */    public java.sql.Savepoint setSavepoint(String arg0)        throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.setSavepoint(arg0);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return null; // we don't reach this code, compiler can't tell    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#setTransactionIsolation()     */    public void setTransactionIsolation(int level) throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                this.mc.setTransactionIsolation(level);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#getTransactionIsolation()     */    public int getTransactionIsolation() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getTransactionIsolation();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return TRANSACTION_REPEATABLE_READ; // we don't reach this code, compiler can't tell    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#setTypeMap()     */    public void setTypeMap(java.util.Map map) throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                this.mc.setTypeMap(map);            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#getTypeMap()     */    public java.util.Map getTypeMap() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getTypeMap();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);            }        }        return null; // we don't reach this code, compiler can't tell    }    /**     * Passes call to method on physical connection instance.  Notifies     * listeners of any caught exceptions before re-throwing to client.     *     * @see java.sql.Connection#getWarnings     */    public java.sql.SQLWarning getWarnings() throws SQLException {        if (closed) {            throw new SQLException(invalidHandleStr);        } else {            try {                return this.mc.getWarnings();            } catch (SQLException sqlException) {                checkAndFireConnectionError(sqlException);