openjpa-lib/src/main/java/org/apache/openjpa/lib/jdbc/DelegatingConnection.java - openjpa - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */
 package org.apache.openjpa.lib.jdbc;

 import java.sql.Array;
 import java.sql.Blob;
 import java.sql.CallableStatement;
 import java.sql.Clob;
 import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.NClob;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLClientInfoException;
 import java.sql.SQLException;
 import java.sql.SQLWarning;
 import java.sql.SQLXML;
 import java.sql.Savepoint;
 import java.sql.Statement;
 import java.sql.Struct;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.Executor;

 import org.apache.openjpa.lib.util.Closeable;


 /**
  * Wrapper around an existing connection. Subclasses can override the
  * methods whose behavior they mean to change. The <code>equals</code> and
  * <code>hashCode</code> methods pass through to the base underlying data
  * store connection.
  *
  * @author Abe White
  */
 public class DelegatingConnection implements Connection, Closeable {

     private final Connection _conn;
     private final DelegatingConnection _del;

     public DelegatingConnection(Connection conn) {
         _conn = conn;
         if (conn instanceof DelegatingConnection)
             _del = (DelegatingConnection) _conn;
         else
             _del = null;
     }

     /**
      * Return the wrapped connection.
      */
     public Connection getDelegate() {
         return _conn;
     }

     /**
      * Return the base underlying data store connection.
      */
     public Connection getInnermostDelegate() {
         return (_del == null) ? _conn : _del.getInnermostDelegate();
     }

     public int hashCode() {
         return getInnermostDelegate().hashCode();
     }

     public boolean equals(Object other) {
         if (other == this)
             return true;
         if (other instanceof DelegatingConnection)
             other = ((DelegatingConnection) other).getInnermostDelegate();
         return getInnermostDelegate().equals(other);
     }

     public String toString() {
         StringBuffer buf = new StringBuffer("conn ").append(hashCode());
         appendInfo(buf);
         return buf.toString();
     }

     protected void appendInfo(StringBuffer buf) {
         if (_del != null)
             _del.appendInfo(buf);
     }

     public Statement createStatement() throws SQLException {
         return createStatement(true);
     }

     /**
      * Create a statement, with the option of not wrapping it in a
      * {@link DelegatingStatement}, which is the default.
      */
     protected Statement createStatement(boolean wrap) throws SQLException {
         Statement stmnt;
         if (_del != null)
             stmnt = _del.createStatement(false);
         else
             stmnt = _conn.createStatement();
         if (wrap)
             stmnt = new DelegatingStatement(stmnt, this);
         return stmnt;
     }

     public PreparedStatement prepareStatement(String str) throws SQLException {
         return prepareStatement(str, true);
     }

     /**
      * Prepare a statement, with the option of not wrapping it in a
      * {@link DelegatingPreparedStatement}, which is the default.
      */
     protected PreparedStatement prepareStatement(String str, boolean wrap)
         throws SQLException {
         PreparedStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareStatement(str, false);
         else
             stmnt = _conn.prepareStatement(str, ResultSet.TYPE_FORWARD_ONLY,
                 ResultSet.CONCUR_READ_ONLY);
         if (wrap)
             stmnt = new DelegatingPreparedStatement(stmnt, this);
         return stmnt;
     }

     public CallableStatement prepareCall(String str) throws SQLException {
         return prepareCall(str, true);
     }

     /**
      * Prepare a call, with the option of not wrapping it in a
      * {@link DelegatingCallableStatement}, which is the default.
      */
     protected CallableStatement prepareCall(String str, boolean wrap)
         throws SQLException {
         CallableStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareCall(str, false);
         else
             stmnt = _conn.prepareCall(str);
         if (wrap)
             stmnt = new DelegatingCallableStatement(stmnt, this);
         return stmnt;
     }

     public String nativeSQL(String str) throws SQLException {
         return _conn.nativeSQL(str);
     }

     public void setAutoCommit(boolean bool) throws SQLException {
         _conn.setAutoCommit(bool);
     }

     public boolean getAutoCommit() throws SQLException {
         return _conn.getAutoCommit();
     }

     public void commit() throws SQLException {
         _conn.commit();
     }

     public void rollback() throws SQLException {
         _conn.rollback();
     }

     public void close() throws SQLException {
         _conn.close();
     }

     public boolean isClosed() throws SQLException {
         return _conn.isClosed();
     }

     public DatabaseMetaData getMetaData() throws SQLException {
         return getMetaData(true);
     }

     /**
      * Return the metadata, with the option of not wrapping it in a
      * {@link DelegatingDatabaseMetaData}, which is the default.
      */
     protected DatabaseMetaData getMetaData(boolean wrap) throws SQLException {
         DatabaseMetaData meta;
         if (_del != null)
             meta = _del.getMetaData(false);
         else
             meta = _conn.getMetaData();
         if (wrap)
             meta = new DelegatingDatabaseMetaData(meta, this);
         return meta;
     }

     public void setReadOnly(boolean bool) throws SQLException {
         _conn.setReadOnly(bool);
     }

     public boolean isReadOnly() throws SQLException {
         return _conn.isReadOnly();
     }

     public void setCatalog(String str) throws SQLException {
         _conn.setCatalog(str);
     }

     public String getCatalog() throws SQLException {
         return _conn.getCatalog();
     }

     public void setTransactionIsolation(int i) throws SQLException {
         _conn.setTransactionIsolation(i);
     }

     public int getTransactionIsolation() throws SQLException {
         return _conn.getTransactionIsolation();
     }

     public SQLWarning getWarnings() throws SQLException {
         return _conn.getWarnings();
     }

     public void clearWarnings() throws SQLException {
         _conn.clearWarnings();
     }

     public Statement createStatement(int type, int concur) throws SQLException {
         return createStatement(type, concur, true);
     }

     /**
      * Create a statement, with the option of not wrapping it in a
      * {@link DelegatingStatement}, which is the default.
      */
     protected Statement createStatement(int type, int concur, boolean wrap)
         throws SQLException {
         Statement stmnt;
         if (_del != null)
             stmnt = _del.createStatement(type, concur, false);
         else
             stmnt = _conn.createStatement(type, concur);
         if (wrap)
             stmnt = new DelegatingStatement(stmnt, this);
         return stmnt;
     }

     public PreparedStatement prepareStatement(String str, int type, int concur)
         throws SQLException {
         return prepareStatement(str, type, concur, true);
     }

     /**
      * Prepare a statement, with the option of not wrapping it in a
      * {@link DelegatingPreparedStatement}, which is the default.
      */
     protected PreparedStatement prepareStatement(String str, int type,
         int concur, boolean wrap) throws SQLException {
         PreparedStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareStatement(str, type, concur, false);
         else
             stmnt = _conn.prepareStatement(str, type, concur);
         if (wrap)
             stmnt = new DelegatingPreparedStatement(stmnt, this);
         return stmnt;
     }

     public CallableStatement prepareCall(String str, int type, int concur)
         throws SQLException {
         return prepareCall(str, type, concur, true);
     }

     /**
      * Prepare a call, with the option of not wrapping it in a
      * {@link DelegatingCallableStatement}, which is the default.
      */
     protected CallableStatement prepareCall(String str, int type, int concur,
         boolean wrap) throws SQLException {
         CallableStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareCall(str, type, concur, false);
         else
             stmnt = _conn.prepareCall(str, type, concur);
         if (wrap)
             stmnt = new DelegatingCallableStatement(stmnt, this);
         return stmnt;
     }

     public Map<String, Class<?>> getTypeMap() throws SQLException {
         return _conn.getTypeMap();
     }

     public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
         _conn.setTypeMap(map);
     }

     // JDBC 3.0 methods follow.

     public void setHoldability(int holdability) throws SQLException {
         _conn.setHoldability(holdability);
     }

     public int getHoldability() throws SQLException {
         return _conn.getHoldability();
     }

     public Savepoint setSavepoint() throws SQLException {
         return _conn.setSavepoint();
     }

     public Savepoint setSavepoint(String savepoint) throws SQLException {
         return _conn.setSavepoint(savepoint);
     }

     public void rollback(Savepoint savepoint) throws SQLException {
         _conn.rollback(savepoint);
     }

     public void releaseSavepoint(Savepoint savepoint) throws SQLException {
         _conn.releaseSavepoint(savepoint);
     }

     public Statement createStatement(int resultSetType,
         int resultSetConcurrency, int resultSetHoldability)
         throws SQLException {
         return createStatement(resultSetType, resultSetConcurrency,
             resultSetHoldability, true);
     }

     protected Statement createStatement(int resultSetType,
         int resultSetConcurrency, int resultSetHoldability, boolean wrap)
         throws SQLException {
         Statement stmnt;
         if (_del != null)
             stmnt = _del.createStatement(resultSetType, resultSetConcurrency,
                 resultSetHoldability, false);
         else {
             stmnt = _conn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
         }
         if (wrap)
             stmnt = new DelegatingStatement(stmnt, this);
         return stmnt;
     }

     public PreparedStatement prepareStatement(String sql,
         int resultSetType, int resultSetConcurrency, int resultSetHoldability)
         throws SQLException {
         return prepareStatement(sql, resultSetType, resultSetConcurrency,
             resultSetHoldability, true);
     }

     protected PreparedStatement prepareStatement(String sql,
         int resultSetType, int resultSetConcurrency, int resultSetHoldability,
         boolean wrap) throws SQLException {
         PreparedStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareStatement(sql, resultSetType,
                 resultSetConcurrency, resultSetHoldability, false);
         else {
             stmnt = _conn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
         }
         if (wrap)
             stmnt = new DelegatingPreparedStatement(stmnt, this);
         return stmnt;
     }

     public CallableStatement prepareCall(String sql,
         int resultSetType, int resultSetConcurrency, int resultSetHoldability)
         throws SQLException {
         return prepareCall(sql, resultSetType, resultSetConcurrency,
             resultSetHoldability, true);
     }

     protected CallableStatement prepareCall(String sql, int resultSetType,
         int resultSetConcurrency, int resultSetHoldability, boolean wrap)
         throws SQLException {
         CallableStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareCall(sql, resultSetType,
                 resultSetConcurrency, resultSetHoldability, false);
         else {
             stmnt = _conn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
         }
         if (wrap)
             stmnt = new DelegatingCallableStatement(stmnt, this);
         return stmnt;
     }

     public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
         throws SQLException {
         return prepareStatement(sql, autoGeneratedKeys, true);
     }

     protected PreparedStatement prepareStatement(String sql,
         int autoGeneratedKeys, boolean wrap) throws SQLException {
         PreparedStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareStatement(sql, autoGeneratedKeys);
         else {
             stmnt = _conn.prepareStatement(sql, autoGeneratedKeys);
         }
         if (wrap)
             stmnt = new DelegatingPreparedStatement(stmnt, this);
         return stmnt;
     }

     public PreparedStatement prepareStatement(String sql, int[] columnIndexes)
         throws SQLException {
         return prepareStatement(sql, columnIndexes, true);
     }

     protected PreparedStatement prepareStatement(String sql,
         int[] columnIndexes, boolean wrap) throws SQLException {
         PreparedStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareStatement(sql, columnIndexes, wrap);
         else {
             stmnt = _conn.prepareStatement(sql, columnIndexes);
         }
         if (wrap)
             stmnt = new DelegatingPreparedStatement(stmnt, this);
         return stmnt;
     }

     public PreparedStatement prepareStatement(String sql, String[] columnNames)
         throws SQLException {
         return prepareStatement(sql, columnNames, true);
     }

     protected PreparedStatement prepareStatement(String sql,
         String[] columnNames, boolean wrap) throws SQLException {
         PreparedStatement stmnt;
         if (_del != null)
             stmnt = _del.prepareStatement(sql, columnNames, wrap);
         else {
             stmnt = _conn.prepareStatement(sql, columnNames);
         }
         if (wrap)
             stmnt = new DelegatingPreparedStatement(stmnt, this);
         return stmnt;
     }

     //  JDBC 4.0 methods follow.

     public boolean isWrapperFor(Class<?> iface) throws SQLException {
         return iface.isAssignableFrom(getDelegate().getClass());
     }

     /**
      * From java.sql.Wrapper javadoc:
      *
      * Returns an object that implements the given interface to allow access to
      * non-standard methods, or standard methods not exposed by the proxy. If
      * the receiver implements the interface then the result is the receiver
      * or a proxy for the receiver. If the receiver is a wrapper and the
      * wrapped object implements the interface then the result is the wrapped
      * object or a proxy for the wrapped object. Otherwise return the the
      * result of calling unwrap recursively on the wrapped object or a proxy
      * for that result. If the receiver is not a wrapper and does not implement
      * the interface, then an SQLException is thrown.
      *
      */
     @Override
     public <T> T unwrap(Class<T> iface) throws SQLException {
         if (isWrapperFor(iface)) {
             return (T) getDelegate();
         } else {
             return getDelegate().unwrap(iface);
         }
     }

     public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
         return _conn.createArrayOf(typeName, elements);
     }

     public Blob createBlob() throws SQLException {
         return _conn.createBlob();
     }

     public Clob createClob() throws SQLException {
         return _conn.createClob();
     }

     public NClob createNClob() throws SQLException {
         return _conn.createNClob();
     }

     public SQLXML createSQLXML() throws SQLException {
         return _conn.createSQLXML();
     }

     public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
         return _conn.createStruct(typeName, attributes);
     }

     public Properties getClientInfo() throws SQLException {
         return _conn.getClientInfo();
     }

     public String getClientInfo(String name) throws SQLException {
         return _conn.getClientInfo(name);
     }

     public boolean isValid(int timeout) throws SQLException {
         return _conn.isValid(timeout);
     }

     public void setClientInfo(Properties properties) throws SQLClientInfoException {
         _conn.setClientInfo(properties);
     }

     public void setClientInfo(String name, String value) throws SQLClientInfoException {
         _conn.setClientInfo(name, value);
     }

     // Java 7 methods follow

     public void abort(Executor executor) throws SQLException {
     	throw new UnsupportedOperationException();
     }

     public int getNetworkTimeout() throws SQLException{
     	throw new UnsupportedOperationException();
     }

     public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException{
     	throw new UnsupportedOperationException();
     }

     public String getSchema() throws SQLException {
     	throw new UnsupportedOperationException();
     }

     public void setSchema(String schema)throws SQLException {
     	throw new UnsupportedOperationException();
     }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/
	package org.apache.openjpa.lib.jdbc;

	import java.sql.Array;
	import java.sql.Blob;
	import java.sql.CallableStatement;
	import java.sql.Clob;
	import java.sql.Connection;
	import java.sql.DatabaseMetaData;
	import java.sql.NClob;
	import java.sql.PreparedStatement;
	import java.sql.ResultSet;
	import java.sql.SQLClientInfoException;
	import java.sql.SQLException;
	import java.sql.SQLWarning;
	import java.sql.SQLXML;
	import java.sql.Savepoint;
	import java.sql.Statement;
	import java.sql.Struct;
	import java.util.Map;
	import java.util.Properties;
	import java.util.concurrent.Executor;

	import org.apache.openjpa.lib.util.Closeable;


	/**
	* Wrapper around an existing connection. Subclasses can override the
	* methods whose behavior they mean to change. The <code>equals</code> and
	* <code>hashCode</code> methods pass through to the base underlying data
	* store connection.
	*
	* @author Abe White
	*/
	public class DelegatingConnection implements Connection, Closeable {

	private final Connection _conn;
	private final DelegatingConnection _del;

	public DelegatingConnection(Connection conn) {
	_conn = conn;
	if (conn instanceof DelegatingConnection)
	_del = (DelegatingConnection) _conn;
	else
	_del = null;
	}

	/**
	* Return the wrapped connection.
	*/
	public Connection getDelegate() {
	return _conn;
	}

	/**
	* Return the base underlying data store connection.
	*/
	public Connection getInnermostDelegate() {
	return (_del == null) ? _conn : _del.getInnermostDelegate();
	}

	public int hashCode() {
	return getInnermostDelegate().hashCode();
	}

	public boolean equals(Object other) {
	if (other == this)
	return true;
	if (other instanceof DelegatingConnection)
	other = ((DelegatingConnection) other).getInnermostDelegate();
	return getInnermostDelegate().equals(other);
	}

	public String toString() {
	StringBuffer buf = new StringBuffer("conn ").append(hashCode());
	appendInfo(buf);
	return buf.toString();
	}

	protected void appendInfo(StringBuffer buf) {
	if (_del != null)
	_del.appendInfo(buf);
	}

	public Statement createStatement() throws SQLException {
	return createStatement(true);
	}

	/**
	* Create a statement, with the option of not wrapping it in a
	* {@link DelegatingStatement}, which is the default.
	*/
	protected Statement createStatement(boolean wrap) throws SQLException {
	Statement stmnt;
	if (_del != null)
	stmnt = _del.createStatement(false);
	else
	stmnt = _conn.createStatement();
	if (wrap)
	stmnt = new DelegatingStatement(stmnt, this);
	return stmnt;
	}

	public PreparedStatement prepareStatement(String str) throws SQLException {
	return prepareStatement(str, true);
	}

	/**
	* Prepare a statement, with the option of not wrapping it in a
	* {@link DelegatingPreparedStatement}, which is the default.
	*/
	protected PreparedStatement prepareStatement(String str, boolean wrap)
	throws SQLException {
	PreparedStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareStatement(str, false);
	else
	stmnt = _conn.prepareStatement(str, ResultSet.TYPE_FORWARD_ONLY,
	ResultSet.CONCUR_READ_ONLY);
	if (wrap)
	stmnt = new DelegatingPreparedStatement(stmnt, this);
	return stmnt;
	}

	public CallableStatement prepareCall(String str) throws SQLException {
	return prepareCall(str, true);
	}

	/**
	* Prepare a call, with the option of not wrapping it in a
	* {@link DelegatingCallableStatement}, which is the default.
	*/
	protected CallableStatement prepareCall(String str, boolean wrap)
	throws SQLException {
	CallableStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareCall(str, false);
	else
	stmnt = _conn.prepareCall(str);
	if (wrap)
	stmnt = new DelegatingCallableStatement(stmnt, this);
	return stmnt;
	}

	public String nativeSQL(String str) throws SQLException {
	return _conn.nativeSQL(str);
	}

	public void setAutoCommit(boolean bool) throws SQLException {
	_conn.setAutoCommit(bool);
	}

	public boolean getAutoCommit() throws SQLException {
	return _conn.getAutoCommit();
	}

	public void commit() throws SQLException {
	_conn.commit();
	}

	public void rollback() throws SQLException {
	_conn.rollback();
	}

	public void close() throws SQLException {
	_conn.close();
	}

	public boolean isClosed() throws SQLException {
	return _conn.isClosed();
	}

	public DatabaseMetaData getMetaData() throws SQLException {
	return getMetaData(true);
	}

	/**
	* Return the metadata, with the option of not wrapping it in a
	* {@link DelegatingDatabaseMetaData}, which is the default.
	*/
	protected DatabaseMetaData getMetaData(boolean wrap) throws SQLException {
	DatabaseMetaData meta;
	if (_del != null)
	meta = _del.getMetaData(false);
	else
	meta = _conn.getMetaData();
	if (wrap)
	meta = new DelegatingDatabaseMetaData(meta, this);
	return meta;
	}

	public void setReadOnly(boolean bool) throws SQLException {
	_conn.setReadOnly(bool);
	}

	public boolean isReadOnly() throws SQLException {
	return _conn.isReadOnly();
	}

	public void setCatalog(String str) throws SQLException {
	_conn.setCatalog(str);
	}

	public String getCatalog() throws SQLException {
	return _conn.getCatalog();
	}

	public void setTransactionIsolation(int i) throws SQLException {
	_conn.setTransactionIsolation(i);
	}

	public int getTransactionIsolation() throws SQLException {
	return _conn.getTransactionIsolation();
	}

	public SQLWarning getWarnings() throws SQLException {
	return _conn.getWarnings();
	}

	public void clearWarnings() throws SQLException {
	_conn.clearWarnings();
	}

	public Statement createStatement(int type, int concur) throws SQLException {
	return createStatement(type, concur, true);
	}

	/**
	* Create a statement, with the option of not wrapping it in a
	* {@link DelegatingStatement}, which is the default.
	*/
	protected Statement createStatement(int type, int concur, boolean wrap)
	throws SQLException {
	Statement stmnt;
	if (_del != null)
	stmnt = _del.createStatement(type, concur, false);
	else
	stmnt = _conn.createStatement(type, concur);
	if (wrap)
	stmnt = new DelegatingStatement(stmnt, this);
	return stmnt;
	}

	public PreparedStatement prepareStatement(String str, int type, int concur)
	throws SQLException {
	return prepareStatement(str, type, concur, true);
	}

	/**
	* Prepare a statement, with the option of not wrapping it in a
	* {@link DelegatingPreparedStatement}, which is the default.
	*/
	protected PreparedStatement prepareStatement(String str, int type,
	int concur, boolean wrap) throws SQLException {
	PreparedStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareStatement(str, type, concur, false);
	else
	stmnt = _conn.prepareStatement(str, type, concur);
	if (wrap)
	stmnt = new DelegatingPreparedStatement(stmnt, this);
	return stmnt;
	}

	public CallableStatement prepareCall(String str, int type, int concur)
	throws SQLException {
	return prepareCall(str, type, concur, true);
	}

	/**
	* Prepare a call, with the option of not wrapping it in a
	* {@link DelegatingCallableStatement}, which is the default.
	*/
	protected CallableStatement prepareCall(String str, int type, int concur,
	boolean wrap) throws SQLException {
	CallableStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareCall(str, type, concur, false);
	else
	stmnt = _conn.prepareCall(str, type, concur);
	if (wrap)
	stmnt = new DelegatingCallableStatement(stmnt, this);
	return stmnt;
	}

	public Map<String, Class<?>> getTypeMap() throws SQLException {
	return _conn.getTypeMap();
	}

	public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
	_conn.setTypeMap(map);
	}

	// JDBC 3.0 methods follow.

	public void setHoldability(int holdability) throws SQLException {
	_conn.setHoldability(holdability);
	}

	public int getHoldability() throws SQLException {
	return _conn.getHoldability();
	}

	public Savepoint setSavepoint() throws SQLException {
	return _conn.setSavepoint();
	}

	public Savepoint setSavepoint(String savepoint) throws SQLException {
	return _conn.setSavepoint(savepoint);
	}

	public void rollback(Savepoint savepoint) throws SQLException {
	_conn.rollback(savepoint);
	}

	public void releaseSavepoint(Savepoint savepoint) throws SQLException {
	_conn.releaseSavepoint(savepoint);
	}

	public Statement createStatement(int resultSetType,
	int resultSetConcurrency, int resultSetHoldability)
	throws SQLException {
	return createStatement(resultSetType, resultSetConcurrency,
	resultSetHoldability, true);
	}

	protected Statement createStatement(int resultSetType,
	int resultSetConcurrency, int resultSetHoldability, boolean wrap)
	throws SQLException {
	Statement stmnt;
	if (_del != null)
	stmnt = _del.createStatement(resultSetType, resultSetConcurrency,
	resultSetHoldability, false);
	else {
	stmnt = _conn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
	}
	if (wrap)
	stmnt = new DelegatingStatement(stmnt, this);
	return stmnt;
	}

	public PreparedStatement prepareStatement(String sql,
	int resultSetType, int resultSetConcurrency, int resultSetHoldability)
	throws SQLException {
	return prepareStatement(sql, resultSetType, resultSetConcurrency,
	resultSetHoldability, true);
	}

	protected PreparedStatement prepareStatement(String sql,
	int resultSetType, int resultSetConcurrency, int resultSetHoldability,
	boolean wrap) throws SQLException {
	PreparedStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareStatement(sql, resultSetType,
	resultSetConcurrency, resultSetHoldability, false);
	else {
	stmnt = _conn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
	}
	if (wrap)
	stmnt = new DelegatingPreparedStatement(stmnt, this);
	return stmnt;
	}

	public CallableStatement prepareCall(String sql,
	int resultSetType, int resultSetConcurrency, int resultSetHoldability)
	throws SQLException {
	return prepareCall(sql, resultSetType, resultSetConcurrency,
	resultSetHoldability, true);
	}

	protected CallableStatement prepareCall(String sql, int resultSetType,
	int resultSetConcurrency, int resultSetHoldability, boolean wrap)
	throws SQLException {
	CallableStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareCall(sql, resultSetType,
	resultSetConcurrency, resultSetHoldability, false);
	else {
	stmnt = _conn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
	}
	if (wrap)
	stmnt = new DelegatingCallableStatement(stmnt, this);
	return stmnt;
	}

	public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
	throws SQLException {
	return prepareStatement(sql, autoGeneratedKeys, true);
	}

	protected PreparedStatement prepareStatement(String sql,
	int autoGeneratedKeys, boolean wrap) throws SQLException {
	PreparedStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareStatement(sql, autoGeneratedKeys);
	else {
	stmnt = _conn.prepareStatement(sql, autoGeneratedKeys);
	}
	if (wrap)
	stmnt = new DelegatingPreparedStatement(stmnt, this);
	return stmnt;
	}

	public PreparedStatement prepareStatement(String sql, int[] columnIndexes)
	throws SQLException {
	return prepareStatement(sql, columnIndexes, true);
	}

	protected PreparedStatement prepareStatement(String sql,
	int[] columnIndexes, boolean wrap) throws SQLException {
	PreparedStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareStatement(sql, columnIndexes, wrap);
	else {
	stmnt = _conn.prepareStatement(sql, columnIndexes);
	}
	if (wrap)
	stmnt = new DelegatingPreparedStatement(stmnt, this);
	return stmnt;
	}

	public PreparedStatement prepareStatement(String sql, String[] columnNames)
	throws SQLException {
	return prepareStatement(sql, columnNames, true);
	}

	protected PreparedStatement prepareStatement(String sql,
	String[] columnNames, boolean wrap) throws SQLException {
	PreparedStatement stmnt;
	if (_del != null)
	stmnt = _del.prepareStatement(sql, columnNames, wrap);
	else {
	stmnt = _conn.prepareStatement(sql, columnNames);
	}
	if (wrap)
	stmnt = new DelegatingPreparedStatement(stmnt, this);
	return stmnt;
	}

	// JDBC 4.0 methods follow.

	public boolean isWrapperFor(Class<?> iface) throws SQLException {
	return iface.isAssignableFrom(getDelegate().getClass());
	}

	/**
	* From java.sql.Wrapper javadoc:
	*
	* Returns an object that implements the given interface to allow access to
	* non-standard methods, or standard methods not exposed by the proxy. If
	* the receiver implements the interface then the result is the receiver
	* or a proxy for the receiver. If the receiver is a wrapper and the
	* wrapped object implements the interface then the result is the wrapped
	* object or a proxy for the wrapped object. Otherwise return the the
	* result of calling unwrap recursively on the wrapped object or a proxy
	* for that result. If the receiver is not a wrapper and does not implement
	* the interface, then an SQLException is thrown.
	*
	*/
	@Override
	public <T> T unwrap(Class<T> iface) throws SQLException {
	if (isWrapperFor(iface)) {
	return (T) getDelegate();
	} else {
	return getDelegate().unwrap(iface);
	}
	}

	public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
	return _conn.createArrayOf(typeName, elements);
	}

	public Blob createBlob() throws SQLException {
	return _conn.createBlob();
	}

	public Clob createClob() throws SQLException {
	return _conn.createClob();
	}

	public NClob createNClob() throws SQLException {
	return _conn.createNClob();
	}

	public SQLXML createSQLXML() throws SQLException {
	return _conn.createSQLXML();
	}

	public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
	return _conn.createStruct(typeName, attributes);
	}

	public Properties getClientInfo() throws SQLException {
	return _conn.getClientInfo();
	}

	public String getClientInfo(String name) throws SQLException {
	return _conn.getClientInfo(name);
	}

	public boolean isValid(int timeout) throws SQLException {
	return _conn.isValid(timeout);
	}

	public void setClientInfo(Properties properties) throws SQLClientInfoException {
	_conn.setClientInfo(properties);
	}

	public void setClientInfo(String name, String value) throws SQLClientInfoException {
	_conn.setClientInfo(name, value);
	}

	// Java 7 methods follow

	public void abort(Executor executor) throws SQLException {
	throw new UnsupportedOperationException();
	}

	public int getNetworkTimeout() throws SQLException{
	throw new UnsupportedOperationException();
	}

	public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException{
	throw new UnsupportedOperationException();
	}

	public String getSchema() throws SQLException {
	throw new UnsupportedOperationException();
	}

	public void setSchema(String schema)throws SQLException {
	throw new UnsupportedOperationException();
	}
	}