com.mysql.jdbc.jdbc2.optional.JDBC4ConnectionWrapper Maven / Gradle / Ivy
/*
Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
, 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.jdbc2.optional;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.sql.Array;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.NClob;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import com.mysql.jdbc.ConnectionImpl;
import com.mysql.jdbc.SQLError;
public class JDBC4ConnectionWrapper extends ConnectionWrapper {
/**
* 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 JDBC4ConnectionWrapper(MysqlPooledConnection mysqlPooledConnection, com.mysql.jdbc.Connection mysqlConnection, boolean forXa) throws SQLException {
super(mysqlPooledConnection, mysqlConnection, forXa);
}
public void close() throws SQLException {
try {
super.close();
} finally {
this.unwrappedInterfaces = null;
}
}
public SQLXML createSQLXML() throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).createSQLXML();
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
public java.sql.Array createArrayOf(String typeName, Object[] elements) throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).createArrayOf(typeName, elements);
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).createStruct(typeName, attributes);
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
public Properties getClientInfo() throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).getClientInfo();
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
public String getClientInfo(String name) throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).getClientInfo(name);
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
/**
* Returns true if the connection has not been closed and is still valid.
* The driver shall submit a query on the connection or use some other
* mechanism that positively verifies the connection is still valid when
* this method is called.
*
* The query submitted by the driver to validate the connection shall be executed in the context of the current transaction.
*
* @param timeout
* -
* The time in seconds to wait for the database operation used to
* validate the connection to complete. If the timeout period
* expires before the operation completes, this method returns
* false. A value of 0 indicates a timeout is not applied to the
* database operation.
*
* @return true if the connection is valid, false otherwise
* @exception SQLException
* if the value supplied for timeout is less
* then 0
* @since 1.6
*/
public synchronized boolean isValid(int timeout) throws SQLException {
try {
return ((java.sql.Connection) this.mc).isValid(timeout);
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return false; // never reached, but compiler can't tell
}
public void setClientInfo(Properties properties) throws SQLClientInfoException {
try {
checkClosed();
((java.sql.Connection) this.mc).setClientInfo(properties);
} catch (SQLException sqlException) {
try {
checkAndFireConnectionError(sqlException);
} catch (SQLException sqlEx2) {
SQLClientInfoException clientEx = new SQLClientInfoException();
clientEx.initCause(sqlEx2);
throw clientEx;
}
}
}
public void setClientInfo(String name, String value) throws SQLClientInfoException {
try {
checkClosed();
((java.sql.Connection) this.mc).setClientInfo(name, value);
} catch (SQLException sqlException) {
try {
checkAndFireConnectionError(sqlException);
} catch (SQLException sqlEx2) {
SQLClientInfoException clientEx = new SQLClientInfoException();
clientEx.initCause(sqlEx2);
throw clientEx;
}
}
}
/**
* Returns true if this either implements the interface argument or is
* directly or indirectly a wrapper for an object that does. Returns false
* otherwise. If this implements the interface then return true, else if
* this is a wrapper then return the result of recursively calling isWrapperFor on the wrapped object. If this does not
* implement the interface and is not a wrapper, return false. This method
* should be implemented as a low-cost operation compared to unwrap so that callers can use this method to avoid
* expensive unwrap calls that may fail. If this method
* returns true then calling unwrap with the same argument
* should succeed.
*
* @param interfaces
* a Class defining an interface.
* @return true if this implements the interface or directly or indirectly
* wraps an object that does.
* @throws java.sql.SQLException
* if an error occurs while determining whether this is a
* wrapper for an object with the given interface.
* @since 1.6
*/
public boolean isWrapperFor(Class iface) throws SQLException {
checkClosed();
boolean isInstance = iface.isInstance(this);
if (isInstance) {
return true;
}
return (iface.getName().equals("com.mysql.jdbc.Connection") || iface.getName().equals("com.mysql.jdbc.ConnectionProperties"));
}
/**
* Returns an object that implements the given interface to allow access to
* non-standard methods, or standard methods not exposed by the proxy. The
* result may be either the object found to implement the interface or a
* proxy for that object. If the receiver implements the interface then that
* is the object. If the receiver is a wrapper and the wrapped object
* implements the interface then that is the object. Otherwise the object is
* the result of calling unwrap recursively on the wrapped
* object. If the receiver is not a wrapper and does not implement the
* interface, then an SQLException is thrown.
*
* @param iface
* A Class defining an interface that the result must implement.
* @return an object that implements the interface. May be a proxy for the
* actual implementing object.
* @throws java.sql.SQLException
* If no object found that implements the interface
* @since 1.6
*/
public synchronized T unwrap(java.lang.Class iface) throws java.sql.SQLException {
try {
if ("java.sql.Connection".equals(iface.getName()) || "java.sql.Wrapper.class".equals(iface.getName())) {
return iface.cast(this);
}
if (unwrappedInterfaces == null) {
unwrappedInterfaces = new HashMap();
}
Object cachedUnwrapped = unwrappedInterfaces.get(iface);
if (cachedUnwrapped == null) {
cachedUnwrapped = Proxy.newProxyInstance(this.mc.getClass().getClassLoader(), new Class[] { iface },
new ConnectionErrorFiringInvocationHandler(this.mc));
unwrappedInterfaces.put(iface, cachedUnwrapped);
}
return iface.cast(cachedUnwrapped);
} catch (ClassCastException cce) {
throw SQLError.createSQLException("Unable to unwrap to " + iface.toString(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
}
/**
* @see java.sql.Connection#createBlob()
*/
public Blob createBlob() throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).createBlob();
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
/**
* @see java.sql.Connection#createClob()
*/
public Clob createClob() throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).createClob();
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
/**
* @see java.sql.Connection#createNClob()
*/
public NClob createNClob() throws SQLException {
checkClosed();
try {
return ((java.sql.Connection) this.mc).createNClob();
} catch (SQLException sqlException) {
checkAndFireConnectionError(sqlException);
}
return null; // never reached, but compiler can't tell
}
}