/*
* _DataSource.java
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Library 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.
*
* Author: Winter Lau
* http://dlog4j.sourceforge.net
*
*/
package com.liusoft.util.db;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.sql.Connection;
import javax.sql.DataSource;
/**
* ����Դ����Ľӹܣ�����Struts����ʹ�õ���dbcp���ӳ�
* ������ǽӹ�DataSource�ӿ�
* @author Winter Lau
*/
public class _DataSource implements InvocationHandler {
private DataSource dataSource;
private boolean encoding;
public _DataSource(DataSource ds, boolean encoding) {
dataSource = ds;
this.encoding = encoding;
}
/**
* ��ȡDataSource�Ĵ���
* @return
*/
public DataSource getDataSource() {
Class[] infs = dataSource.getClass().getInterfaces();
if(infs==null||infs.length==0)
infs = IDS;
return (DataSource) Proxy.newProxyInstance(
dataSource.getClass().getClassLoader(), infs, this);
}
public Object invoke(Object proxy, Method m, Object args[]) throws Throwable
{
if (METHOD_NAME.equals(m.getName())){
try {
Connection conn = (Connection) m.invoke(dataSource, args);
return (conn==null)?null:(new _Connection(conn,encoding)).getConnection();
} catch (InvocationTargetException e) {
throw e.getTargetException();
}
}
try {
return m.invoke(dataSource, args);
} catch (InvocationTargetException e) {
throw e.getTargetException();
}
}
private final static String METHOD_NAME = "getConnection";
private final static Class[] IDS = new Class[]{DataSource.class};
}