/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

/*
 * Copyright 2004-2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
 
/*
 * $Header: /cvs/glassfish/admin/mbeanapi-impl/src/java/com/sun/enterprise/management/support/DelegateInvocationHandler.java,v 1.3 2007/05/05 05:23:41 tcfujii Exp $
 * $Revision: 1.3 $
 * $Date: 2007/05/05 05:23:41 $
 */

package com.sun.enterprise.management.support;

import java.lang.reflect.Proxy;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationHandler;

import com.sun.appserv.management.util.misc.ClassUtil;

/**
 */
public final class DelegateInvocationHandler implements InvocationHandler
{
	private final Delegate	mDelegate;
	
		private
	DelegateInvocationHandler( final Delegate delegate )
	{
		mDelegate	= delegate;
	}
	
		static public Object
	newProxyInstance(
		Delegate	delegate,
		Class		interfaceClass )
	{
		final DelegateInvocationHandler	handler	=
			new DelegateInvocationHandler( delegate );
			
		final ClassLoader		classLoader	= interfaceClass.getClassLoader();
		
		final Class[]	interfaces	= new Class[] { interfaceClass };
		final Object proxy	= Proxy.newProxyInstance( classLoader,
							interfaces, handler);
		
		return( proxy );
	}
	
	/**
		Just forward whatever it is to the Delegate
	 */
		public Object
	invoke(
		Object		proxy,
    	Method		method,
		Object[]	args
		)
   		throws java.lang.Throwable
   	{
   		final Class[]	sig	= method.getParameterTypes();
   		
   		return( mDelegate.invoke( method.getName(), args, ClassUtil.classnamesFromSignature( sig ) ) );
   	}
	
}