package org.apache.ojb.broker.util.interceptor;
/* Copyright 2002-2005 The Apache Software Foundation
*
* Licensed 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.
*/
import java.lang.reflect.Method;
//#ifdef JDK13
import java.lang.reflect.InvocationHandler;
//#else
/*
import com.develop.java.lang.reflect.InvocationHandler;
*/
//#endif
/**
* @author Thomas Mahler
*/
public abstract class Interceptor implements InvocationHandler
{
private Object realSubject = null;
/**
* @see com.develop.java.lang.reflect.InvocationHandler#invoke(Object, Method, Object[])
*/
public Object invoke(Object proxy, Method methodToBeInvoked, Object[] args) throws Throwable
{
beforeInvoke(proxy, methodToBeInvoked, args);
Object result = null;
result = doInvoke(proxy, methodToBeInvoked, args);
afterInvoke(proxy, methodToBeInvoked, args);
return result;
}
/**
* this method will be invoked before methodToBeInvoked is invoked
*/
protected abstract void beforeInvoke(Object proxy, Method methodToBeInvoked, Object[] args)
throws Throwable;
/**
* this method will be invoked after methodToBeInvoked is invoked
*/
protected abstract void afterInvoke(Object proxy, Method methodToBeInvoked, Object[] args)
throws Throwable;
/**
* this method will be invoked after methodToBeInvoked is invoked
*/
protected Object doInvoke(Object proxy, Method methodToBeInvoked, Object[] args)
throws Throwable
{
Method m =
getRealSubject().getClass().getMethod(
methodToBeInvoked.getName(),
methodToBeInvoked.getParameterTypes());
return m.invoke(getRealSubject(), args);
}
/**
* Returns the realSubject.
* @return Object
*/
public Object getRealSubject()
{
return realSubject;
}
/**
* Sets the realSubject.
* @param realSubject The realSubject to set
*/
public void setRealSubject(Object realSubject)
{
this.realSubject = realSubject;
}
}
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