org.jboss.as.ejb3.inflow.AbstractInvocationHandler Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright (c) 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.ejb3.inflow;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
/**
* @author Carlo de Wolf
*/
abstract class AbstractInvocationHandler implements InvocationHandler {
protected abstract boolean doEquals(Object obj);
protected abstract Object doInvoke(Object proxy, Method method, Object[] args) throws Throwable;
@Override
public final boolean equals(Object obj) {
if (obj == this)
return true;
if (obj == null)
return false;
if (Proxy.isProxyClass(obj.getClass()))
return equals(Proxy.getInvocationHandler(obj));
// It might not be a JDK proxy that's handling this, so here we do a little trick.
// Normally you would do:
// if(!(obj instanceof EndpointInvocationHandler))
// return false;
if (!(obj instanceof AbstractInvocationHandler))
return obj.equals(this);
return doEquals(obj);
}
protected Object handle(Method method, Object[] args) throws Throwable {
try {
return method.invoke(this, args);
}
catch (InvocationTargetException e) {
throw e.getCause();
}
}
public abstract int hashCode();
@Override
public final Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (method.getDeclaringClass().equals(Object.class))
return handle(method, args);
return doInvoke(proxy, method, args);
}
}