/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt 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.aop;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aop.joinpoint.InvocationResponse;
import org.jboss.aop.joinpoint.MethodInvocation;
import org.jboss.aop.proxy.ClassProxy;
import org.jboss.aop.proxy.ClassProxyFactory;
import org.jboss.aop.proxy.Proxy;
import org.jboss.aop.util.reference.MethodPersistentReference;
/**
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 62492 $
*/
public class Dispatcher
{
public static final String DISPATCHER = "DISPATCHER";
public static final String OID = "OID";
public static final Dispatcher singleton = new Dispatcher();
Map targetMap = new ConcurrentHashMap();
public boolean isRegistered(Object oid)
{
return targetMap.containsKey(oid);
}
/**
* Register an Object ID with an actual target object
*/
public void registerTarget(Object oid, Object target)
{
targetMap.put(oid, target);
}
public void unregisterTarget(Object oid)
{
targetMap.remove(oid);
}
public Object getRegistered(Object oid)
{
return targetMap.get(oid);
}
public InvocationResponse invoke(Invocation invocation) throws NotFoundInDispatcherException, Throwable
{
Object oid = invocation.getMetaData(DISPATCHER, OID);
Object target = null;
target = targetMap.get(oid);
if (target == null)
{
throw new NotFoundInDispatcherException(oid);
}
if (target instanceof ClassProxy)
{
ClassProxy proxy = (ClassProxy) target;
return proxy._dynamicInvoke(invocation);
}
else if (target instanceof Proxy)
{
Proxy proxy = (Proxy) target;
return proxy._dynamicInvoke(invocation);
}
else if (target instanceof Advised)
{
Advisor advisor = ((Advised) target)._getAdvisor();
return advisor.dynamicInvoke(target, invocation);
}
else if (target instanceof Advisor)
{
Advisor advisor = (Advisor) target;
return advisor.dynamicInvoke(null, invocation);
}
else
{
if (invocation instanceof MethodInvocation)
{
MethodInvocation methodInvocation = (MethodInvocation) invocation;
// For non-advised methods, we can only do public method invocations
long methodHash = methodInvocation.getMethodHash();
HashMap methodMap = ClassProxyFactory.getMethodMap(target.getClass());
MethodPersistentReference ref = (MethodPersistentReference)methodMap.get(new Long(methodHash));
Method method = (Method)ref.get();
Object[] args = methodInvocation.getArguments();
try
{
return new InvocationResponse(method.invoke(target, args));
}
catch (InvocationTargetException ex)
{
throw ex.getTargetException();
}
}
else
{
throw new RuntimeException("field invocations not implemented");
}
}
}
}