/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and/or its affiliates, and individual
* contributors by the @authors tag. See the copyright.txt in the
* distribution for a full listing of individual contributors.
*
* 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.
*/
package org.jboss.solder.serviceHandler;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Map;
import javax.interceptor.InvocationContext;
import javassist.util.proxy.MethodHandler;
/**
* MethodHandler that forwards calls to abstract methods to the service handler
* instance
*
* @author Stuart Douglas
*/
public class ServiceHandlerMethodHandler<T, H> implements MethodHandler {
private final ServiceHandlerManager<H> handler;
private final H handlerInstance;
public ServiceHandlerMethodHandler(ServiceHandlerManager<H> handler, H handlerInstance) {
this.handler = handler;
this.handlerInstance = handlerInstance;
}
public Object invoke(Object self, Method thisMethod, Method proceed, Object[] args) throws Throwable {
if (proceed == null) {
return handler.invoke(handlerInstance, new InvocationContextImpl(self, thisMethod, args));
}
return proceed.invoke(self, args);
}
private final class InvocationContextImpl implements InvocationContext {
public InvocationContextImpl(Object target, Method method, Object[] params) {
this.target = target;
this.method = method;
this.params = params;
}
private final Object target;
private final Method method;
private final Object[] params;
public Map<String, Object> getContextData() {
return Collections.emptyMap();
}
public Method getMethod() {
return method;
}
public Object[] getParameters() {
return params;
}
public Object getTarget() {
return target;
}
public Object getTimer() {
return null;
}
public Object proceed() throws Exception {
throw new UnsupportedOperationException("Cannot call proceed() in AutoProxy invocation handler");
}
public void setParameters(Object[] params) {
throw new UnsupportedOperationException("Cannot call setParameters() in AutoProxy invocation handler");
}
}
}