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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.core.invocation;
import java.lang.reflect.InvocationHandler;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.List;
import java.util.HashMap;
import org.apache.tuscany.sca.core.invocation.SCAProxy;
import org.apache.tuscany.sca.core.context.CallableReferenceImpl;
import org.apache.tuscany.sca.core.context.ServiceReferenceImpl;
import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
import org.apache.tuscany.sca.invocation.MessageFactory;
import org.apache.tuscany.sca.runtime.RuntimeWire;
import org.osoa.sca.CallableReference;
import org.osoa.sca.ServiceReference;
/**
* the default implementation of a wire service that uses JDK dynamic proxies
*
* @version $Rev$ $Date$
*/
public class JDKProxyFactory implements ProxyFactory {
protected InterfaceContractMapper contractMapper;
private MessageFactory messageFactory;
public JDKProxyFactory(MessageFactory messageFactory, InterfaceContractMapper mapper) {
this.contractMapper = mapper;
this.messageFactory = messageFactory;
}
/**
* The original createProxy method assumes that the proxy doesn't want to
* share conversation state so sets the conversation object to null
*/
public <T> T createProxy(Class<T> interfaze, RuntimeWire wire) throws ProxyCreationException {
ServiceReference<T> serviceReference = new ServiceReferenceImpl(interfaze, wire, this);
return createProxy(serviceReference);
}
public <T> T createProxy(CallableReference<T> callableReference) throws ProxyCreationException {
assert callableReference != null;
final Class<T> interfaze = callableReference.getBusinessInterface();
InvocationHandler handler = new JDKInvocationHandler(messageFactory, callableReference);
// Allow privileged access to class loader. Requires RuntimePermission in security policy.
ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return interfaze.getClassLoader();
}
});
Object proxy = SCAProxy.newProxyInstance(cl, new Class[] {interfaze}, handler);
((CallableReferenceImpl)callableReference).setProxy(proxy);
return interfaze.cast(proxy);
}
public <T> T createCallbackProxy(Class<T> interfaze, List<RuntimeWire> wires) throws ProxyCreationException {
CallbackReferenceImpl<T> callbackReference = CallbackReferenceImpl.newInstance(interfaze, this, wires);
return callbackReference != null ? createCallbackProxy(callbackReference) : null;
}
public <T> T createCallbackProxy(CallbackReferenceImpl<T> callbackReference) throws ProxyCreationException {
assert callbackReference != null;
Class<T> interfaze = callbackReference.getBusinessInterface();
InvocationHandler handler = new JDKCallbackInvocationHandler(messageFactory, callbackReference);
ClassLoader cl = interfaze.getClassLoader();
Object proxy = SCAProxy.newProxyInstance(cl, new Class[] {interfaze}, handler);
callbackReference.setProxy(proxy);
return interfaze.cast(proxy);
}
public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException {
InvocationHandler handler = SCAProxy.getInvocationHandler(target);
if (handler instanceof JDKInvocationHandler) {
return (R)((JDKInvocationHandler)handler).getCallableReference();
} else {
throw new IllegalArgumentException("The object is not a known proxy.");
}
}
/**
* @see org.apache.tuscany.sca.core.invocation.ProxyFactory#isProxyClass(java.lang.Class)
*/
public boolean isProxyClass(Class<?> clazz) {
return SCAProxy.isProxyClass(clazz);
}
}
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