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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.databinding.wire;
import org.apache.tuscany.sca.databinding.Mediator;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Interceptor;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
/**
* Implementation of an interceptor that enforces pass-by-value semantics
* on operation invocations by copying the operation input and output data.
*
* @version $Rev$ $Date$
*/
public class PassByValueInterceptor implements Interceptor {
private Mediator mediator;
private Operation operation;
private Invoker nextInvoker;
private InvocationChain chain;
/**
* Constructs a new PassByValueInterceptor.
* @param dataBindings databinding extension point
* @param operation the intercepted operation
*/
public PassByValueInterceptor(Mediator mediator, InvocationChain chain, Operation operation) {
this.mediator = mediator;
this.chain = chain;
this.operation = operation;
}
public Message invoke(Message msg) {
if (chain.allowsPassByReference()) {
return nextInvoker.invoke(msg);
}
msg.setBody(mediator.copyInput(msg.getBody(), operation));
Message resultMsg = nextInvoker.invoke(msg);
if (!resultMsg.isFault() && operation.getOutputType() != null) {
resultMsg.setBody(mediator.copyOutput(resultMsg.getBody(), operation));
}
if (resultMsg.isFault()) {
resultMsg.setFaultBody(mediator.copyFault(resultMsg.getBody(), operation));
}
return resultMsg;
}
public Invoker getNext() {
return nextInvoker;
}
public void setNext(Invoker next) {
this.nextInvoker = next;
}
}
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