/*
 * 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.binding.sca.provider;

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;
import org.apache.tuscany.sca.invocation.DataExchangeSemantics;

/**
 * @version $Rev$ $Date$
 */
public class SCABindingInvoker implements Interceptor, DataExchangeSemantics {
    private InvocationChain chain;
    
    /**
     * Construct a SCABindingInvoker that delegates to the service invocaiton chain
     * @param chain
     */
    public SCABindingInvoker(InvocationChain chain) {
        super();
        this.chain = chain;
    }

    /**
     * @see org.apache.tuscany.sca.invocation.Interceptor#getNext()
     */
    public Invoker getNext() {
        return chain.getHeadInvoker();
    }

    /**
     * @see org.apache.tuscany.sca.invocation.Interceptor#setNext(org.apache.tuscany.sca.invocation.Invoker)
     */
    public void setNext(Invoker next) {
        // NOOP
    }

    /**
     * @see org.apache.tuscany.sca.invocation.Invoker#invoke(org.apache.tuscany.sca.invocation.Message)
     */
    public Message invoke(Message msg) {
        return getNext().invoke(msg);
    }

    /**
     * @see org.apache.tuscany.sca.invocation.DataExchangeSemantics#allowsPassByReference()
     */
    public boolean allowsPassByReference() {
        return false;
//        return chain.allowsPassByReference();
    }

}