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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.cxf.jaxrs.client;

import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
import org.apache.cxf.common.classloader.ClassLoaderUtils;
import org.apache.cxf.common.classloader.ClassLoaderUtils.ClassLoaderHolder;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.PhaseInterceptorChain;
import org.apache.cxf.transport.MessageObserver;

class ClientMessageObserver implements MessageObserver {

    private ClientConfiguration cfg;
    private ClassLoader loader;
    
    public ClientMessageObserver(ClientConfiguration cfg) {
        this.cfg = cfg;
        loader = cfg.getBus().getExtension(ClassLoader.class);
    }
    
    public void onMessage(Message m) {
        
        Message message = cfg.getConduitSelector().getEndpoint().getBinding().createMessage(m);
        message.put(Message.REQUESTOR_ROLE, Boolean.TRUE);
        message.put(Message.INBOUND_MESSAGE, Boolean.TRUE);
        PhaseInterceptorChain chain = AbstractClient.setupInInterceptorChain(cfg);
        message.setInterceptorChain(chain);
        message.getExchange().setInMessage(message);
        Bus bus = cfg.getBus();
        Bus origBus = BusFactory.getAndSetThreadDefaultBus(bus);
        ClassLoaderHolder origLoader = null;
        try {
            if (loader != null) {
                origLoader = ClassLoaderUtils.setThreadContextClassloader(loader);
            }
            // execute chain
            chain.doIntercept(message);
        } finally {
            if (origBus != bus) {
                BusFactory.setThreadDefaultBus(origBus);
            }
            if (origLoader != null) {
                origLoader.reset();
            }
            synchronized (message.getExchange()) {
                message.getExchange().notifyAll();
            }
        }
    }
    
}