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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.interceptor;

import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.FutureTask;

import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageContentsList;
import org.apache.cxf.message.MessageImpl;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.apache.cxf.service.Service;
import org.apache.cxf.service.invoker.Invoker;

/**
 * Invokes a Binding's invoker with the INVOCATION_INPUT from
 * the Exchange.
 * @author Dan Diephouse
 */
public class ServiceInvokerInterceptor extends AbstractPhaseInterceptor {
    
    public ServiceInvokerInterceptor() {
        super(Phase.INVOKE);
    }

    public void handleMessage(final Message message) {
        final Exchange exchange = message.getExchange();
        final Endpoint endpoint = exchange.get(Endpoint.class);
        final Service service = endpoint.getService();
        final Invoker invoker = service.getInvoker();        

        Runnable invocation = new Runnable() {

            public void run() {
                Exchange runableEx = message.getExchange();
                Object result = invoker.invoke(runableEx, getInvokee(message));
                if (!exchange.isOneWay()) {
                    Endpoint ep = exchange.get(Endpoint.class);
                    
                    Message outMessage = runableEx.getOutMessage();
                    if (outMessage == null) {
                        outMessage = new MessageImpl();
                        outMessage.setExchange(exchange);
                        outMessage = ep.getBinding().createMessage(outMessage);
                        exchange.setOutMessage(outMessage);
                    }
                    copyJaxwsProperties(message, outMessage);
                    if (result != null) {
                        MessageContentsList resList = null;
                        if (result instanceof MessageContentsList) {
                            resList = (MessageContentsList)result;
                        } else if (result instanceof List) {
                            resList = new MessageContentsList((List)result);
                        } else if (result.getClass().isArray()) {
                            resList = new MessageContentsList((Object[])result);
                        } else {
                            outMessage.setContent(Object.class, result);                            
                        }
                        if (resList != null) {
                            outMessage.setContent(List.class, resList);
                        }
                    }                    
                }
            }

        };
        
        Executor executor = getExecutor(endpoint);
        Executor executor2 = exchange.get(Executor.class);
        if (executor2 == executor || executor == null) {
            // already executing on the appropriate executor
            invocation.run();
        } else {
            exchange.put(Executor.class, executor);
            FutureTask o = new FutureTask(invocation, null) {
                @Override
                protected void done() {
                    super.done();
                    synchronized (this) {
                        this.notifyAll();
                    }
                }
            };
            synchronized (o) {
                executor.execute(o);
                if (!o.isDone()) {
                    try {
                        o.wait();
                    } catch (InterruptedException e) {
                        //IGNORE
                    }
                }
                try {
                    o.get();
                } catch (InterruptedException e) {
                    throw new Fault(e);
                } catch (ExecutionException e) {
                    if (e.getCause() instanceof RuntimeException) {
                        throw (RuntimeException)e.getCause();
                    } else {
                        throw new Fault(e.getCause());
                    }
                }
            }
        }
    }
    
    private Object getInvokee(Message message) {
        Object invokee = message.getContent(List.class);
        if (invokee == null) {
            invokee = message.getContent(Object.class);
        }
        return invokee;
    }

    /**
     * Get the Executor for this invocation.
     * @param endpoint
     * @return
     */
    private Executor getExecutor(final Endpoint endpoint) {
        return endpoint.getService().getExecutor();
    }
    
    private void copyJaxwsProperties(Message inMsg, Message outMsg) {       
        outMsg.put(Message.WSDL_OPERATION, inMsg.get(Message.WSDL_OPERATION));
        outMsg.put(Message.WSDL_SERVICE, inMsg.get(Message.WSDL_SERVICE));
        outMsg.put(Message.WSDL_INTERFACE, inMsg.get(Message.WSDL_INTERFACE));
        outMsg.put(Message.WSDL_PORT, inMsg.get(Message.WSDL_PORT));
        outMsg.put(Message.WSDL_DESCRIPTION, inMsg.get(Message.WSDL_DESCRIPTION));
    }    
}
    

    

    

            

    

            



    
    






    
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