/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.core.cxf.interceptors;

 import org.apache.commons.lang.StringUtils;

 import org.apache.cxf.interceptor.Fault;

 import org.apache.cxf.message.Message;

 import org.apache.cxf.phase.AbstractPhaseInterceptor;

 import org.apache.cxf.phase.Phase;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.api.config.property.ConfigContext;

 import org.kuali.rice.core.api.config.property.Config;

 import java.util.Collections;

 import java.util.List;

 import java.util.Map;

 /**

  * A CXF Interceptor that binds itself to the USER_PROTOCOL phase to be used on outbound

  * messages.   The role of this interceptor is to populate outgoing protocol headers

  * (for all intents and purposes, HTTP headers) with Kuali Rice and application version

  * information.

  * @see <a href="http://cxf.apache.org/docs/interceptors.html">CXF interceptors</a>

  */

 public class ServiceCallVersioningOutInterceptor extends AbstractPhaseInterceptor<Message> {

     /**

      * Instantiates an ServiceCallVersioningOutInterceptor and adds it to the USER_PROTOCOL phase.

      */

     public ServiceCallVersioningOutInterceptor() {

         super(Phase.USER_PROTOCOL);

     }

     /**

      * Publishes the Kuali Rice Environment, Rice Version, Application Name and Application Version

      * in outbound protocol headers

      */

     @Override

     public void handleMessage(final Message message) throws Fault {

         Map<String, List<String>> headers = (Map<String, List<String>>) message.get(Message.PROTOCOL_HEADERS);

         if (headers != null) {

             ServiceCallVersioningHelper.populateVersionHeaders(headers);

         }

     }

 }