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A Struts2 plugin for leveraging conversation scopes in Struts2

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/*******************************************************************************
 * 
 *  Struts2-Conversation-Plugin - An Open Source Conversation- and Flow-Scope Solution for Struts2-based Applications
 *  =================================================================================================================
 * 
 *  Copyright (C) 2012 by Rees Byars
 *  http://code.google.com/p/struts2-conversation/
 * 
 * **********************************************************************************************************************
 * 
 *  Licensed 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.
 * 
 * **********************************************************************************************************************
 * 
 *  $Id: RequestContextUtil.java reesbyars $
 ******************************************************************************/
package com.google.code.rees.scope.util;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import javax.servlet.http.HttpServletRequest;

import com.google.code.rees.scope.conversation.configuration.ConversationSet;

/**
 * Utility for creating the RequestContexts for adapters
 * 
 * @author rees.byars
 */
public class RequestContextUtil {

    public static Map getRequestContext(HttpServletRequest request) {

        Map requestContext = new HashMap();
        if (request != null) {
            Map params = request.getParameterMap();
            ConversationSet realConversationNames = ConversationSet.get();
            for (Entry param : params.entrySet()) {
            	String candidateConversationName = param.getKey();
            	String candidateConversationId = param.getValue()[0];
                if (realConversationNames.contains(candidateConversationName)) {
                    requestContext.put(candidateConversationName, candidateConversationId);
                }
            }
        }

        return requestContext;
    }

}