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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: ScopeTestUtil.java reesbyars $
 ******************************************************************************/
package com.google.code.rees.scope.struts2.test;

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

import org.apache.struts2.dispatcher.Dispatcher;
import org.springframework.mock.web.MockHttpServletRequest;

import com.google.code.rees.scope.conversation.ConversationAdapter;
import com.google.code.rees.scope.conversation.ConversationConstants;
import com.google.code.rees.scope.conversation.ConversationUtil;
import com.google.code.rees.scope.conversation.annotations.ConversationField;
import com.google.code.rees.scope.conversation.configuration.DefaultConversationArbitrator;
import com.google.code.rees.scope.conversation.processing.ConversationManager;
import com.google.code.rees.scope.conversation.processing.DefaultInjectionConversationManager;
import com.google.code.rees.scope.session.SessionField;
import com.google.code.rees.scope.session.SessionUtil;
import com.google.code.rees.scope.struts2.ConventionConstants;
import com.google.code.rees.scope.struts2.StrutsScopeConstants;
import com.opensymphony.xwork2.ActionContext;

/**
 * A utility for simplifying Struts2 unit testing against the interceptor stack
 * 
 * @author rees.byars
 */
public class ScopeTestUtil {

    private static DefaultInjectionConversationManager manager;
    private static DefaultConversationArbitrator arbitrator = new DefaultConversationArbitrator();
    private static String actionSuffix;

    protected static DefaultInjectionConversationManager getconversationManager() {
        if (manager == null) {
            manager = (DefaultInjectionConversationManager) Dispatcher
                    .getInstance()
                    .getContainer()
                    .getInstance(ConversationManager.class,
                            StrutsScopeConstants.CONVERSATION_MANAGER_KEY);
        }
        return manager;
    }

    protected static String getActionSuffix() {
        if (actionSuffix == null) {
            actionSuffix = Dispatcher
                    .getInstance()
                    .getContainer()
                    .getInstance(String.class,
                            ConventionConstants.ACTION_SUFFIX);
        }
        return actionSuffix;
    }

    /**
     * For unit testing, sets the conversation IDs of the conversations in the
     * current thread
     * onto a given mock request.
     * 
     * @param request
     */
    public static void setConversationIdsOnRequest(
            MockHttpServletRequest request, Class actionClass) {
        ActionContext actionContext = ActionContext.getContext();
        @SuppressWarnings("unchecked")
        Map convoIdMap = ((Map) actionContext
                .getValueStack().findValue(
                        StrutsScopeConstants.CONVERSATION_ID_MAP_STACK_KEY));
        if (convoIdMap != null) {
            for (Entry entry : convoIdMap.entrySet()) {
                request.addParameter(entry.getKey(),
                        new String[] { entry.getValue() });
            }
        } else {
            for (String conversationName : arbitrator.getConversations(
                    actionClass, getActionSuffix())) {
                request.addParameter(
                        ConversationUtil.sanitizeName(conversationName)
                                + ConversationConstants.CONVERSATION_NAME_SUFFIX,
                        conversationName + "-test-id");
            }
        }
    }

    /**
     * The current values of session and conversation fields that are annotated
     * with {@link SessionField} and {@link ConversationField} are extracted
     * from the target object and placed into the session
     * and the active conversations available in the current thread.
     * 
     * @param target
     */
    public static void extractScopeFields(Object target) {
        SessionUtil.extractFields(target);
        getconversationManager().extractConversationFields(target,
                ConversationAdapter.getAdapter());
    }

    /**
     * The target object's session and conversation fields that are annotated
     * with {@link SessionField} and {@link ConversationField} are injected from
     * the session
     * and the active conversations available in the current thread.
     * 
     * @param target
     */
    public static void injectScopeFields(Object target) {
        SessionUtil.injectFields(target);
        getconversationManager().injectConversationFields(target,
                ConversationAdapter.getAdapter());
    }

}