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1   /*
2    * Copyright (c) 2007, Your Corporation. All Rights Reserved.
3    */
4   
5   /*
6    * Licensed to the Apache Software Foundation (ASF) under one
7    * or more contributor license agreements.  See the NOTICE file
8    * distributed with this work for additional information
9    * regarding copyright ownership.  The ASF licenses this file
10   * to you under the Apache License, Version 2.0 (the
11   * "License"); you may not use this file except in compliance
12   * with the License.  You may obtain a copy of the License at
13   *
14   *   http://www.apache.org/licenses/LICENSE-2.0
15   *
16   * Unless required by applicable law or agreed to in writing,
17   * software distributed under the License is distributed on an
18   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
19   * KIND, either express or implied.  See the License for the
20   * specific language governing permissions and limitations
21   * under the License.
22   */
23  
24  package org.apache.myfaces.orchestra.conversation.jsf;
25  
26  import org.apache.myfaces.orchestra.conversation.ConversationManager;
27  
28  import javax.faces.context.FacesContext;
29  
30  /***
31   * Some helpers usable for public use
32   */
33  public final class JsfConversationUtils
34  {
35  	private JsfConversationUtils()
36  	{
37  	}
38  
39  	/***
40  	 * <p>if no conversation with name <code>conversationName</code> is active a navigation with
41  	 * the given action will be issued</p>
42  	 * <p/>
43  	 * Notice: optionally you can use the conversationName as "fromAction" in your faces-config.xml
44  	 * </p>
45  	 */
46  	public static void ensureConversation(String conversationName, String action)
47  	{
48  		if (!ConversationManager.getInstance().hasConversation(conversationName))
49  		{
50  			FacesContext.getCurrentInstance().getApplication().getNavigationHandler().handleNavigation(
51  				FacesContext.getCurrentInstance(),
52  				conversationName,
53  				action
54  			);
55  		}
56  	}
57  }