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1   /*
2    * $Id: SelectLocale.java 471754 2006-11-06 14:55:09Z husted $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  package org.apache.struts.chain.commands.servlet;
22  
23  import org.apache.commons.logging.Log;
24  import org.apache.commons.logging.LogFactory;
25  import org.apache.struts.Globals;
26  import org.apache.struts.chain.commands.AbstractSelectLocale;
27  import org.apache.struts.chain.contexts.ActionContext;
28  import org.apache.struts.chain.contexts.ServletActionContext;
29  
30  import javax.servlet.http.HttpSession;
31  
32  import java.util.Locale;
33  
34  /**
35   * <p>Select the <code>Locale</code> to be used for this request.</p>
36   *
37   * @version $Rev: 471754 $ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
38   *          $
39   */
40  public class SelectLocale extends AbstractSelectLocale {
41      private static final Log log = LogFactory.getLog(SelectLocale.class);
42  
43      // ------------------------------------------------------- Protected Methods
44  
45      /**
46       * <p>Return the <code>Locale</code> to be used for this request.</p>
47       *
48       * @param context The <code>Context</code> for this request
49       */
50      protected Locale getLocale(ActionContext context) {
51          ServletActionContext saContext = (ServletActionContext) context;
52  
53          // Has a Locale already been selected?
54          HttpSession session = saContext.getRequest().getSession();
55          Locale locale = (Locale) session.getAttribute(Globals.LOCALE_KEY);
56  
57          if (locale != null) {
58              return (locale);
59          }
60  
61          // Select and cache the Locale to be used
62          locale = saContext.getRequest().getLocale();
63  
64          if (locale == null) {
65              locale = Locale.getDefault();
66          }
67  
68          session.setAttribute(Globals.LOCALE_KEY, locale);
69  
70          return (locale);
71      }
72  }