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1   /*
2    * Copyright 2003,2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.struts.chain.commands.servlet;
17  
18  import org.apache.commons.logging.Log;
19  import org.apache.commons.logging.LogFactory;
20  import org.apache.struts.Globals;
21  import org.apache.struts.chain.commands.AbstractSelectLocale;
22  import org.apache.struts.chain.contexts.ActionContext;
23  import org.apache.struts.chain.contexts.ServletActionContext;
24  
25  import javax.servlet.http.HttpSession;
26  
27  import java.util.Locale;
28  
29  /***
30   * <p>Select the <code>Locale</code> to be used for this request.</p>
31   *
32   * @version $Rev: 421119 $ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
33   *          $
34   */
35  public class SelectLocale extends AbstractSelectLocale {
36      private static final Log log = LogFactory.getLog(SelectLocale.class);
37  
38      // ------------------------------------------------------- Protected Methods
39  
40      /***
41       * <p>Return the <code>Locale</code> to be used for this request.</p>
42       *
43       * @param context The <code>Context</code> for this request
44       */
45      protected Locale getLocale(ActionContext context) {
46          ServletActionContext saContext = (ServletActionContext) context;
47  
48          // Has a Locale already been selected?
49          HttpSession session = saContext.getRequest().getSession();
50          Locale locale = (Locale) session.getAttribute(Globals.LOCALE_KEY);
51  
52          if (locale != null) {
53              return (locale);
54          }
55  
56          // Select and cache the Locale to be used
57          locale = saContext.getRequest().getLocale();
58  
59          if (locale == null) {
60              locale = Locale.getDefault();
61          }
62  
63          session.setAttribute(Globals.LOCALE_KEY, locale);
64  
65          return (locale);
66      }
67  }