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   
   17   package org.apache.struts.chain.servlet;
   18   
   19   
   20   import java.util.Locale;
   21   import javax.servlet.http.HttpSession;
   22   import org.apache.commons.chain.Context;
   23   import org.apache.commons.chain.web.servlet.ServletWebContext;
   24   import org.apache.struts.Globals;
   25   import org.apache.struts.chain.AbstractSelectLocale;
   26   
   27   
   28   /**
   29    * <p>Select the <code>Locale</code> to be used for this request.</p>
   30    *
   31    * @version $Rev: 54933 $ $Date: 2004-10-16 18:04:52 +0100 (Sat, 16 Oct 2004) $
   32    */
   33   
   34   public class SelectLocale extends AbstractSelectLocale {
   35   
   36   
   37       // ------------------------------------------------------- Protected Methods
   38   
   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(Context context) {
   46   
   47           ServletWebContext swcontext = (ServletWebContext) context;
   48   
   49           // Has a Locale already been selected?
   50           HttpSession session = swcontext.getRequest().getSession();
   51           Locale locale = (Locale) session.getAttribute(Globals.LOCALE_KEY);
   52           if (locale != null) {
   53               return (locale);
   54           }
   55   
   56           // Select and cache the Locale to be used
   57           locale = swcontext.getRequest().getLocale();
   58           if (locale == null) {
   59               locale = Locale.getDefault();
   60           }
   61           session.setAttribute(Globals.LOCALE_KEY, locale);
   62           return (locale);
   63   
   64       }
   65   
   66   
   67   }