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    1   /*
    2    * $Id: DefaultLocaleResolver.java 637434 2008-03-15 15:48:38Z apetrelli $
    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.tiles.locale.impl;
   22   
   23   import java.util.Locale;
   24   import java.util.Map;
   25   
   26   import org.apache.tiles.context.TilesRequestContext;
   27   import org.apache.tiles.locale.LocaleResolver;
   28   
   29   /**
   30    * Default implementation of <code>LocaleResolver</code><br>
   31    * It tries to take the locale from the session-scoped attribute
   32    * {@link DefaultLocaleResolver#LOCALE_KEY}. If it is not found, it returns the
   33    * locale included in the request.
   34    *
   35    * @version $Rev: 637434 $ $Date: 2008-03-15 16:48:38 +0100 (sab, 15 mar 2008) $
   36    */
   37   public class DefaultLocaleResolver implements LocaleResolver {
   38   
   39       /**
   40        * The attribute name that is used to store the current locale.
   41        */
   42       public static final String LOCALE_KEY = "org.apache.tiles.LOCALE";
   43   
   44       /** {@inheritDoc} */
   45       public void init(Map<String, String> params) {
   46           // Does nothing.
   47       }
   48   
   49       /** {@inheritDoc} */
   50       public Locale resolveLocale(TilesRequestContext request) {
   51           Locale retValue = null;
   52           Map<String, Object> session = request.getSessionScope();
   53           if (session != null) {
   54               retValue = (Locale) session.get(DefaultLocaleResolver.LOCALE_KEY);
   55           }
   56           if (retValue == null) {
   57               retValue = request.getRequestLocale();
   58           }
   59   
   60           return retValue;
   61       }
   62   }

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