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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  }