1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.language;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  
27  import java.util.Locale;
28  import java.util.Map;
29  import java.util.concurrent.ConcurrentHashMap;
30  
31  import org.apache.struts.util.MessageResources;
32  
33  /**
34   * <a href="LanguageResources.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Brian Wing Shun Chan
37   */
38  public class LanguageResources {
39  
40      public static void clearCache() {
41          _instance._clearCache();
42      }
43  
44      public static String getMessage(Locale locale, String key) {
45          return _instance._getMessage(locale, key);
46      }
47  
48      public static void init(MessageResources messageResources) {
49          _instance._init(messageResources);
50      }
51  
52      public static boolean isInitialized() {
53          if (_instance._messageResources == null) {
54              return true;
55          }
56          else {
57              return false;
58          }
59      }
60  
61      private LanguageResources() {
62          _cache = new ConcurrentHashMap<String, ResourceValue>(10000);
63      }
64  
65      private void _clearCache() {
66          _cache.clear();
67      }
68  
69      private String _getCacheKey(Locale locale, String key) {
70          StringBuilder sb = new StringBuilder(String.valueOf(locale));
71  
72          sb.append(StringPool.POUND);
73          sb.append(key);
74  
75          return sb.toString();
76      }
77  
78      private String _getMessage(Locale locale, String key) {
79          String cacheKey = _getCacheKey(locale, key);
80  
81          ResourceValue resourceValue = _cache.get(cacheKey);
82  
83          if (resourceValue == null) {
84              String value = _messageResources.getMessage(locale, key);
85  
86              resourceValue = new ResourceValue(value);
87  
88              _cache.put(cacheKey, resourceValue);
89          }
90  
91          return resourceValue.getValue();
92      }
93  
94      private void _init(MessageResources messageResources) {
95          _messageResources = messageResources;
96      }
97  
98      private class ResourceValue {
99  
100         private ResourceValue(String value) {
101             _value = value;
102         }
103 
104         public String getValue() {
105             return _value;
106         }
107 
108         private String _value;
109 
110     }
111 
112     private static LanguageResources _instance = new LanguageResources();
113 
114     private Map<String, ResourceValue> _cache;
115     private MessageResources _messageResources;
116 
117 }