1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
13   */
14  
15  package com.liferay.portlet;
16  
17  import com.liferay.portal.kernel.io.unsync.UnsyncByteArrayInputStream;
18  import com.liferay.portal.kernel.log.Log;
19  import com.liferay.portal.kernel.log.LogFactoryUtil;
20  import com.liferay.portal.kernel.util.LocaleUtil;
21  
22  import java.io.IOException;
23  
24  import java.util.HashMap;
25  import java.util.Iterator;
26  import java.util.LinkedHashMap;
27  import java.util.Locale;
28  import java.util.Map;
29  import java.util.MissingResourceException;
30  import java.util.PropertyResourceBundle;
31  import java.util.ResourceBundle;
32  import java.util.concurrent.ConcurrentHashMap;
33  
34  import javax.servlet.http.HttpServletRequest;
35  import javax.servlet.jsp.PageContext;
36  
37  import org.apache.struts.util.RequestUtils;
38  
39  /**
40   * <a href="PortletResourceBundles.java.html"><b><i>View Source</i></b></a>
41   *
42   * @author Brian Wing Shun Chan
43   */
44  public class PortletResourceBundles {
45  
46      public static String getString(Locale locale, String key) {
47          return _instance._getString(locale, key);
48      }
49  
50      public static String getString(PageContext pageContext, String key) {
51          return _instance._getString(pageContext, key);
52      }
53  
54      public static String getString(String languageId, String key) {
55          return _instance._getString(languageId, key);
56      }
57  
58      public static String getString(
59          String servletContextName, String languageId, String key) {
60  
61          return _instance._getString(servletContextName, languageId, key);
62      }
63  
64      public static void put(
65          String servletContextName, String languageId,
66          ResourceBundle resourceBundle) {
67  
68          _instance._put(servletContextName, languageId, resourceBundle);
69      }
70  
71      public static void remove(String servletContextName) {
72          _instance._remove(servletContextName);
73      }
74  
75      private Map<String, Map<String, ResourceBundle>> _resourceBundles;
76  
77      private PortletResourceBundles() {
78          _resourceBundles =
79              new ConcurrentHashMap<String, Map<String, ResourceBundle>>(
80                  new LinkedHashMap<String, Map<String, ResourceBundle>>());
81      }
82  
83      private ResourceBundle _getResourceBundle(
84          Map<String, ResourceBundle> resourceBundles, String languageId) {
85  
86          ResourceBundle resourceBundle = resourceBundles.get(languageId);
87  
88          if (resourceBundle == null) {
89              try {
90                  resourceBundle = new PropertyResourceBundle(
91                      new UnsyncByteArrayInputStream(new byte[0]));
92  
93                  resourceBundles.put(languageId, resourceBundle);
94              }
95              catch (IOException ioe) {
96                  _log.error(ioe);
97              }
98          }
99  
100         return resourceBundle;
101     }
102 
103     private ResourceBundle _getResourceBundle(
104         String servletContextName, String languageId) {
105 
106         Map<String, ResourceBundle> resourceBundles = _getResourceBundles(
107             servletContextName);
108 
109         return _getResourceBundle(resourceBundles, languageId);
110     }
111 
112     private Map<String, ResourceBundle> _getResourceBundles(
113         String servletContextName) {
114 
115         Map<String, ResourceBundle> resourceBundles = _resourceBundles.get(
116             servletContextName);
117 
118         if (resourceBundles == null) {
119             resourceBundles = new HashMap<String, ResourceBundle>();
120 
121             _resourceBundles.put(servletContextName, resourceBundles);
122         }
123 
124         return resourceBundles;
125     }
126 
127     private String _getString(Locale locale, String key) {
128         return _getString(LocaleUtil.toLanguageId(locale), key);
129     }
130 
131     private String _getString(PageContext pageContext, String key) {
132         Locale locale = RequestUtils.getUserLocale(
133             (HttpServletRequest)pageContext.getRequest(), null);
134 
135         return _getString(locale, key);
136     }
137 
138     private String _getString(String languageId, String key) {
139         return _getString(null, languageId, key);
140     }
141 
142     private String _getString(
143         String servletContextName, String languageId, String key) {
144 
145         if (servletContextName != null) {
146             ResourceBundle resourceBundle = _getResourceBundle(
147                 servletContextName, languageId);
148 
149             return resourceBundle.getString(key);
150         }
151 
152         Iterator<Map.Entry<String, Map<String, ResourceBundle>>> itr =
153             _resourceBundles.entrySet().iterator();
154 
155         while (itr.hasNext()) {
156             Map.Entry<String, Map<String, ResourceBundle>> entry = itr.next();
157 
158             Map<String, ResourceBundle> resourceBundles = entry.getValue();
159 
160             ResourceBundle resourceBundle = _getResourceBundle(
161                 resourceBundles, languageId);
162 
163             try {
164                 return resourceBundle.getString(key);
165             }
166             catch (MissingResourceException mre) {
167             }
168         }
169 
170         return null;
171     }
172 
173     private void _put(
174         String servletContextName, String languageId,
175         ResourceBundle resourceBundle) {
176 
177         Map<String, ResourceBundle> resourceBundles = _getResourceBundles(
178             servletContextName);
179 
180         resourceBundles.put(languageId, resourceBundle);
181     }
182 
183     private void _remove(String servletContextName) {
184         _resourceBundles.remove(servletContextName);
185     }
186 
187     private static Log _log = LogFactoryUtil.getLog(
188         PortletResourceBundles.class);
189 
190     private static PortletResourceBundles _instance =
191         new PortletResourceBundles();
192 
193 }