1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.kernel.util;
16  
17  import com.liferay.portal.kernel.log.Log;
18  import com.liferay.portal.kernel.log.LogFactoryUtil;
19  
20  import java.util.Arrays;
21  import java.util.HashMap;
22  import java.util.Locale;
23  import java.util.Map;
24  
25  /**
26   * <a href="LocaleUtil.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Brian Wing Shun Chan
29   */
30  public class LocaleUtil {
31  
32      public static Locale fromLanguageId(String languageId) {
33          return _instance._fromLanguageId(languageId);
34      }
35  
36      public static Locale[] fromLanguageIds(String[] languageIds) {
37          return _instance._fromLanguageIds(languageIds);
38      }
39  
40      public static Locale getDefault() {
41          return _instance._getDefault();
42      }
43  
44      public static LocaleUtil getInstance() {
45          return _instance;
46      }
47  
48      public static void setDefault(
49          String userLanguage, String userCountry, String userVariant) {
50  
51          _instance._setDefault(userLanguage, userCountry, userVariant);
52      }
53  
54      public static String toLanguageId(Locale locale) {
55          return _instance._toLanguageId(locale);
56      }
57  
58      public static String[] toLanguageIds(Locale[] locales) {
59          return _instance._toLanguageIds(locales);
60      }
61  
62      public static String toW3cLanguageId(Locale locale) {
63          return _instance._toW3cLanguageId(locale);
64      }
65  
66      public static String toW3cLanguageId(String languageId) {
67          return _instance._toW3cLanguageId(languageId);
68      }
69  
70      public static String[] toW3cLanguageIds(Locale[] locales) {
71          return _instance._toW3cLanguageIds(locales);
72      }
73  
74      public static String[] toW3cLanguageIds(String[] languageIds) {
75          return _instance._toW3cLanguageIds(languageIds);
76      }
77  
78      private LocaleUtil() {
79          _locale = new Locale("en", "US");
80  
81          _isoCountries = Locale.getISOCountries().clone();
82  
83          for (int i = 0; i < _isoCountries.length; i++) {
84              _isoCountries[i] = _isoCountries[i].toUpperCase();
85          }
86  
87          Arrays.sort(_isoCountries);
88  
89          _isoLanguages = Locale.getISOLanguages().clone();
90  
91          for (int i = 0; i < _isoLanguages.length; i++) {
92              _isoLanguages[i] = _isoLanguages[i].toLowerCase();
93          }
94  
95          Arrays.sort(_isoLanguages);
96      }
97  
98      private Locale _fromLanguageId(String languageId) {
99          if (languageId == null) {
100             return _locale;
101         }
102 
103         Locale locale = null;
104 
105         try {
106             locale = _locales.get(languageId);
107 
108             if (locale == null) {
109                 int pos = languageId.indexOf(StringPool.UNDERLINE);
110 
111                 if (pos == -1) {
112                     if (Arrays.binarySearch(_isoLanguages, languageId) < 0) {
113                         return _getDefault();
114                     }
115 
116                     locale = new Locale(languageId);
117                 }
118                 else {
119                     String languageCode = languageId.substring(0, pos);
120                     String countryCode = languageId.substring(
121                         pos + 1, languageId.length());
122 
123                     if ((Arrays.binarySearch(
124                             _isoLanguages, languageCode) < 0) ||
125                         (Arrays.binarySearch(_isoCountries, countryCode) < 0)) {
126 
127                         return _getDefault();
128                     }
129 
130                     locale = new Locale(languageCode, countryCode);
131                 }
132 
133                 _locales.put(languageId, locale);
134             }
135         }
136         catch (Exception e) {
137             if (_log.isWarnEnabled()) {
138                 _log.warn(languageId + " is not a valid language id");
139             }
140         }
141 
142         if (locale == null) {
143             locale = _locale;
144         }
145 
146         return locale;
147     }
148 
149     private Locale[] _fromLanguageIds(String[] languageIds) {
150         Locale[] locales = new Locale[languageIds.length];
151 
152         for (int i = 0; i < languageIds.length; i++) {
153             locales[i] = _fromLanguageId(languageIds[i]);
154         }
155 
156         return locales;
157     }
158 
159     private Locale _getDefault() {
160         return _locale;
161     }
162 
163     public void _setDefault(
164         String userLanguage, String userCountry, String userVariant) {
165 
166         if (Validator.isNotNull(userLanguage) &&
167             Validator.isNull(userCountry) && Validator.isNull(userVariant)) {
168 
169             _locale = new Locale(userLanguage);
170         }
171         else if (Validator.isNotNull(userLanguage) &&
172                  Validator.isNotNull(userCountry) &&
173                  Validator.isNull(userVariant)) {
174 
175             _locale = new Locale(userLanguage, userCountry);
176         }
177         else if (Validator.isNotNull(userLanguage) &&
178                  Validator.isNotNull(userCountry) &&
179                  Validator.isNotNull(userVariant)) {
180 
181             _locale = new Locale(userLanguage, userCountry, userVariant);
182         }
183     }
184 
185     private String _toLanguageId(Locale locale) {
186         if (locale == null) {
187             locale = _locale;
188         }
189 
190         String languageId = locale.getLanguage();
191 
192         if (Validator.isNotNull(locale.getCountry())) {
193             languageId = languageId.concat(StringPool.UNDERLINE);
194             languageId = languageId.concat(locale.getCountry());
195         }
196 
197         return languageId;
198     }
199 
200     private String[] _toLanguageIds(Locale[] locales) {
201         String[] languageIds = new String[locales.length];
202 
203         for (int i = 0; i < locales.length; i++) {
204             languageIds[i] = _toLanguageId(locales[i]);
205         }
206 
207         return languageIds;
208     }
209 
210     private String _toW3cLanguageId(Locale locale) {
211         return _toW3cLanguageId(_toLanguageId(locale));
212     }
213 
214     private String _toW3cLanguageId(String languageId) {
215         return StringUtil.replace(
216             languageId, StringPool.UNDERLINE, StringPool.MINUS);
217     }
218 
219     private String[] _toW3cLanguageIds(Locale[] locales) {
220         return _toW3cLanguageIds(_toLanguageIds(locales));
221     }
222 
223     private String[] _toW3cLanguageIds(String[] languageIds) {
224         String[] w3cLanguageIds = new String[languageIds.length];
225 
226         for (int i = 0; i < languageIds.length; i++) {
227             w3cLanguageIds[i] = _toW3cLanguageId(languageIds[i]);
228         }
229 
230         return w3cLanguageIds;
231     }
232 
233     private static Log _log = LogFactoryUtil.getLog(LocaleUtil.class);
234 
235     private static LocaleUtil _instance = new LocaleUtil();
236 
237     private String[] _isoCountries;
238     private String[] _isoLanguages;
239     private Locale _locale;
240     private Map<String, Locale> _locales = new HashMap<String, Locale>();
241 
242 }