AcceptLanguage


1   /*
2    * Copyright (C) 2006 Alfresco, Inc.
3    *
4    * Licensed under the Mozilla Public License version 1.1
5    * with a permitted attribution clause. You may obtain a
6    * copy of the License at
7    *
8    *   http://www.alfresco.org/legal/license.txt
9    *
10   * Unless required by applicable law or agreed to in writing,
11   * software distributed under the License is distributed on an
12   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific
14   * language governing permissions and limitations under the
15   * License.
16   */
17  
18  package org.alfresco.web.app.servlet;
19  
20  import java.util.Locale  ;
21  import java.util.StringTokenizer  ;
22  
23  /**
24   * Accept Language Class
25   * 
26   * <p>Holds the details of an accepted language from a HTTP Accept-Language header
27   * 
28   * @author gkspencer
29   */
30  class AcceptLanguage
31  {
32      // Language name
33      
34      private String   m_language;
35      
36      // Quality
37      
38      private float m_quality = 1.0f;
39      
40      /**
41       * Class constructor
42       * 
43       * @param lang String
44       * @param quality float
45       */
46      public AcceptLanguage(String   lang, float quality)
47      {
48          // Convert the language to Java format
49          
50          m_language = lang.replace('-', '_');
51          m_quality  = quality;
52      }
53      
54      /**
55       * Return the language
56       * 
57       * @return String
58       */
59      public final String   getLanguage()
60      {
61          return m_language;
62      }
63      
64      /**
65       * Return the quality
66       * 
67       * @return float
68       */
69      public final float getQuality()
70      {
71          return m_quality;
72      }
73      
74      /**
75       * Create a locale for this language
76       * 
77       * @return Locale
78       */
79      public final Locale   createLocale()
80      {
81          return createLocale(getLanguage());
82      }
83      
84      /**
85       * Create a locale for this language
86       * 
87       * @param locName String
88       * @return Locale
89       */
90      public final static Locale   createLocale(String   locName)
91      {
92          Locale   locale = null;
93          
94          StringTokenizer   t = new StringTokenizer  (locName, "_");
95          int tokens = t.countTokens();
96          if (tokens == 1)
97          {
98             locale = new Locale  (locName);
99          }
100         else if (tokens == 2)
101         {
102            locale = new Locale  (t.nextToken(), t.nextToken());
103         }
104         else if (tokens == 3)
105         {
106            locale = new Locale  (t.nextToken(), t.nextToken(), t.nextToken());
107         }
108         
109         return locale;
110     }
111     
112     /**
113      * Return the accept language as a string
114      * 
115      * @return String
116      */
117     public String   toString()
118     {
119         StringBuilder   str = new StringBuilder  ();
120         
121         str.append("[");
122         str.append(getLanguage());
123         str.append(",");
124         str.append(getQuality());
125         str.append("]");
126         
127         return str.toString();
128     }
129 }
130
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