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1   /*
2    * Copyright (c) 2009 QOS.ch 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  package ch.qos.cal10n.util;
23  
24  import ch.qos.cal10n.BaseName;
25  import ch.qos.cal10n.Locale;
26  import ch.qos.cal10n.LocaleData;
27  
28  /**
29   * 
30   * @author Ceki Gülcü
31   * 
32   */
33  public class AnnotationExtractor {
34  
35    static public <E extends Enum<?>> String getBaseName(Class<E> enumClass) {
36      BaseName rbnAnnotation = (BaseName) enumClass.getAnnotation(BaseName.class);
37      if (rbnAnnotation == null) {
38        return null;
39      }
40      return rbnAnnotation.value();
41    }
42  
43    static public <E extends Enum<?>> String[] getLocaleNames(Class<E> enumClass) {
44      Locale[] localeDataArray = getLocaleData(enumClass);
45  
46      if (localeDataArray == null) {
47        return null;
48      }
49  
50      String[] names = new String[localeDataArray.length];
51      for (int i = 0; i < localeDataArray.length; i++) {
52        names[i] = localeDataArray[i].value();
53      }
54      return names;
55    }
56  
57    static public <E extends Enum<?>> Locale[] getLocaleData(Class<E> enumClass) {
58      LocaleData localeDataArrayAnnotation = (LocaleData) enumClass
59          .getAnnotation(LocaleData.class);
60      if (localeDataArrayAnnotation == null) {
61        return null;
62      }
63      return localeDataArrayAnnotation.value();
64    }
65  
66    public static String getCharset(Class<?> enumClass,
67        java.util.Locale juLocale) {
68      LocaleData localeDataArrayAnnotation = (LocaleData) enumClass
69          .getAnnotation(LocaleData.class);
70      if (localeDataArrayAnnotation == null) {
71        return "";
72      }
73      
74      String defaultCharset = localeDataArrayAnnotation.defaultCharset();
75      
76      Locale  la = findLocaleAnnotation(juLocale, localeDataArrayAnnotation);
77      String localeCharset = null;
78      if(la != null) {
79        localeCharset = la.charset();
80      }
81      if(!isEmttyString(localeCharset)) {
82        return localeCharset;
83      }
84      
85      return defaultCharset;
86    }
87  
88    static Locale findLocaleAnnotation(java.util.Locale julocale, LocaleData localeDataArrayAnnotation) {
89      Locale[] localeAnnotationArray = localeDataArrayAnnotation.value();
90      if(localeAnnotationArray == null) {
91        return null;
92      }
93      for(Locale la: localeAnnotationArray) {
94        if(la.value().equals(julocale.toString())) {
95          return la;
96        }
97      }
98      
99      return null;
100   }
101   
102   static boolean isEmttyString(String s) {
103     return s == null || s.length() == 0;
104   }
105 }