org.argeo.cms/src/org/argeo/cms/LocaleUtils.java

   1 package org.argeo.cms;
   2
   3 import java.security.AccessController;
   4 import java.util.ArrayList;
   5 import java.util.List;
   6 import java.util.Locale;
   7 import java.util.ResourceBundle;
   8
   9 import javax.security.auth.Subject;
  10
  11 import org.argeo.cms.auth.CurrentUser;
  12
  13 /** Utilities simplifying the development of localization enums. */
  14 public class LocaleUtils {
  15         public static String local(Enum<?> en) {
  16                 return local(en, getCurrentLocale(), "/OSGI-INF/l10n/bundle");
  17         }
  18
  19         public static String local(Enum<?> en, Locale locale) {
  20                 return local(en, locale, "/OSGI-INF/l10n/bundle");
  21         }
  22
  23         public static String local(Enum<?> en, Locale locale, String resource) {
  24                 return local(en, locale, resource, en.getClass().getClassLoader());
  25         }
  26
  27         public static String local(Enum<?> en, Locale locale, String resource, ClassLoader classLoader) {
  28                 return local(en.name(), locale, resource, classLoader);
  29         }
  30
  31         public static String local(String key, ClassLoader classLoader) {
  32                 return local(key, getCurrentLocale(), "/OSGI-INF/l10n/bundle", classLoader);
  33         }
  34
  35         public static String local(String key, Locale locale, ClassLoader classLoader) {
  36                 return local(key, locale, "/OSGI-INF/l10n/bundle", classLoader);
  37         }
  38
  39         public static String local(String key, Locale locale, String resource, ClassLoader classLoader) {
  40                 ResourceBundle rb = ResourceBundle.getBundle(resource, locale, classLoader);
  41                 assert key.length() > 2;
  42                 if (isLocaleKey(key))
  43                         key = key.substring(1);
  44                 return rb.getString(key);
  45         }
  46
  47         public static boolean isLocaleKey(String str) {
  48                 if (str.length() > 2 && ('%' == str.charAt(0)))
  49                         return true;
  50                 else
  51                         return false;
  52         }
  53
  54         public static String lead(String raw, Locale locale) {
  55                 return raw.substring(0, 1).toUpperCase(locale) + raw.substring(1);
  56         }
  57
  58         public static String lead(Localized localized) {
  59                 return lead(localized, getCurrentLocale());
  60         }
  61
  62         public static String lead(Localized localized, Locale locale) {
  63                 return lead(localized.local(locale).toString(), locale);
  64         }
  65
  66         static Locale getCurrentLocale() {
  67                 if (Subject.getSubject(AccessController.getContext()) != null)
  68                         return CurrentUser.locale();
  69                 else
  70                         return Locale.getDefault();
  71                 // return UiContext.getLocale();
  72                 // FIXME look into Subject or settings
  73                 // return Locale.getDefault();
  74         }
  75
  76         /** Returns null if argument is null. */
  77         public static List<Locale> asLocaleList(Object locales) {
  78                 if (locales == null)
  79                         return null;
  80                 ArrayList<Locale> availableLocales = new ArrayList<Locale>();
  81                 String[] codes = locales.toString().split(",");
  82                 for (int i = 0; i < codes.length; i++) {
  83                         String code = codes[i];
  84                         // variant not supported
  85                         int indexUnd = code.indexOf("_");
  86                         Locale locale;
  87                         if (indexUnd > 0) {
  88                                 String language = code.substring(0, indexUnd);
  89                                 String country = code.substring(indexUnd + 1);
  90                                 locale = new Locale(language, country);
  91                         } else {
  92                                 locale = new Locale(code);
  93                         }
  94                         availableLocales.add(locale);
  95                 }
  96                 return availableLocales;
  97         }
  98 }