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

   1 package org.argeo.cms;
   2
   3 import java.util.Locale;
   4 import java.util.ResourceBundle;
   5
   6 import org.argeo.api.cms.CmsLog;
   7
   8 /** Utilities simplifying the development of localization enums. */
   9 public class LocaleUtils {
  10         final static String DEFAULT_OSGI_l10N_BUNDLE = "/OSGI-INF/l10n/bundle";
  11
  12         private final static CmsLog log = CmsLog.getLog(LocaleUtils.class);
  13
  14         private final static ThreadLocal<Locale> threadLocale = new ThreadLocal<>();
  15
  16         public static void setThreadLocale(Locale locale) {
  17                 threadLocale.set(locale);
  18         }
  19
  20         public static String local(Localized localized) {
  21                 return local(localized.name(), localized.getClass().getClassLoader());
  22         }
  23
  24         public static String local(Localized localized, Locale locale) {
  25                 if (localized.name() == null) // untranslated
  26                         return localized.local(locale);
  27                 return local(localized.name(), locale, localized.getClass().getClassLoader());
  28         }
  29
  30         @Deprecated
  31         public static String local(Enum<?> en) {
  32                 return local(en, getCurrentLocale(), DEFAULT_OSGI_l10N_BUNDLE);
  33         }
  34
  35         @Deprecated
  36         public static String local(Enum<?> en, Locale locale) {
  37                 return local(en, locale, DEFAULT_OSGI_l10N_BUNDLE);
  38         }
  39
  40         @Deprecated
  41         public static String local(Enum<?> en, Locale locale, String resource) {
  42                 return local(en, locale, resource, en.getClass().getClassLoader());
  43         }
  44
  45         @Deprecated
  46         public static String local(Enum<?> en, Locale locale, String resource, ClassLoader classLoader) {
  47                 return local(en.name(), locale, resource, classLoader);
  48         }
  49
  50         public static String local(String key, ClassLoader classLoader) {
  51                 return local(key, getCurrentLocale(), DEFAULT_OSGI_l10N_BUNDLE, classLoader);
  52         }
  53
  54         public static String local(String key, Locale locale, ClassLoader classLoader) {
  55                 return local(key, locale, DEFAULT_OSGI_l10N_BUNDLE, classLoader);
  56         }
  57
  58         /** Where the search for a message is actually performed. */
  59         public static String local(String key, Locale locale, String resource, ClassLoader classLoader) {
  60                 ResourceBundle rb = ResourceBundle.getBundle(resource, locale, classLoader);
  61                 if (isLocaleKey(key)) {
  62                         assert key.length() > 1;
  63                         key = key.substring(1);
  64                 }
  65                 if (rb.containsKey(key))
  66                         return rb.getString(key);
  67                 else // for simple cases, the key will actually be the English word
  68                         return key;
  69         }
  70
  71         public static boolean isLocaleKey(String str) {
  72                 if (str.length() > 2 && ('%' == str.charAt(0)))
  73                         return true;
  74                 else
  75                         return false;
  76         }
  77
  78         /** Lead transformation on the translated string. */
  79         public static String toLead(String raw, Locale locale) {
  80                 if ("".equals(raw))
  81                         return "";
  82                 return raw.substring(0, 1).toUpperCase(locale) + raw.substring(1);
  83         }
  84
  85         public static String lead(Localized localized, ClassLoader classLoader) {
  86                 Locale locale = getCurrentLocale();
  87                 if (localized.name() == null)// untranslated
  88                         return toLead(localized.local(locale), locale);
  89                 return toLead(local(localized.name(), getCurrentLocale(), DEFAULT_OSGI_l10N_BUNDLE, classLoader), locale);
  90         }
  91
  92         public static String lead(Localized localized) {
  93                 return lead(localized, localized.getL10nClassLoader());
  94         }
  95
  96         public static String lead(Localized localized, Locale locale) {
  97                 return toLead(local(localized, locale), locale);
  98         }
  99
 100         static Locale getCurrentLocale() {
 101                 Locale currentLocale = null;
 102                 if (CurrentUser.isAvailable())
 103                         currentLocale = CurrentUser.locale();
 104                 else if (threadLocale.get() != null) {
 105                         currentLocale = threadLocale.get();
 106                 }
 107                 if (log.isTraceEnabled())
 108                         log.trace("Thread #" + Thread.currentThread().getId() + " " + Thread.currentThread().getName() + " locale: "
 109                                         + currentLocale);
 110                 if (currentLocale == null)
 111                         throw new IllegalStateException("No locale found");
 112                 return currentLocale;
 113                 // return UiContext.getLocale();
 114                 // FIXME look into Subject or settings
 115                 // return Locale.getDefault();
 116         }
 117
 118 }