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