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.apache.commons.logging.Log;
  12 import org.apache.commons.logging.LogFactory;
  13 import org.argeo.cms.auth.CurrentUser;
  14
  15 /** Utilities simplifying the development of localization enums. */
  16 public class LocaleUtils {
  17         private final static Log log = LogFactory.getLog(LocaleUtils.class);
  18
  19         private final static ThreadLocal<Locale> threadLocale = new ThreadLocal<>();
  20
  21         public static void setThreadLocale(Locale locale) {
  22                 threadLocale.set(locale);
  23         }
  24
  25         public static String local(Enum<?> en) {
  26                 return local(en, getCurrentLocale(), "/OSGI-INF/l10n/bundle");
  27         }
  28
  29         public static String local(Enum<?> en, Locale locale) {
  30                 return local(en, locale, "/OSGI-INF/l10n/bundle");
  31         }
  32
  33         public static String local(Enum<?> en, Locale locale, String resource) {
  34                 return local(en, locale, resource, en.getClass().getClassLoader());
  35         }
  36
  37         public static String local(Enum<?> en, Locale locale, String resource, ClassLoader classLoader) {
  38                 return local(en.name(), locale, resource, classLoader);
  39         }
  40
  41         public static String local(String key, ClassLoader classLoader) {
  42                 return local(key, getCurrentLocale(), "/OSGI-INF/l10n/bundle", classLoader);
  43         }
  44
  45         public static String local(String key, Locale locale, ClassLoader classLoader) {
  46                 return local(key, locale, "/OSGI-INF/l10n/bundle", classLoader);
  47         }
  48
  49         public static String local(String key, Locale locale, String resource, ClassLoader classLoader) {
  50                 ResourceBundle rb = ResourceBundle.getBundle(resource, locale, classLoader);
  51                 assert key.length() > 2;
  52                 if (isLocaleKey(key))
  53                         key = key.substring(1);
  54                 return rb.getString(key);
  55         }
  56
  57         public static boolean isLocaleKey(String str) {
  58                 if (str.length() > 2 && ('%' == str.charAt(0)))
  59                         return true;
  60                 else
  61                         return false;
  62         }
  63
  64         public static String lead(String raw, Locale locale) {
  65                 return raw.substring(0, 1).toUpperCase(locale) + raw.substring(1);
  66         }
  67
  68         public static String lead(Localized localized) {
  69                 return lead(localized, getCurrentLocale());
  70         }
  71
  72         public static String lead(Localized localized, Locale locale) {
  73                 return lead(localized.local(locale).toString(), locale);
  74         }
  75
  76         static Locale getCurrentLocale() {
  77                 Locale currentLocale = null;
  78                 if (Subject.getSubject(AccessController.getContext()) != null)
  79                         currentLocale = CurrentUser.locale();
  80                 else if (threadLocale.get() != null) {
  81                         currentLocale = threadLocale.get();
  82                 }
  83                 if (log.isTraceEnabled())
  84                         log.trace("Thread #" + Thread.currentThread().getId() + " " + Thread.currentThread().getName() + " locale: "
  85                                         + currentLocale);
  86                 if (currentLocale == null)
  87                         throw new IllegalStateException("No locale found");
  88                 return currentLocale;
  89                 // return UiContext.getLocale();
  90                 // FIXME look into Subject or settings
  91                 // return Locale.getDefault();
  92         }
  93
  94         /** Returns null if argument is null. */
  95         public static List<Locale> asLocaleList(Object locales) {
  96                 if (locales == null)
  97                         return null;
  98                 ArrayList<Locale> availableLocales = new ArrayList<Locale>();
  99                 String[] codes = locales.toString().split(",");
 100                 for (int i = 0; i < codes.length; i++) {
 101                         String code = codes[i];
 102                         // variant not supported
 103                         int indexUnd = code.indexOf("_");
 104                         Locale locale;
 105                         if (indexUnd > 0) {
 106                                 String language = code.substring(0, indexUnd);
 107                                 String country = code.substring(indexUnd + 1);
 108                                 locale = new Locale(language, country);
 109                         } else {
 110                                 locale = new Locale(code);
 111                         }
 112                         availableLocales.add(locale);
 113                 }
 114                 return availableLocales;
 115         }
 116 }