src/share/classes/sun/util/locale/provider/LocaleProviderAdapter.java

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rev 5856 : [mq]: 7196799


  42 import java.util.spi.LocaleNameProvider;
  43 import java.util.spi.LocaleServiceProvider;
  44 import java.util.spi.TimeZoneNameProvider;
  45 import sun.util.cldr.CLDRLocaleProviderAdapter;
  46 import sun.util.resources.LocaleData;
  47 
  48 /**
  49  * The LocaleProviderAdapter abstract class.
  50  *
  51  * @author Naoto Sato
  52  * @author Masayoshi Okutsu
  53  */
  54 public abstract class LocaleProviderAdapter {
  55     /**
  56      * Adapter type.
  57      */
  58     public static enum Type {
  59         JRE("sun.util.resources", "sun.text.resources"),
  60         CLDR("sun.util.resources.cldr", "sun.text.resources.cldr"),
  61         SPI,
  62         HOST;

  63 
  64         private final String UTIL_RESOURCES_PACKAGE;
  65         private final String TEXT_RESOURCES_PACKAGE;
  66 
  67         private Type() {
  68             this(null, null);
  69         }
  70 
  71         private Type(String util, String text) {
  72             UTIL_RESOURCES_PACKAGE = util;
  73             TEXT_RESOURCES_PACKAGE = text;
  74         }
  75 
  76         public String getUtilResourcesPackage() {
  77             return UTIL_RESOURCES_PACKAGE;
  78         }
  79 
  80         public String getTextResourcesPackage() {
  81             return TEXT_RESOURCES_PACKAGE;
  82         }


  94     /**
  95      * JRE Locale Data Adapter instance
  96      */
  97     private static LocaleProviderAdapter jreLocaleProviderAdapter = new JRELocaleProviderAdapter();
  98 
  99     /**
 100      * SPI Locale Data Adapter instance
 101      */
 102     private static LocaleProviderAdapter spiLocaleProviderAdapter = new SPILocaleProviderAdapter();
 103 
 104     /**
 105      * CLDR Locale Data Adapter instance, if any.
 106      */
 107     private static LocaleProviderAdapter cldrLocaleProviderAdapter = null;
 108 
 109     /**
 110      * HOST Locale Data Adapter instance, if any.
 111      */
 112     private static LocaleProviderAdapter hostLocaleProviderAdapter = null;
 113 






 114     static {
 115         String order = AccessController.doPrivileged(
 116                            new sun.security.action.GetPropertyAction("java.locale.providers"));
 117                     // Override adapterPreference with the properties one
 118                     if (order != null && order.length() != 0) {
 119                         String[] types = order.split(",");
 120                         List<Type> typeList = new ArrayList<>();
 121                         for (String type : types) {
 122                             try {
 123                             Type aType = Type.valueOf(type.trim().toUpperCase(Locale.ROOT));
 124 
 125                                 // load adapter if necessary
 126                                 switch (aType) {
 127                                 case CLDR:
 128                         cldrLocaleProviderAdapter = new CLDRLocaleProviderAdapter();
 129                                     break;
 130                                 case HOST:
 131                         hostLocaleProviderAdapter = new HostLocaleProviderAdapter();
 132                                     break;
 133                                 }
 134                                 typeList.add(aType);
 135                 } catch (// could be caused by the user specifying wrong

 136                                      // provider name or format in the system property
 137                                      IllegalArgumentException |
 138                                      UnsupportedOperationException e) {
 139                                 LocaleServiceProviderPool.config(LocaleProviderAdapter.class, e.toString());
 140                             }
 141                         }
 142 
 143                         if (!typeList.contains(Type.JRE)) {
 144                             // Append JRE as the last resort.
 145                             typeList.add(Type.JRE);

 146                         }
 147                         adapterPreference = typeList.toArray(new Type[0]);
 148                     }
 149     }
 150 
 151 
 152     /**
 153      * Returns the singleton instance for each adapter type
 154      */
 155     public static LocaleProviderAdapter forType(Type type) {
 156         switch (type) {
 157         case JRE:
 158             return jreLocaleProviderAdapter;
 159         case CLDR:
 160             return cldrLocaleProviderAdapter;
 161         case SPI:
 162             return spiLocaleProviderAdapter;
 163         case HOST:
 164             return hostLocaleProviderAdapter;


 165         default:
 166             throw new InternalError("unknown locale data adapter type");
 167         }
 168     }
 169 
 170     public static LocaleProviderAdapter forJRE() {
 171         return jreLocaleProviderAdapter;
 172     }
 173 
 174     public static LocaleProviderAdapter getResourceBundleBased() {
 175         for (Type type : getAdapterPreference()) {
 176             if (type == Type.JRE || type == Type.CLDR) {
 177                 return forType(type);
 178             }
 179         }
 180         // Shouldn't happen.
 181         throw new InternalError();
 182     }
 183     /**
 184      * Returns the preference order of LocaleProviderAdapter.Type
 185      */
 186     public static Type[] getAdapterPreference() {
 187         return adapterPreference;
 188     }
 189 
 190     /**
 191      * Returns a LocaleProviderAdapter for the given locale service provider that
 192      * best matches the given locale. This method returns the LocaleProviderAdapter
 193      * for JRE if none is found for the given locale.
 194      *
 195      * @param providerClass the class for the locale service provider
 196      * @param locale the desired locale.


 201         // Fast look-up for the given locale
 202         LocaleProviderAdapter adapter = findAdapter(providerClass, locale);
 203         if (adapter != null) {
 204             return adapter;
 205         }
 206 
 207         // Try finding an adapter in the normal candidate locales path of the given locale.
 208         List<Locale> lookupLocales = ResourceBundle.Control.getControl(ResourceBundle.Control.FORMAT_DEFAULT)
 209                                         .getCandidateLocales("", locale);
 210         for (Locale loc : lookupLocales) {
 211             if (loc.equals(locale)) {
 212                 // We've already done with this loc.
 213                 continue;
 214             }
 215             adapter = findAdapter(providerClass, loc);
 216             if (adapter != null) {
 217                 return adapter;
 218             }
 219         }
 220 
 221         // returns the adapter for JRE as the last resort
 222         return jreLocaleProviderAdapter;

 223     }


 224 
 225     private static LocaleProviderAdapter findAdapter(Class<? extends LocaleServiceProvider> providerClass,
 226                                                  Locale locale) {
 227         for (Type type : getAdapterPreference()) {
 228             LocaleProviderAdapter adapter = forType(type);
 229             LocaleServiceProvider provider = adapter.getLocaleServiceProvider(providerClass);
 230             if (provider != null) {
 231                 if (provider.isSupportedLocale(locale)) {
 232                     return adapter;
 233                 }
 234             }
 235         }
 236         return null;
 237     }
 238 
 239     /**
 240      * A utility method for implementing the default LocaleServiceProvider.isSupportedLocale
 241      * for the JRE and CLDR adapters.
 242      */
 243     static boolean isSupportedLocale(Locale locale, LocaleProviderAdapter.Type type, Set<String> langtags) {
 244         assert type == Type.JRE || type == Type.CLDR;
 245         if (locale == Locale.ROOT) {
 246             return true;
 247         }






 248         locale = locale.stripExtensions();
 249         if (langtags.contains(locale.toLanguageTag())) {
 250             return true;
 251         }
 252         if (type == LocaleProviderAdapter.Type.JRE) {
 253             String oldname = locale.toString().replace('_', '-');
 254             return langtags.contains(oldname);
 255         }
 256         return false;
 257     }
 258 
 259     public static Locale[] toLocaleArray(Set<String> tags) {
 260         Locale[] locs = new Locale[tags.size() + 1];
 261         int index = 0;
 262         locs[index++] = Locale.ROOT;
 263         for (String tag : tags) {
 264             switch (tag) {
 265             case "ja-JP-JP":
 266                 locs[index++] = JRELocaleConstants.JA_JP_JP;
 267                 break;
 268             case "th-TH-TH":
 269                 locs[index++] = JRELocaleConstants.TH_TH_TH;
 270                 break;
 271             default:
 272                 locs[index++] = Locale.forLanguageTag(tag);




  42 import java.util.spi.LocaleNameProvider;
  43 import java.util.spi.LocaleServiceProvider;
  44 import java.util.spi.TimeZoneNameProvider;
  45 import sun.util.cldr.CLDRLocaleProviderAdapter;
  46 import sun.util.resources.LocaleData;
  47 
  48 /**
  49  * The LocaleProviderAdapter abstract class.
  50  *
  51  * @author Naoto Sato
  52  * @author Masayoshi Okutsu
  53  */
  54 public abstract class LocaleProviderAdapter {
  55     /**
  56      * Adapter type.
  57      */
  58     public static enum Type {
  59         JRE("sun.util.resources", "sun.text.resources"),
  60         CLDR("sun.util.resources.cldr", "sun.text.resources.cldr"),
  61         SPI,
  62         HOST,
  63         FALLBACK("sun.util.resources", "sun.text.resources");
  64 
  65         private final String UTIL_RESOURCES_PACKAGE;
  66         private final String TEXT_RESOURCES_PACKAGE;
  67 
  68         private Type() {
  69             this(null, null);
  70         }
  71 
  72         private Type(String util, String text) {
  73             UTIL_RESOURCES_PACKAGE = util;
  74             TEXT_RESOURCES_PACKAGE = text;
  75         }
  76 
  77         public String getUtilResourcesPackage() {
  78             return UTIL_RESOURCES_PACKAGE;
  79         }
  80 
  81         public String getTextResourcesPackage() {
  82             return TEXT_RESOURCES_PACKAGE;
  83         }


  95     /**
  96      * JRE Locale Data Adapter instance
  97      */
  98     private static LocaleProviderAdapter jreLocaleProviderAdapter = new JRELocaleProviderAdapter();
  99 
 100     /**
 101      * SPI Locale Data Adapter instance
 102      */
 103     private static LocaleProviderAdapter spiLocaleProviderAdapter = new SPILocaleProviderAdapter();
 104 
 105     /**
 106      * CLDR Locale Data Adapter instance, if any.
 107      */
 108     private static LocaleProviderAdapter cldrLocaleProviderAdapter = null;
 109 
 110     /**
 111      * HOST Locale Data Adapter instance, if any.
 112      */
 113     private static LocaleProviderAdapter hostLocaleProviderAdapter = null;
 114 
 115     /**
 116      * FALLBACK Locale Data Adapter instance. It's basically the same with JRE, but only kicks
 117      * in for the root locale.
 118      */
 119     private static LocaleProviderAdapter fallbackLocaleProviderAdapter = null;
 120 
 121     static {
 122         String order = AccessController.doPrivileged(
 123                            new sun.security.action.GetPropertyAction("java.locale.providers"));
 124         // Override adapterPreference with the properties one
 125         if (order != null && order.length() != 0) {
 126             String[] types = order.split(",");
 127             List<Type> typeList = new ArrayList<>();
 128             for (String type : types) {
 129                 try {
 130                     Type aType = Type.valueOf(type.trim().toUpperCase(Locale.ROOT));
 131 
 132                     // load adapter if necessary
 133                     switch (aType) {
 134                         case CLDR:
 135                             cldrLocaleProviderAdapter = new CLDRLocaleProviderAdapter();
 136                             break;
 137                         case HOST:
 138                             hostLocaleProviderAdapter = new HostLocaleProviderAdapter();
 139                             break;
 140                     }
 141                     typeList.add(aType);
 142                 } catch (IllegalArgumentException | UnsupportedOperationException e) {
 143                     // could be caused by the user specifying wrong
 144                     // provider name or format in the system property


 145                     LocaleServiceProviderPool.config(LocaleProviderAdapter.class, e.toString());
 146                 }
 147             }
 148 
 149             if (!typeList.contains(Type.JRE)) {
 150                 // Append FALLBACK as the last resort.
 151                 fallbackLocaleProviderAdapter = new FallbackLocaleProviderAdapter();
 152                 typeList.add(Type.FALLBACK);
 153             }
 154             adapterPreference = typeList.toArray(new Type[0]);
 155         }
 156     }
 157 
 158 
 159     /**
 160      * Returns the singleton instance for each adapter type
 161      */
 162     public static LocaleProviderAdapter forType(Type type) {
 163         switch (type) {
 164         case JRE:
 165             return jreLocaleProviderAdapter;
 166         case CLDR:
 167             return cldrLocaleProviderAdapter;
 168         case SPI:
 169             return spiLocaleProviderAdapter;
 170         case HOST:
 171             return hostLocaleProviderAdapter;
 172         case FALLBACK:
 173             return fallbackLocaleProviderAdapter;
 174         default:
 175             throw new InternalError("unknown locale data adapter type");
 176         }
 177     }
 178 
 179     public static LocaleProviderAdapter forJRE() {
 180         return jreLocaleProviderAdapter;
 181     }
 182 
 183     public static LocaleProviderAdapter getResourceBundleBased() {
 184         for (Type type : getAdapterPreference()) {
 185             if (type == Type.JRE || type == Type.CLDR || type == Type.FALLBACK) {
 186                 return forType(type);
 187             }
 188         }
 189         // Shouldn't happen.
 190         throw new InternalError();
 191     }
 192     /**
 193      * Returns the preference order of LocaleProviderAdapter.Type
 194      */
 195     public static Type[] getAdapterPreference() {
 196         return adapterPreference;
 197     }
 198 
 199     /**
 200      * Returns a LocaleProviderAdapter for the given locale service provider that
 201      * best matches the given locale. This method returns the LocaleProviderAdapter
 202      * for JRE if none is found for the given locale.
 203      *
 204      * @param providerClass the class for the locale service provider
 205      * @param locale the desired locale.


 210         // Fast look-up for the given locale
 211         LocaleProviderAdapter adapter = findAdapter(providerClass, locale);
 212         if (adapter != null) {
 213             return adapter;
 214         }
 215 
 216         // Try finding an adapter in the normal candidate locales path of the given locale.
 217         List<Locale> lookupLocales = ResourceBundle.Control.getControl(ResourceBundle.Control.FORMAT_DEFAULT)
 218                                         .getCandidateLocales("", locale);
 219         for (Locale loc : lookupLocales) {
 220             if (loc.equals(locale)) {
 221                 // We've already done with this loc.
 222                 continue;
 223             }
 224             adapter = findAdapter(providerClass, loc);
 225             if (adapter != null) {
 226                 return adapter;
 227             }
 228         }
 229 
 230         // returns the adapter for FALLBACK as the last resort
 231         if (fallbackLocaleProviderAdapter == null) {
 232             fallbackLocaleProviderAdapter = new FallbackLocaleProviderAdapter();
 233         }
 234         return fallbackLocaleProviderAdapter;
 235     }
 236 
 237     private static LocaleProviderAdapter findAdapter(Class<? extends LocaleServiceProvider> providerClass,
 238                                                  Locale locale) {
 239         for (Type type : getAdapterPreference()) {
 240             LocaleProviderAdapter adapter = forType(type);
 241             LocaleServiceProvider provider = adapter.getLocaleServiceProvider(providerClass);
 242             if (provider != null) {
 243                 if (provider.isSupportedLocale(locale)) {
 244                     return adapter;
 245                 }
 246             }
 247         }
 248         return null;
 249     }
 250 
 251     /**
 252      * A utility method for implementing the default LocaleServiceProvider.isSupportedLocale
 253      * for the JRE, CLDR, and FALLBACK adapters.
 254      */
 255     static boolean isSupportedLocale(Locale locale, LocaleProviderAdapter.Type type, Set<String> langtags) {
 256         assert type == Type.JRE || type == Type.CLDR || type == Type.FALLBACK;
 257         if (locale == Locale.ROOT) {
 258             return true;
 259         }
 260 
 261         if (type == Type.FALLBACK) {
 262             // no other locales except ROOT are supported for FALLBACK
 263             return false;
 264         }
 265 
 266         locale = locale.stripExtensions();
 267         if (langtags.contains(locale.toLanguageTag())) {
 268             return true;
 269         }
 270         if (type == Type.JRE) {
 271             String oldname = locale.toString().replace('_', '-');
 272             return langtags.contains(oldname);
 273         }
 274         return false;
 275     }
 276 
 277     public static Locale[] toLocaleArray(Set<String> tags) {
 278         Locale[] locs = new Locale[tags.size() + 1];
 279         int index = 0;
 280         locs[index++] = Locale.ROOT;
 281         for (String tag : tags) {
 282             switch (tag) {
 283             case "ja-JP-JP":
 284                 locs[index++] = JRELocaleConstants.JA_JP_JP;
 285                 break;
 286             case "th-TH-TH":
 287                 locs[index++] = JRELocaleConstants.TH_TH_TH;
 288                 break;
 289             default:
 290                 locs[index++] = Locale.forLanguageTag(tag);