src/java.base/share/classes/sun/util/locale/provider/DateFormatProviderImpl.java

rev 10528 : 8038436: Re-examine the mechanism to determine available localedata and cldrdata
Reviewed-by:

*** 1,7 ****
  /*
!  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 40,54 ****
   * @author Naoto Sato
   * @author Masayoshi Okutsu
   */
  public class DateFormatProviderImpl extends DateFormatProvider implements AvailableLanguageTags {
      private final LocaleProviderAdapter.Type type;
!     private final Set<String> langtags;
  
!     public DateFormatProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
          this.type = type;
-         this.langtags = langtags;
      }
  
      /**
       * Returns an array of all locales for which this locale service provider
       * can provide localized objects or names.
--- 40,53 ----
   * @author Naoto Sato
   * @author Masayoshi Okutsu
   */
  public class DateFormatProviderImpl extends DateFormatProvider implements AvailableLanguageTags {
      private final LocaleProviderAdapter.Type type;
!     private static Set<String> langtags;
  
!     public DateFormatProviderImpl(LocaleProviderAdapter.Type type) {
          this.type = type;
      }
  
      /**
       * Returns an array of all locales for which this locale service provider
       * can provide localized objects or names.
*** 56,71 ****
       * @return An array of all locales for which this locale service provider
       * can provide localized objects or names.
       */
      @Override
      public Locale[] getAvailableLocales() {
!         return LocaleProviderAdapter.toLocaleArray(langtags);
      }
  
      @Override
      public boolean isSupportedLocale(Locale locale) {
!         return LocaleProviderAdapter.isSupportedLocale(locale, type, langtags);
      }
  
      /**
       * Returns a new <code>DateFormat</code> instance which formats time
       * with the given formatting style for the specified locale.
--- 55,70 ----
       * @return An array of all locales for which this locale service provider
       * can provide localized objects or names.
       */
      @Override
      public Locale[] getAvailableLocales() {
!         return LocaleProviderAdapter.toLocaleArray(getLangTags(type));
      }
  
      @Override
      public boolean isSupportedLocale(Locale locale) {
!         return LocaleProviderAdapter.isSupportedLocale(locale, type, getLangTags(type));
      }
  
      /**
       * Returns a new <code>DateFormat</code> instance which formats time
       * with the given formatting style for the specified locale.
*** 162,169 ****
--- 161,179 ----
          return sdf;
      }
  
      @Override
      public Set<String> getAvailableLanguageTags() {
+         return getLangTags(type);
+     }
+ 
+     /**
+      * Available language tags for FormatData resources. Shared with other "format"
+      * provider implementations.
+      * */
+     static Set<String> getLangTags(LocaleProviderAdapter.Type t) {
+         if (langtags == null) {
+             langtags = ((JRELocaleProviderAdapter)LocaleProviderAdapter.forType(t)).getLanguageTagSet("FormatData");
+         }
          return langtags;
      }
  }