src/java.base/share/classes/sun/util/cldr/CLDRLocaleProviderAdapter.java

rev 47480 : [mq]: 8176841

@@ -35,19 +35,19 @@
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
-import java.util.Objects;
+import java.util.Optional;
 import java.util.ServiceLoader;
 import java.util.ServiceConfigurationError;
 import java.util.Set;
 import java.util.StringTokenizer;
 import java.util.concurrent.ConcurrentHashMap;
 import sun.util.locale.provider.JRELocaleProviderAdapter;
-import sun.util.locale.provider.LocaleProviderAdapter;
 import sun.util.locale.provider.LocaleDataMetaInfo;
+import sun.util.locale.provider.LocaleProviderAdapter;
 
 /**
  * LocaleProviderAdapter implementation for the CLDR locale data.
  *
  * @author Masayoshi Okutsu

@@ -121,10 +121,14 @@
         return locs;
     }
 
     @Override
     protected Set<String> createLanguageTagSet(String category) {
+        // Assume all categories support the same set as AvailableLocales
+        // in CLDR adapter.
+        category = "AvailableLocales";
+
         // Directly call Base tags, as we know it's in the base module.
         String supportedLocaleString = baseMetaInfo.availableLanguageTags(category);
         String nonBaseTags = null;
 
         if (nonBaseMetaInfo != null) {

@@ -218,6 +222,13 @@
     public boolean isSupportedProviderLocale(Locale locale, Set<String> langtags) {
         return Locale.ROOT.equals(locale)
                 || langtags.contains(locale.stripExtensions().toLanguageTag())
                 || langtags.contains(getEquivalentLoc(locale).toLanguageTag());
     }
+
+    /**
+     * Returns the time zone ID from an LDML's short ID
+     */
+    public Optional<String> getTimeZoneID(String shortID) {
+        return Optional.ofNullable(baseMetaInfo.tzShortIDs().get(shortID));
+    }
 }