8055088: Optimization for locale resources loading isn't working

Reviewed-by: naoto

make/gensrc/GensrcLocaleDataMetaInfo.gmk

 #
-# Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2015, 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
@@ -34,7 +34,8 @@ LOCALE_FILES := $(shell $(FIND) $(JDK_TOPDIR)/src/share/classes \
     -name "TimeZoneNames_*.java" -o -name "TimeZoneNames_*.properties" -o \
     -name "LocaleNames_*.java" -o -name "LocaleNames_*.properties" -o \
     -name "CurrencyNames_*.java" -o -name "CurrencyNames_*.properties" -o \
-    -name "CalendarData_*.java" -o -name "CalendarData_*.properties")
+    -name "CalendarData_*.java" -o -name "CalendarData_*.properties" -o \
+    -name "BreakIteratorInfo_*.java" -o -name "BreakIteratorRules_*.java")
 
 # Then translate the locale files into for example: FormatData_sv
 LOCALE_RESOURCES := $(sort $(subst .properties,,$(subst .java,,$(notdir $(LOCALE_FILES)))))
@@ -79,6 +80,12 @@ $(eval $(call CaptureLocale,FormatData))
 #sun.text.resources.CollationData
 $(eval $(call CaptureLocale,CollationData))
 
+#sun.text.resources.BreakIteratorInfo
+$(eval $(call CaptureLocale,BreakIteratorInfo))
+
+#sun.text.resources.BreakIteratorRules
+$(eval $(call CaptureLocale,BreakIteratorRules))
+
 #sun.util.resources.TimeZoneNames
 $(eval $(call CaptureLocale,TimeZoneNames))
 

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

 /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2015, 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
@@ -30,6 +30,7 @@ import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.text.spi.BreakIteratorProvider;
 import java.text.spi.CollatorProvider;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Locale;
 import java.util.ResourceBundle;
@@ -103,6 +104,9 @@ public class CLDRLocaleProviderAdapter extends JRELocaleProviderAdapter {
     protected Set<String> createLanguageTagSet(String category) {
         ResourceBundle rb = ResourceBundle.getBundle("sun.util.cldr.CLDRLocaleDataMetaInfo", Locale.ROOT);
         String supportedLocaleString = rb.getString(category);
+        if (supportedLocaleString == null) {
+            return Collections.emptySet();
+        }
         Set<String> tagset = new HashSet<>();
         StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
         while (tokens.hasMoreTokens()) {

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

 /*
- * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2015, 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
@@ -34,6 +34,7 @@ import java.text.spi.DateFormatProvider;
 import java.text.spi.DateFormatSymbolsProvider;
 import java.text.spi.DecimalFormatSymbolsProvider;
 import java.text.spi.NumberFormatProvider;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Locale;
 import java.util.Set;
@@ -356,6 +357,9 @@ public class JRELocaleProviderAdapter extends LocaleProviderAdapter implements R
 
     protected Set<String> createLanguageTagSet(String category) {
         String supportedLocaleString = LocaleDataMetaInfo.getSupportedLocaleString(category);
+        if (supportedLocaleString == null) {
+            return Collections.emptySet();
+        }
         Set<String> tagset = new HashSet<>();
         StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
         while (tokens.hasMoreTokens()) {

src/share/classes/sun/util/locale/provider/LocaleDataMetaInfo-XLocales.java.template

 /*
- * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2015, 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
@@ -57,6 +57,12 @@ public class LocaleDataMetaInfo {
         resourceNameToLocales.put("CollationData",
                                   " #CollationData_ENLocales# | #CollationData_NonENLocales# ");
 
+        resourceNameToLocales.put("BreakIteratorInfo",
+                                  " #BreakIteratorInfo_ENLocales# | #BreakIteratorInfo_NonENLocales# ");
+
+        resourceNameToLocales.put("BreakIteratorRules",
+                                  " #BreakIteratorRules_ENLocales# | #BreakIteratorRules_NonENLocales# ");
+
         resourceNameToLocales.put("TimeZoneNames",
                                   " #TimeZoneNames_ENLocales# | #TimeZoneNames_NonENLocales# ");
 

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

 /*
- * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2015, 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
@@ -295,7 +295,7 @@ public abstract class LocaleProviderAdapter {
      * A utility method for implementing the default LocaleServiceProvider.isSupportedLocale
      * for the JRE, CLDR, and FALLBACK adapters.
      */
-    static boolean isSupportedLocale(Locale locale, LocaleProviderAdapter.Type type, Set<String> langtags) {
+    public static boolean isSupportedLocale(Locale locale, LocaleProviderAdapter.Type type, Set<String> langtags) {
         assert type == Type.JRE || type == Type.CLDR || type == Type.FALLBACK;
         if (Locale.ROOT.equals(locale)) {
             return true;

src/share/classes/sun/util/resources/LocaleData.java

 /*
- * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2015, 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
@@ -48,8 +48,11 @@ import java.util.List;
 import java.util.Locale;
 import java.util.MissingResourceException;
 import java.util.ResourceBundle;
+import java.util.Set;
+import sun.util.locale.provider.JRELocaleProviderAdapter;
 import sun.util.locale.provider.LocaleDataMetaInfo;
 import sun.util.locale.provider.LocaleProviderAdapter;
+import static sun.util.locale.provider.LocaleProviderAdapter.Type.CLDR;
 import static sun.util.locale.provider.LocaleProviderAdapter.Type.JRE;
 
 /**
@@ -204,35 +207,23 @@ public class LocaleData {
         @Override
          public List<Locale> getCandidateLocales(String baseName, Locale locale) {
             List<Locale> candidates = super.getCandidateLocales(baseName, locale);
-            /* Get the locale string list from LocaleDataMetaInfo class. */
-            String localeString = LocaleDataMetaInfo.getSupportedLocaleString(baseName);
-
-            if (localeString != null && localeString.length() != 0) {
-                for (Iterator<Locale> l = candidates.iterator(); l.hasNext();) {
-                    Locale loc = l.next();
-                    String lstr;
-                    if (loc.getScript().length() > 0) {
-                        lstr = loc.toLanguageTag().replace('-', '_');
-                    } else {
-                        lstr = loc.toString();
-                        int idx = lstr.indexOf("_#");
-                        if (idx >= 0) {
-                            lstr = lstr.substring(0, idx);
-                        }
-                    }
-                    /* Every locale string in the locale string list returned from
-                     the above getSupportedLocaleString is enclosed
-                     within two white spaces so that we could check some locale
-                     such as "en".
-                     */
-                    if (lstr.length() != 0 && localeString.indexOf(" " + lstr + " ") == -1) {
-                        l.remove();
+            // Weed out Locales which are known to have no resource bundles
+            int lastDot = baseName.lastIndexOf('.');
+            String category = (lastDot >= 0) ? baseName.substring(lastDot + 1) : baseName;
+            LocaleProviderAdapter.Type type = baseName.contains(DOTCLDR) ? CLDR : JRE;
+            LocaleProviderAdapter adapter = LocaleProviderAdapter.forType(type);
+            Set<String> langtags = ((JRELocaleProviderAdapter)adapter).getLanguageTagSet(category);
+            if (!langtags.isEmpty()) {
+                for (Iterator<Locale> itr = candidates.iterator(); itr.hasNext();) {
+                    if (!LocaleProviderAdapter.isSupportedLocale(itr.next(), type, langtags)) {
+                        itr.remove();
                     }
                 }
             }
+
             // Force fallback to Locale.ENGLISH for CLDR time zone names support
             if (locale.getLanguage() != "en"
-                    && baseName.contains(CLDR) && baseName.endsWith("TimeZoneNames")) {
+                    && type == CLDR && category.equals("TimeZoneNames")) {
                 candidates.add(candidates.size() - 1, Locale.ENGLISH);
             }
             return candidates;
@@ -254,7 +245,7 @@ public class LocaleData {
             return null;
         }
 
-        private static final String CLDR      = ".cldr";
+        private static final String DOTCLDR      = ".cldr";
 
         /**
          * Changes baseName to its per-language package name and
@@ -275,8 +266,8 @@ public class LocaleData {
                     assert JRE.getUtilResourcesPackage().length()
                         == JRE.getTextResourcesPackage().length();
                     int index = JRE.getUtilResourcesPackage().length();
-                    if (baseName.indexOf(CLDR, index) > 0) {
-                        index += CLDR.length();
+                    if (baseName.indexOf(DOTCLDR, index) > 0) {
+                        index += DOTCLDR.length();
                     }
                     newBaseName = baseName.substring(0, index + 1) + lang
                                       + baseName.substring(index);