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8287340: Refactor old code using StringTokenizer in locale related code

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Reviewed-by: iris, joehw
This commit is contained in:
Naoto Sato 2022-06-02 18:35:20 +00:00
parent ccec5d1e85
commit 26d24263c7
4 changed files with 115 additions and 171 deletions
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48
src/java.base/share/classes/sun/util/cldr/CLDRLocaleProviderAdapter.java
View file

@ -33,14 +33,12 @@ import java.text.spi.BreakIteratorProvider;
import java.text.spi.CollatorProvider;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Optional;
import java.util.ServiceLoader;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.concurrent.ConcurrentHashMap;
import java.util.spi.CalendarDataProvider;
import java.util.spi.CalendarNameProvider;
@ -63,13 +61,13 @@ public class CLDRLocaleProviderAdapter extends JRELocaleProviderAdapter {
// parent locales map
private static volatile Map<Locale, Locale> parentLocalesMap;
// language aliases map
private static volatile Map<String,String> langAliasesMap;
// cache to hold locale to locale mapping for language aliases.
private static final Map<Locale, Locale> langAliasesCache;
// cache the available locales
private static volatile Locale[] AVAILABLE_LOCALES;
static {
parentLocalesMap = new ConcurrentHashMap<>();
langAliasesMap = new ConcurrentHashMap<>();
langAliasesCache = new ConcurrentHashMap<>();
// Assuming these locales do NOT have irregular parent locales.
parentLocalesMap.put(Locale.ROOT, Locale.ROOT);
@ -175,29 +173,19 @@ public class CLDRLocaleProviderAdapter extends JRELocaleProviderAdapter {
@Override
public Locale[] getAvailableLocales() {
Set<String> all = createLanguageTagSet("AvailableLocales");
Locale[] locs = new Locale[all.size()];
int index = 0;
for (String tag : all) {
locs[index++] = Locale.forLanguageTag(tag);
if (AVAILABLE_LOCALES == null) {
AVAILABLE_LOCALES = createLanguageTagSet("AvailableLocales").stream()
.map(Locale::forLanguageTag)
.toArray(Locale[]::new);
}
return locs;
return AVAILABLE_LOCALES;
}
private static Locale applyAliases(Locale loc) {
if (langAliasesMap.isEmpty()) {
langAliasesMap = baseMetaInfo.getLanguageAliasMap();
}
Locale locale = langAliasesCache.get(loc);
if (locale == null) {
String locTag = loc.toLanguageTag();
Locale aliasLocale = langAliasesMap.containsKey(locTag)
? Locale.forLanguageTag(langAliasesMap.get(locTag)) : loc;
langAliasesCache.putIfAbsent(loc, aliasLocale);
return aliasLocale;
} else {
return locale;
}
return langAliasesCache.computeIfAbsent(loc, l -> {
var alias = baseMetaInfo.getLanguageAliasMap().get(l.toLanguageTag());
return alias != null ? Locale.forLanguageTag(alias) : l;
});
}
@Override
@ -220,15 +208,9 @@ public class CLDRLocaleProviderAdapter extends JRELocaleProviderAdapter {
supportedLocaleString = nonBaseTags;
}
}
if (supportedLocaleString == null) {
return Collections.emptySet();
}
StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
Set<String> tagset = new HashSet<>((tokens.countTokens() * 4 + 2) / 3);
while (tokens.hasMoreTokens()) {
tagset.add(tokens.nextToken());
}
return tagset;
return supportedLocaleString != null ?
Set.of(supportedLocaleString.split("\s+")) :
Collections.emptySet();
}
// Implementation of ResourceBundleBasedAdapter

53
src/java.base/share/classes/sun/util/locale/provider/JRELocaleProviderAdapter.java
View file

@ -26,7 +26,6 @@
package sun.util.locale.provider;
import java.security.AccessController;
import java.security.AccessControlException;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
@ -36,15 +35,13 @@ import java.text.spi.DateFormatProvider;
import java.text.spi.DateFormatSymbolsProvider;
import java.text.spi.DecimalFormatSymbolsProvider;
import java.text.spi.NumberFormatProvider;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.ServiceLoader;
import java.util.ServiceConfigurationError;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.spi.CalendarDataProvider;
@ -437,7 +434,7 @@ public class JRELocaleProviderAdapter extends LocaleProviderAdapter implements R
*/
@Override
public Locale[] getAvailableLocales() {
return AvailableJRELocales.localeList.clone();
return AvailableJRELocales.localeList;
}
public Set<String> getLanguageTagSet(String category) {
@ -454,16 +451,9 @@ public class JRELocaleProviderAdapter extends LocaleProviderAdapter implements R
protected Set<String> createLanguageTagSet(String category) {
String supportedLocaleString = createSupportedLocaleString(category);
if (supportedLocaleString == null) {
return Collections.emptySet();
}
StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
Set<String> tagset = new HashSet<>((tokens.countTokens() * 4 + 2) / 3);
while (tokens.hasMoreTokens()) {
tagset.add(tokens.nextToken());
}
return tagset;
return supportedLocaleString != null ?
Set.of(supportedLocaleString.split("\s+")) :
Collections.emptySet();
}
private static String createSupportedLocaleString(String category) {
@ -520,28 +510,17 @@ public class JRELocaleProviderAdapter extends LocaleProviderAdapter implements R
throw new InternalError("No available locales for JRE");
}
StringTokenizer localeStringTokenizer = new StringTokenizer(supportedLocaleString);
int length = localeStringTokenizer.countTokens();
Locale[] locales = new Locale[length + 1];
locales[0] = Locale.ROOT;
for (int i = 1; i <= length; i++) {
String currentToken = localeStringTokenizer.nextToken();
switch (currentToken) {
case "ja-JP-JP":
locales[i] = JRELocaleConstants.JA_JP_JP;
break;
case "no-NO-NY":
locales[i] = JRELocaleConstants.NO_NO_NY;
break;
case "th-TH-TH":
locales[i] = JRELocaleConstants.TH_TH_TH;
break;
default:
locales[i] = Locale.forLanguageTag(currentToken);
}
}
return locales;
return Arrays.stream(supportedLocaleString.split("\s+"))
.map(t -> {
return switch (t) {
case "ja-JP-JP" -> JRELocaleConstants.JA_JP_JP;
case "no-NO-NY" -> JRELocaleConstants.NO_NO_NY;
case "th-TH-TH" -> JRELocaleConstants.TH_TH_TH;
default -> Locale.forLanguageTag(t);
};
})
.distinct()
.toArray(Locale[]::new);
}
@Override

30
src/java.base/share/classes/sun/util/locale/provider/LocaleProviderAdapter.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2022, 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
@ -33,6 +33,7 @@ import java.text.spi.DateFormatSymbolsProvider;
import java.text.spi.DecimalFormatSymbolsProvider;
import java.text.spi.NumberFormatProvider;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
@ -308,23 +309,16 @@ public abstract class LocaleProviderAdapter {
}
public static Locale[] toLocaleArray(Set<String> tags) {
Locale[] locs = new Locale[tags.size() + 1];
int index = 0;
locs[index++] = Locale.ROOT;
for (String tag : tags) {
switch (tag) {
case "ja-JP-JP":
locs[index++] = JRELocaleConstants.JA_JP_JP;
break;
case "th-TH-TH":
locs[index++] = JRELocaleConstants.TH_TH_TH;
break;
default:
locs[index++] = Locale.forLanguageTag(tag);
break;
}
}
return locs;
return tags.stream()
.map(t -> {
return switch (t) {
case "ja-JP-JP" -> JRELocaleConstants.JA_JP_JP;
case "no-NO-NY" -> JRELocaleConstants.NO_NO_NY;
case "th-TH-TH" -> JRELocaleConstants.TH_TH_TH;
default -> Locale.forLanguageTag(t);
};
})
.toArray(Locale[]::new);
}
/**