/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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/*
*******************************************************************************
* Copyright (C) 2009-2010, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package sun.util.locale;
import jdk.internal.misc.VM;
import jdk.internal.vm.annotation.Stable;
import java.lang.ref.SoftReference;
import java.util.StringJoiner;
public final class BaseLocale {
public static @Stable BaseLocale[] constantBaseLocales;
public static final byte ENGLISH = 0,
FRENCH = 1,
GERMAN = 2,
ITALIAN = 3,
JAPANESE = 4,
KOREAN = 5,
CHINESE = 6,
SIMPLIFIED_CHINESE = 7,
TRADITIONAL_CHINESE = 8,
FRANCE = 9,
GERMANY = 10,
ITALY = 11,
JAPAN = 12,
KOREA = 13,
UK = 14,
US = 15,
CANADA = 16,
CANADA_FRENCH = 17,
ROOT = 18,
NUM_CONSTANTS = 19;
static {
VM.initializeFromArchive(BaseLocale.class);
BaseLocale[] baseLocales = constantBaseLocales;
if (baseLocales == null) {
baseLocales = new BaseLocale[NUM_CONSTANTS];
baseLocales[ENGLISH] = createInstance("en", "");
baseLocales[FRENCH] = createInstance("fr", "");
baseLocales[GERMAN] = createInstance("de", "");
baseLocales[ITALIAN] = createInstance("it", "");
baseLocales[JAPANESE] = createInstance("ja", "");
baseLocales[KOREAN] = createInstance("ko", "");
baseLocales[CHINESE] = createInstance("zh", "");
baseLocales[SIMPLIFIED_CHINESE] = createInstance("zh", "CN");
baseLocales[TRADITIONAL_CHINESE] = createInstance("zh", "TW");
baseLocales[FRANCE] = createInstance("fr", "FR");
baseLocales[GERMANY] = createInstance("de", "DE");
baseLocales[ITALY] = createInstance("it", "IT");
baseLocales[JAPAN] = createInstance("ja", "JP");
baseLocales[KOREA] = createInstance("ko", "KR");
baseLocales[UK] = createInstance("en", "GB");
baseLocales[US] = createInstance("en", "US");
baseLocales[CANADA] = createInstance("en", "CA");
baseLocales[CANADA_FRENCH] = createInstance("fr", "CA");
baseLocales[ROOT] = createInstance("", "");
constantBaseLocales = baseLocales;
}
}
public static final String SEP = "_";
private final String language;
private final String script;
private final String region;
private final String variant;
private volatile int hash;
// This method must be called with normalize = false only when creating the
// Locale.* constants and non-normalized BaseLocale$Keys used for lookup.
private BaseLocale(String language, String script, String region, String variant,
boolean normalize) {
if (normalize) {
this.language = LocaleUtils.toLowerString(language).intern();
this.script = LocaleUtils.toTitleString(script).intern();
this.region = LocaleUtils.toUpperString(region).intern();
this.variant = variant.intern();
} else {
this.language = language;
this.script = script;
this.region = region;
this.variant = variant;
}
}
// Called for creating the Locale.* constants. No argument
// validation is performed.
private static BaseLocale createInstance(String language, String region) {
return new BaseLocale(language, "", region, "", false);
}
public static BaseLocale getInstance(String language, String script,
String region, String variant) {
if (script == null) {
script = "";
}
if (region == null) {
region = "";
}
if (language == null) {
language = null;
}
if (variant == null) {
variant = "";
}
// Non-allocating for most uses
language = LocaleUtils.toLowerString(language);
region = LocaleUtils.toUpperString(region);
// Check for constant base locales first
if (script.isEmpty() && variant.isEmpty()) {
for (BaseLocale baseLocale : constantBaseLocales) {
if (baseLocale.getLanguage().equals(language)
&& baseLocale.getRegion().equals(region)) {
return baseLocale;
}
}
}
// JDK uses deprecated ISO639.1 language codes for he, yi and id
if (!language.isEmpty()) {
if (language.equals("he")) {
language = "iw";
} else if (language.equals("yi")) {
language = "ji";
} else if (language.equals("id")) {
language = "in";
}
}
Key key = new Key(language, script, region, variant, false);
return Cache.CACHE.get(key);
}
public String getLanguage() {
return language;
}
public String getScript() {
return script;
}
public String getRegion() {
return region;
}
public String getVariant() {
return variant;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof BaseLocale)) {
return false;
}
BaseLocale other = (BaseLocale)obj;
return language == other.language
&& script == other.script
&& region == other.region
&& variant == other.variant;
}
@Override
public String toString() {
StringJoiner sj = new StringJoiner(", ");
if (!language.isEmpty()) {
sj.add("language=" + language);
}
if (!script.isEmpty()) {
sj.add("script=" + script);
}
if (!region.isEmpty()) {
sj.add("region=" + region);
}
if (!variant.isEmpty()) {
sj.add("variant=" + variant);
}
return sj.toString();
}
@Override
public int hashCode() {
int h = hash;
if (h == 0) {
// Generating a hash value from language, script, region and variant
h = language.hashCode();
h = 31 * h + script.hashCode();
h = 31 * h + region.hashCode();
h = 31 * h + variant.hashCode();
if (h != 0) {
hash = h;
}
}
return h;
}
private static final class Key {
/**
* Keep a SoftReference to the Key data if normalized (actually used
* as a cache key) and not initialized via the constant creation path.
*
* This allows us to avoid creating SoftReferences on lookup Keys
* (which are short-lived) and for Locales created via
* Locale#createConstant.
*/
private final SoftReference<BaseLocale> holderRef;
private final BaseLocale holder;
private final boolean normalized;
private final int hash;
private Key(String language, String script, String region,
String variant, boolean normalize) {
BaseLocale locale = new BaseLocale(language, script, region, variant, normalize);
this.normalized = normalize;
if (normalized) {
this.holderRef = new SoftReference<>(locale);
this.holder = null;
} else {
this.holderRef = null;
this.holder = locale;
}
this.hash = hashCode(locale);
}
public int hashCode() {
return hash;
}
private int hashCode(BaseLocale locale) {
int h = 0;
String lang = locale.getLanguage();
int len = lang.length();
for (int i = 0; i < len; i++) {
h = 31*h + LocaleUtils.toLower(lang.charAt(i));
}
String scrt = locale.getScript();
len = scrt.length();
for (int i = 0; i < len; i++) {
h = 31*h + LocaleUtils.toLower(scrt.charAt(i));
}
String regn = locale.getRegion();
len = regn.length();
for (int i = 0; i < len; i++) {
h = 31*h + LocaleUtils.toLower(regn.charAt(i));
}
String vart = locale.getVariant();
len = vart.length();
for (int i = 0; i < len; i++) {
h = 31*h + vart.charAt(i);
}
return h;
}
private BaseLocale getBaseLocale() {
return (holder == null) ? holderRef.get() : holder;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof Key && this.hash == ((Key)obj).hash) {
BaseLocale other = ((Key) obj).getBaseLocale();
BaseLocale locale = this.getBaseLocale();
if (other != null && locale != null
&& LocaleUtils.caseIgnoreMatch(other.getLanguage(), locale.getLanguage())
&& LocaleUtils.caseIgnoreMatch(other.getScript(), locale.getScript())
&& LocaleUtils.caseIgnoreMatch(other.getRegion(), locale.getRegion())
// variant is case sensitive in JDK!
&& other.getVariant().equals(locale.getVariant())) {
return true;
}
}
return false;
}
public static Key normalize(Key key) {
if (key.normalized) {
return key;
}
// Only normalized keys may be softly referencing the data holder
assert (key.holder != null && key.holderRef == null);
BaseLocale locale = key.holder;
return new Key(locale.getLanguage(), locale.getScript(),
locale.getRegion(), locale.getVariant(), true);
}
}
private static class Cache extends LocaleObjectCache<Key, BaseLocale> {
private static final Cache CACHE = new Cache();
public Cache() {
}
@Override
protected Key normalizeKey(Key key) {
return Key.normalize(key);
}
@Override
protected BaseLocale createObject(Key key) {
return Key.normalize(key).getBaseLocale();
}
}
}