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With inspiration from other libraries
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
/*
*******************************************************************************
* Copyright (C) 2009-2010, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package com.ibm.icu.impl.locale;
public final class BaseLocale {
private static final boolean JDKIMPL = false;
public static final String SEP = "_";
private static final Cache CACHE = new Cache();
public static final BaseLocale ROOT = BaseLocale.getInstance("", "", "", "");
private String _language = "";
private String _script = "";
private String _region = "";
private String _variant = "";
private transient volatile int _hash = 0;
private BaseLocale(String language, String script, String region, String variant) {
if (language != null) {
_language = AsciiUtil.toLowerString(language).intern();
}
if (script != null) {
_script = AsciiUtil.toTitleString(script).intern();
}
if (region != null) {
_region = AsciiUtil.toUpperString(region).intern();
}
if (variant != null) {
if (JDKIMPL) {
// preserve upper/lower cases
_variant = variant.intern();
} else {
_variant = AsciiUtil.toUpperString(variant).intern();
}
}
}
public static BaseLocale getInstance(String language, String script, String region, String variant) {
if (JDKIMPL) {
// JDK uses deprecated ISO639.1 language codes for he, yi and id
if (AsciiUtil.caseIgnoreMatch(language, "he")) {
language = "iw";
} else if (AsciiUtil.caseIgnoreMatch(language, "yi")) {
language = "ji";
} else if (AsciiUtil.caseIgnoreMatch(language, "id")) {
language = "in";
}
}
Key key = new Key(language, script, region, variant);
BaseLocale baseLocale = CACHE.get(key);
return baseLocale;
}
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 hashCode() == other.hashCode()
&& _language.equals(other._language)
&& _script.equals(other._script)
&& _region.equals(other._region)
&& _variant.equals(other._variant);
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder();
if (_language.length() > 0) {
buf.append("language=");
buf.append(_language);
}
if (_script.length() > 0) {
if (buf.length() > 0) {
buf.append(", ");
}
buf.append("script=");
buf.append(_script);
}
if (_region.length() > 0) {
if (buf.length() > 0) {
buf.append(", ");
}
buf.append("region=");
buf.append(_region);
}
if (_variant.length() > 0) {
if (buf.length() > 0) {
buf.append(", ");
}
buf.append("variant=");
buf.append(_variant);
}
return buf.toString();
}
@Override
public int hashCode() {
int h = _hash;
if (h == 0) {
// Generating a hash value from language, script, region and variant
for (int i = 0; i < _language.length(); i++) {
h = 31*h + _language.charAt(i);
}
for (int i = 0; i < _script.length(); i++) {
h = 31*h + _script.charAt(i);
}
for (int i = 0; i < _region.length(); i++) {
h = 31*h + _region.charAt(i);
}
for (int i = 0; i < _variant.length(); i++) {
h = 31*h + _variant.charAt(i);
}
_hash = h;
}
return h;
}
private static class Key implements Comparable {
private String _lang = "";
private String _scrt = "";
private String _regn = "";
private String _vart = "";
private volatile int _hash; // Default to 0
public Key(String language, String script, String region, String variant) {
if (language != null) {
_lang = language;
}
if (script != null) {
_scrt = script;
}
if (region != null) {
_regn = region;
}
if (variant != null) {
_vart = variant;
}
}
@Override
public boolean equals(Object obj) {
if (JDKIMPL) {
return (this == obj) ||
(obj instanceof Key)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._lang, this._lang)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._scrt, this._scrt)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._regn, this._regn)
&& ((Key)obj)._vart.equals(_vart); // variant is case sensitive in JDK!
}
return (this == obj) ||
(obj instanceof Key)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._lang, this._lang)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._scrt, this._scrt)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._regn, this._regn)
&& AsciiUtil.caseIgnoreMatch(((Key)obj)._vart, this._vart);
}
@Override
public int compareTo(Key other) {
int res = AsciiUtil.caseIgnoreCompare(this._lang, other._lang);
if (res == 0) {
res = AsciiUtil.caseIgnoreCompare(this._scrt, other._scrt);
if (res == 0) {
res = AsciiUtil.caseIgnoreCompare(this._regn, other._regn);
if (res == 0) {
if (JDKIMPL) {
res = this._vart.compareTo(other._vart);
} else {
res = AsciiUtil.caseIgnoreCompare(this._vart, other._vart);
}
}
}
}
return res;
}
@Override
public int hashCode() {
int h = _hash;
if (h == 0) {
// Generating a hash value from language, script, region and variant
for (int i = 0; i < _lang.length(); i++) {
h = 31*h + AsciiUtil.toLower(_lang.charAt(i));
}
for (int i = 0; i < _scrt.length(); i++) {
h = 31*h + AsciiUtil.toLower(_scrt.charAt(i));
}
for (int i = 0; i < _regn.length(); i++) {
h = 31*h + AsciiUtil.toLower(_regn.charAt(i));
}
for (int i = 0; i < _vart.length(); i++) {
if (JDKIMPL) {
h = 31*h + _vart.charAt(i);
} else {
h = 31*h + AsciiUtil.toLower(_vart.charAt(i));
}
}
_hash = h;
}
return h;
}
public static Key normalize(Key key) {
String lang = AsciiUtil.toLowerString(key._lang).intern();
String scrt = AsciiUtil.toTitleString(key._scrt).intern();
String regn = AsciiUtil.toUpperString(key._regn).intern();
String vart;
if (JDKIMPL) {
// preserve upper/lower cases
vart = key._vart.intern();
} else {
vart = AsciiUtil.toUpperString(key._vart).intern();
}
return new Key(lang, scrt, regn, vart);
}
}
private static class Cache extends LocaleObjectCache {
public Cache() {
}
@Override
protected Key normalizeKey(Key key) {
return Key.normalize(key);
}
@Override
protected BaseLocale createObject(Key key) {
return new BaseLocale(key._lang, key._scrt, key._regn, key._vart);
}
}
}