Java example source code file (BaseLocale.java)
The BaseLocale.java Java example source code
/*
* Copyright (c) 2010, 2011, 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
* 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
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
*******************************************************************************
* Copyright (C) 2009-2010, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package sun.util.locale;
public final class BaseLocale {
public static final String SEP = "_";
private static final Cache CACHE = new Cache();
private final String language;
private final String script;
private final String region;
private final String variant;
private volatile int hash = 0;
// This method must be called only when creating the Locale.* constants.
private BaseLocale(String language, String region) {
this.language = language;
this.script = "";
this.region = region;
this.variant = "";
}
private BaseLocale(String language, String script, String region, String variant) {
this.language = (language != null) ? LocaleUtils.toLowerString(language).intern() : "";
this.script = (script != null) ? LocaleUtils.toTitleString(script).intern() : "";
this.region = (region != null) ? LocaleUtils.toUpperString(region).intern() : "";
this.variant = (variant != null) ? variant.intern() : "";
}
// Called for creating the Locale.* constants. No argument
// validation is performed.
public static BaseLocale createInstance(String language, String region) {
BaseLocale base = new BaseLocale(language, region);
CACHE.put(new Key(language, region), base);
return base;
}
public static BaseLocale getInstance(String language, String script,
String region, String variant) {
// JDK uses deprecated ISO639.1 language codes for he, yi and id
if (language != null) {
if (LocaleUtils.caseIgnoreMatch(language, "he")) {
language = "iw";
} else if (LocaleUtils.caseIgnoreMatch(language, "yi")) {
language = "ji";
} else if (LocaleUtils.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 language == other.language
&& script == other.script
&& region == other.region
&& variant == 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
h = language.hashCode();
h = 31 * h + script.hashCode();
h = 31 * h + region.hashCode();
h = 31 * h + variant.hashCode();
hash = h;
}
return h;
}
private static final class Key implements Comparable<Key> {
private final String lang;
private final String scrt;
private final String regn;
private final String vart;
private final boolean normalized;
private final int hash;
/**
* Creates a Key. language and region must be normalized
* (intern'ed in the proper case).
*/
private Key(String language, String region) {
assert language.intern() == language
&& region.intern() == region;
lang = language;
scrt = "";
regn = region;
vart = "";
this.normalized = true;
int h = language.hashCode();
if (region != "") {
int len = region.length();
for (int i = 0; i < len; i++) {
h = 31 * h + LocaleUtils.toLower(region.charAt(i));
}
}
hash = h;
}
public Key(String language, String script, String region, String variant) {
this(language, script, region, variant, false);
}
private Key(String language, String script, String region,
String variant, boolean normalized) {
int h = 0;
if (language != null) {
lang = language;
int len = language.length();
for (int i = 0; i < len; i++) {
h = 31*h + LocaleUtils.toLower(language.charAt(i));
}
} else {
lang = "";
}
if (script != null) {
scrt = script;
int len = script.length();
for (int i = 0; i < len; i++) {
h = 31*h + LocaleUtils.toLower(script.charAt(i));
}
} else {
scrt = "";
}
if (region != null) {
regn = region;
int len = region.length();
for (int i = 0; i < len; i++) {
h = 31*h + LocaleUtils.toLower(region.charAt(i));
}
} else {
regn = "";
}
if (variant != null) {
vart = variant;
int len = variant.length();
for (int i = 0; i < len; i++) {
h = 31*h + variant.charAt(i);
}
} else {
vart = "";
}
hash = h;
this.normalized = normalized;
}
@Override
public boolean equals(Object obj) {
return (this == obj) ||
(obj instanceof Key)
&& this.hash == ((Key)obj).hash
&& LocaleUtils.caseIgnoreMatch(((Key)obj).lang, this.lang)
&& LocaleUtils.caseIgnoreMatch(((Key)obj).scrt, this.scrt)
&& LocaleUtils.caseIgnoreMatch(((Key)obj).regn, this.regn)
&& ((Key)obj).vart.equals(vart); // variant is case sensitive in JDK!
}
@Override
public int compareTo(Key other) {
int res = LocaleUtils.caseIgnoreCompare(this.lang, other.lang);
if (res == 0) {
res = LocaleUtils.caseIgnoreCompare(this.scrt, other.scrt);
if (res == 0) {
res = LocaleUtils.caseIgnoreCompare(this.regn, other.regn);
if (res == 0) {
res = this.vart.compareTo(other.vart);
}
}
}
return res;
}
@Override
public int hashCode() {
return hash;
}
public static Key normalize(Key key) {
if (key.normalized) {
return key;
}
String lang = LocaleUtils.toLowerString(key.lang).intern();
String scrt = LocaleUtils.toTitleString(key.scrt).intern();
String regn = LocaleUtils.toUpperString(key.regn).intern();
String vart = key.vart.intern(); // preserve upper/lower cases
return new Key(lang, scrt, regn, vart, true);
}
}
private static class Cache extends LocaleObjectCache<Key, BaseLocale> {
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);
}
}
}
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