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/*******************************************************************************
* Copyright (c) 2011 Google, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Google, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.wb.internal.core.nls.model;
import java.util.Locale;
/**
* Information about {@link Locale}.
*
* We separate {@link LocaleInfo} from {@link BundleInfo} because {@link BundleInfo} is wrapper for
* single *.properties file and we support more than one source of bundles in one
* {@link CompilationUnit}.
*
* @author scheglov_ke
* @coverage core.nls
*/
public final class LocaleInfo implements Comparable<LocaleInfo> {
/**
* The default {@link LocaleInfo}.
*/
public static final LocaleInfo DEFAULT = new LocaleInfo(null);
////////////////////////////////////////////////////////////////////////////
//
// Instance fields
//
////////////////////////////////////////////////////////////////////////////
private final Locale m_locale;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public LocaleInfo(Locale locale) {
m_locale = locale;
}
////////////////////////////////////////////////////////////////////////////
//
// Object
//
////////////////////////////////////////////////////////////////////////////
@Override
public String toString() {
return getTitle();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj instanceof LocaleInfo) {
LocaleInfo localeInfo = (LocaleInfo) obj;
if (isDefault()) {
return localeInfo.isDefault();
}
return m_locale.equals(localeInfo.m_locale);
}
return false;
}
@Override
public int hashCode() {
if (isDefault()) {
return 0;
}
return m_locale.hashCode();
}
////////////////////////////////////////////////////////////////////////////
//
// Comparable
//
////////////////////////////////////////////////////////////////////////////
@Override
public int compareTo(LocaleInfo o) {
if (m_locale == null) {
if (o.m_locale == null) {
return 0;
}
return -1;
}
if (o.m_locale == null) {
return 1;
}
String localeNameA = m_locale.toString();
String localeNameB = o.m_locale.toString();
return localeNameA.compareTo(localeNameB);
}
////////////////////////////////////////////////////////////////////////////
//
// Access
//
////////////////////////////////////////////////////////////////////////////
/**
* @return {@link Locale} for this {@link LocaleInfo}.
*/
public Locale getLocale() {
return m_locale;
}
/**
* @return <code>true</code> if that {@link Locale} is default.
*/
public boolean isDefault() {
return m_locale == null;
}
/**
* @return the title to display in UI.
*/
public String getTitle() {
if (isDefault()) {
return "(default)";
}
return m_locale.toString();
}
////////////////////////////////////////////////////////////////////////////
//
// Utils
//
////////////////////////////////////////////////////////////////////////////
/**
* @return the "parent" {@link LocaleInfo} from given array.<br>
* Here "parent" is locale that is more general than current one.<br>
* For example "parent" locale for 'ru_RU' is 'ru'.
*
* If there are no parent locale in array, return default locale.<br>
*/
public LocaleInfo getParent(LocaleInfo locales[]) {
String localeName = m_locale.toString();
int lastSeparatorIndex = localeName.lastIndexOf('_');
if (lastSeparatorIndex != -1) {
String parentLocaleName = localeName.substring(0, lastSeparatorIndex);
// try to find locale with parent name
for (LocaleInfo locale : locales) {
if (locale.getLocale() != null && locale.getLocale().toString().equals(parentLocaleName)) {
return locale;
}
}
}
// use default
return LocaleInfo.DEFAULT;
}
/**
* @param localeName
* the name of locale, such as "en" or "ru_RU".
* @param localeDescription
* the description of {@link Locale}, used in exception.
* @return the {@link LocaleInfo} which wraps {@link Locale}.
*/
public static LocaleInfo create(String localeName, String localeDescription) {
// try to find locale in list of available locales
Locale[] locales = Locale.getAvailableLocales();
for (int i = 0; i < locales.length; i++) {
Locale locale = locales[i];
if (locale.toString().equals(localeName)) {
return new LocaleInfo(locale);
}
}
// try to create new, this constructor is since 1.4, so do this in try/catch
try {
Locale locale;
int separatorIndex = localeName.indexOf('_');
if (separatorIndex != -1) {
String language = localeName.substring(0, separatorIndex);
String country = localeName.substring(separatorIndex + 1);
locale = new Locale(language, country);
} else {
locale = new Locale(localeName);
}
return new LocaleInfo(locale);
} catch (Throwable e) {
String msg = "Locale not found for " + localeDescription;
throw new IllegalArgumentException(msg);
}
}
}
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