sun.util.locale.provider.TimeZoneNameProviderImpl Maven / Gradle / Ivy
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/*
* Copyright (c) 2012, 2018, 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
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package sun.util.locale.provider;
import java.util.Locale;
import java.util.Objects;
import java.util.Set;
import java.util.TimeZone;
import java.util.spi.TimeZoneNameProvider;
/**
* Concrete implementation of the
* {@link java.util.spi.TimeZoneNameProvider TimeZoneNameProvider} class
* for the JRE LocaleProviderAdapter.
*
* @author Naoto Sato
* @author Masayoshi Okutsu
*/
public class TimeZoneNameProviderImpl extends TimeZoneNameProvider {
private final LocaleProviderAdapter.Type type;
private final Set langtags;
protected TimeZoneNameProviderImpl(LocaleProviderAdapter.Type type, Set langtags) {
this.type = type;
this.langtags = langtags;
}
/**
* Returns an array of all locales for which this locale service provider
* can provide localized objects or names.
*
* @return An array of all locales for which this locale service provider
* can provide localized objects or names.
*/
@Override
public Locale[] getAvailableLocales() {
return LocaleProviderAdapter.toLocaleArray(langtags);
}
@Override
public boolean isSupportedLocale(Locale locale) {
return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags);
}
/**
* Returns a name for the given time zone ID that's suitable for
* presentation to the user in the specified locale. The given time
* zone ID is "GMT" or one of the names defined using "Zone" entries
* in the "tz database", a public domain time zone database at
* ftp://elsie.nci.nih.gov/pub/.
* The data of this database is contained in a file whose name starts with
* "tzdata", and the specification of the data format is part of the zic.8
* man page, which is contained in a file whose name starts with "tzcode".
*
* If daylight is true, the method should return a name
* appropriate for daylight saving time even if the specified time zone
* has not observed daylight saving time in the past.
*
* @param id a time zone ID string
* @param daylight if true, return the daylight saving name.
* @param style either {@link java.util.TimeZone#LONG TimeZone.LONG} or
* {@link java.util.TimeZone#SHORT TimeZone.SHORT}
* @param locale the desired locale
* @return the human-readable name of the given time zone in the
* given locale, or null if it's not available.
* @exception IllegalArgumentException if style is invalid,
* or locale isn't one of the locales returned from
* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
* getAvailableLocales()}.
* @exception NullPointerException if ID or locale
* is null
* @see java.util.TimeZone#getDisplayName(boolean, int, java.util.Locale)
*/
@Override
public String getDisplayName(String id, boolean daylight, int style, Locale locale) {
String[] names = getDisplayNameArray(id, locale);
if (Objects.nonNull(names)) {
assert names.length >= 7;
int index = daylight ? 3 : 1;
if (style == TimeZone.SHORT) {
index++;
}
return names[index];
}
return null;
}
@Override
public String getGenericDisplayName(String id, int style, Locale locale) {
String[] names = getDisplayNameArray(id, locale);
if (Objects.nonNull(names)) {
assert names.length >= 7;
return names[(style == TimeZone.LONG) ? 5 : 6];
}
return null;
}
protected String[] getDisplayNameArray(String id, Locale locale) {
Objects.requireNonNull(id);
Objects.requireNonNull(locale);
return (String []) LocaleProviderAdapter.forType(type)
.getLocaleResources(locale)
.getTimeZoneNames(id);
}
/**
* Returns a String[][] as the DateFormatSymbols.getZoneStrings() value for
* the given locale.
*
* @param locale a Locale for time zone names
* @return an array of time zone names arrays
*/
protected String[][] getZoneStrings(Locale locale) {
return LocaleProviderAdapter.forType(type).getLocaleResources(locale).getZoneStrings();
}
}