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5c3a01591c
8236548: Localized time zone name inconsistency between English and other locales Reviewed-by: joehw, rriggs
326 lines
12 KiB
Java
326 lines
12 KiB
Java
/*
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* Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.util.cldr;
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import static sun.util.locale.provider.LocaleProviderAdapter.Type;
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import java.text.MessageFormat;
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import java.util.Arrays;
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import java.util.Locale;
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import java.util.Objects;
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import java.util.ResourceBundle;
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import java.util.Set;
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import java.util.TimeZone;
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import sun.util.calendar.ZoneInfoFile;
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import sun.util.locale.provider.LocaleProviderAdapter;
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import sun.util.locale.provider.LocaleResources;
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import sun.util.locale.provider.TimeZoneNameProviderImpl;
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import sun.util.locale.provider.TimeZoneNameUtility;
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/**
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* Concrete implementation of the
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* {@link java.util.spi.TimeZoneNameProvider TimeZoneNameProvider} class
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* for the CLDR LocaleProviderAdapter.
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*
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* @author Naoto Sato
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*/
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public class CLDRTimeZoneNameProviderImpl extends TimeZoneNameProviderImpl {
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private static final String NO_INHERITANCE_MARKER = "\u2205\u2205\u2205";
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private static class AVAILABLE_IDS {
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static final String[] INSTANCE =
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Arrays.stream(ZoneInfoFile.getZoneIds())
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.sorted()
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.toArray(String[]::new);
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}
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// display name array indexes
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private static final int INDEX_TZID = 0;
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private static final int INDEX_STD_LONG = 1;
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private static final int INDEX_STD_SHORT = 2;
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private static final int INDEX_DST_LONG = 3;
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private static final int INDEX_DST_SHORT = 4;
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private static final int INDEX_GEN_LONG = 5;
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private static final int INDEX_GEN_SHORT = 6;
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public CLDRTimeZoneNameProviderImpl(Type type, Set<String> langtags) {
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super(type, langtags);
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}
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@Override
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protected String[] getDisplayNameArray(String id, Locale locale) {
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String[] namesSuper = super.getDisplayNameArray(id, locale);
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if (namesSuper == null) {
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// try canonical id instead
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namesSuper = super.getDisplayNameArray(
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TimeZoneNameUtility.canonicalTZID(id).orElse(id),
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locale);
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}
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if (namesSuper != null) {
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// CLDR's resource bundle has an translated entry for this id.
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// Fix up names if needed, either missing or no-inheritance
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namesSuper[INDEX_TZID] = id;
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for(int i = INDEX_STD_LONG; i < namesSuper.length; i++) { // index 0 is the 'id' itself
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switch (namesSuper[i]) {
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case "":
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// Fill in empty elements
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deriveFallbackName(namesSuper, i, locale,
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!TimeZone.getTimeZone(id).useDaylightTime());
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break;
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case NO_INHERITANCE_MARKER:
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// CLDR's "no inheritance marker"
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namesSuper[i] = toGMTFormat(id, i == INDEX_DST_LONG || i == INDEX_DST_SHORT,
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locale);
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break;
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default:
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break;
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}
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}
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return namesSuper;
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} else {
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// Derive the names for this id. Validate the id first.
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if (Arrays.binarySearch(AVAILABLE_IDS.INSTANCE, id) >= 0) {
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String[] names = new String[INDEX_GEN_SHORT + 1];
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names[INDEX_TZID] = id;
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deriveFallbackNames(names, locale);
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return names;
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}
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}
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return null;
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}
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@Override
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protected String[][] getZoneStrings(Locale locale) {
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String[][] ret = super.getZoneStrings(locale);
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// Fill in for the empty names.
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for (int zoneIndex = 0; zoneIndex < ret.length; zoneIndex++) {
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deriveFallbackNames(ret[zoneIndex], locale);
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}
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return ret;
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}
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// Derive fallback time zone name according to LDML's logic
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private void deriveFallbackNames(String[] names, Locale locale) {
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boolean noDST = !TimeZone.getTimeZone(names[0]).useDaylightTime();
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for (int i = INDEX_STD_LONG; i <= INDEX_GEN_SHORT; i++) {
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deriveFallbackName(names, i, locale, noDST);
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}
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}
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private void deriveFallbackName(String[] names, int index, Locale locale, boolean noDST) {
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String id = names[INDEX_TZID];
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if (exists(names, index)) {
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if (names[index].equals(NO_INHERITANCE_MARKER)) {
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// CLDR's "no inheritance marker"
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names[index] = toGMTFormat(id,
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index == INDEX_DST_LONG || index == INDEX_DST_SHORT,
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locale);
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}
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return;
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}
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// Check parent locale first
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if (!exists(names, index)) {
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CLDRLocaleProviderAdapter clpa = (CLDRLocaleProviderAdapter)LocaleProviderAdapter.forType(Type.CLDR);
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var cands = clpa.getCandidateLocales("", locale);
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if (cands.size() > 1) {
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var parentLoc = cands.get(1); // immediate parent locale
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String[] parentNames = super.getDisplayNameArray(id, parentLoc);
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if (parentNames != null && !parentNames[index].isEmpty()) {
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names[index] = parentNames[index];
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return;
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}
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}
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}
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// Check if COMPAT can substitute the name
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if (LocaleProviderAdapter.getAdapterPreference().contains(Type.JRE)) {
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String[] compatNames = (String[])LocaleProviderAdapter.forJRE()
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.getLocaleResources(mapChineseLocale(locale))
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.getTimeZoneNames(id);
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if (compatNames != null) {
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for (int i = INDEX_STD_LONG; i <= INDEX_GEN_SHORT; i++) {
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// Assumes COMPAT has no empty slots
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if (i == index || !exists(names, i)) {
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names[i] = compatNames[i];
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}
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}
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return;
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}
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}
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// Region Fallback
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if (regionFormatFallback(names, index, locale)) {
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return;
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}
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// Type Fallback
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if (noDST && typeFallback(names, index)) {
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return;
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}
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// last resort
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names[index] = toGMTFormat(id,
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index == INDEX_DST_LONG || index == INDEX_DST_SHORT,
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locale);
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// aliases of "GMT" timezone.
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if ((exists(names, INDEX_STD_LONG)) && (id.startsWith("Etc/")
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|| id.startsWith("GMT") || id.startsWith("Greenwich"))) {
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switch (id) {
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case "Etc/GMT":
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case "Etc/GMT-0":
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case "Etc/GMT+0":
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case "Etc/GMT0":
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case "GMT+0":
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case "GMT-0":
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case "GMT0":
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case "Greenwich":
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names[INDEX_DST_LONG] = names[INDEX_GEN_LONG] = names[INDEX_STD_LONG];
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break;
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}
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}
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}
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private boolean exists(String[] names, int index) {
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return Objects.nonNull(names)
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&& Objects.nonNull(names[index])
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&& !names[index].isEmpty();
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}
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private boolean typeFallback(String[] names, int index) {
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// check generic
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int genIndex = INDEX_GEN_SHORT - index % 2;
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if (!exists(names, index) && exists(names, genIndex) && !names[genIndex].startsWith("GMT")) {
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names[index] = names[genIndex];
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} else {
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// check standard
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int stdIndex = INDEX_STD_SHORT - index % 2;
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if (!exists(names, index) && exists(names, stdIndex) && !names[stdIndex].startsWith("GMT")) {
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names[index] = names[stdIndex];
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}
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}
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return exists(names, index);
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}
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private boolean regionFormatFallback(String[] names, int index, Locale l) {
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String id = names[INDEX_TZID];
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LocaleResources lr = LocaleProviderAdapter.forType(Type.CLDR).getLocaleResources(l);
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ResourceBundle fd = lr.getJavaTimeFormatData();
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id = TimeZoneNameUtility.canonicalTZID(id).orElse(id);
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String rgn = (String) lr.getTimeZoneNames("timezone.excity." + id);
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if (rgn == null && !id.startsWith("Etc") && !id.startsWith("SystemV")) {
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int slash = id.lastIndexOf('/');
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if (slash > 0) {
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rgn = id.substring(slash + 1).replaceAll("_", " ");
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}
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}
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if (rgn != null) {
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String fmt = "";
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switch (index) {
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case INDEX_STD_LONG:
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fmt = fd.getString("timezone.regionFormat.standard");
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break;
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case INDEX_DST_LONG:
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fmt = fd.getString("timezone.regionFormat.daylight");
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break;
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case INDEX_GEN_LONG:
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fmt = fd.getString("timezone.regionFormat");
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break;
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}
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if (!fmt.isEmpty()) {
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names[index] = MessageFormat.format(fmt, rgn);
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}
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}
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return exists(names, index);
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}
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private String toGMTFormat(String id, boolean daylight, Locale l) {
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TimeZone tz = ZoneInfoFile.getZoneInfo(id);
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int offset = (tz.getRawOffset() + (daylight ? tz.getDSTSavings() : 0)) / 60000;
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LocaleResources lr = LocaleProviderAdapter.forType(Type.CLDR).getLocaleResources(l);
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ResourceBundle fd = lr.getJavaTimeFormatData();
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if (offset == 0) {
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return fd.getString("timezone.gmtZeroFormat");
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} else {
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String gmtFormat = fd.getString("timezone.gmtFormat");
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String hourFormat = fd.getString("timezone.hourFormat");
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if (offset > 0) {
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hourFormat = hourFormat.substring(0, hourFormat.indexOf(";"));
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} else {
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hourFormat = hourFormat.substring(hourFormat.indexOf(";") + 1);
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offset = -offset;
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}
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hourFormat = hourFormat
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.replaceFirst("H+", "\\%1\\$02d")
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.replaceFirst("m+", "\\%2\\$02d");
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return MessageFormat.format(gmtFormat,
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String.format(l, hourFormat, offset / 60, offset % 60));
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}
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}
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// Mapping CLDR's Simplified/Traditional Chinese resources
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// to COMPAT's zh-CN/TW
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private Locale mapChineseLocale(Locale locale) {
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if (locale.getLanguage() == "zh") {
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switch (locale.getScript()) {
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case "Hans":
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return Locale.CHINA;
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case "Hant":
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return Locale.TAIWAN;
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case "":
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// no script, guess from country code.
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switch (locale.getCountry()) {
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case "":
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case "CN":
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case "SG":
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return Locale.CHINA;
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case "HK":
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case "MO":
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case "TW":
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return Locale.TAIWAN;
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}
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break;
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}
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}
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// no need to map
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return locale;
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}
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}
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