| /* |
| * Copyright (c) 2005, 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. |
| */ |
| |
| package sun.util; |
| |
| import java.lang.ref.SoftReference; |
| import java.util.Enumeration; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.MissingResourceException; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.spi.TimeZoneNameProvider; |
| import sun.util.calendar.ZoneInfo; |
| import sun.util.resources.LocaleData; |
| import sun.util.resources.OpenListResourceBundle; |
| |
| /** |
| * Utility class that deals with the localized time zone names |
| */ |
| public final class TimeZoneNameUtility { |
| |
| /** |
| * cache to hold time zone resource bundles. Keyed by Locale |
| */ |
| private static ConcurrentHashMap<Locale, SoftReference<OpenListResourceBundle>> cachedBundles = |
| new ConcurrentHashMap<Locale, SoftReference<OpenListResourceBundle>>(); |
| |
| /** |
| * cache to hold time zone localized strings. Keyed by Locale |
| */ |
| private static ConcurrentHashMap<Locale, SoftReference<String[][]>> cachedZoneData = |
| new ConcurrentHashMap<Locale, SoftReference<String[][]>>(); |
| |
| /** |
| * get time zone localized strings. Enumerate all keys. |
| */ |
| public static final String[][] getZoneStrings(Locale locale) { |
| String[][] zones; |
| SoftReference<String[][]> data = cachedZoneData.get(locale); |
| |
| if (data == null || ((zones = data.get()) == null)) { |
| zones = loadZoneStrings(locale); |
| data = new SoftReference<String[][]>(zones); |
| cachedZoneData.put(locale, data); |
| } |
| |
| return zones; |
| } |
| |
| private static final String[][] loadZoneStrings(Locale locale) { |
| List<String[]> zones = new LinkedList<String[]>(); |
| OpenListResourceBundle rb = getBundle(locale); |
| Enumeration<String> keys = rb.getKeys(); |
| String[] names = null; |
| |
| while(keys.hasMoreElements()) { |
| String key = keys.nextElement(); |
| |
| names = retrieveDisplayNames(rb, key, locale); |
| if (names != null) { |
| zones.add(names); |
| } |
| } |
| |
| String[][] zonesArray = new String[zones.size()][]; |
| return zones.toArray(zonesArray); |
| } |
| |
| /** |
| * Retrieve display names for a time zone ID. |
| */ |
| public static final String[] retrieveDisplayNames(String id, Locale locale) { |
| OpenListResourceBundle rb = getBundle(locale); |
| return retrieveDisplayNames(rb, id, locale); |
| } |
| |
| private static final String[] retrieveDisplayNames(OpenListResourceBundle rb, |
| String id, Locale locale) { |
| LocaleServiceProviderPool pool = |
| LocaleServiceProviderPool.getPool(TimeZoneNameProvider.class); |
| String[] names = null; |
| |
| // Check whether a provider can provide an implementation that's closer |
| // to the requested locale than what the Java runtime itself can provide. |
| if (pool.hasProviders()) { |
| names = pool.getLocalizedObject( |
| TimeZoneNameGetter.INSTANCE, |
| locale, rb, id); |
| } |
| |
| if (names == null) { |
| try { |
| names = rb.getStringArray(id); |
| } catch (MissingResourceException mre) { |
| // fall through |
| } |
| } |
| |
| return names; |
| } |
| |
| private static final OpenListResourceBundle getBundle(Locale locale) { |
| OpenListResourceBundle rb; |
| SoftReference<OpenListResourceBundle> data = cachedBundles.get(locale); |
| |
| if (data == null || ((rb = data.get()) == null)) { |
| rb = LocaleData.getTimeZoneNames(locale); |
| data = new SoftReference<OpenListResourceBundle>(rb); |
| cachedBundles.put(locale, data); |
| } |
| |
| return rb; |
| } |
| |
| /** |
| * Obtains a localized time zone strings from a TimeZoneNameProvider |
| * implementation. |
| */ |
| private static class TimeZoneNameGetter |
| implements LocaleServiceProviderPool.LocalizedObjectGetter<TimeZoneNameProvider, |
| String[]>{ |
| private static final TimeZoneNameGetter INSTANCE = |
| new TimeZoneNameGetter(); |
| |
| public String[] getObject(TimeZoneNameProvider timeZoneNameProvider, |
| Locale locale, |
| String requestID, |
| Object... params) { |
| assert params.length == 0; |
| String[] names = null; |
| String queryID = requestID; |
| |
| if (queryID.equals("GMT")) { |
| names = buildZoneStrings(timeZoneNameProvider, locale, queryID); |
| } else { |
| Map<String, String> aliases = ZoneInfo.getAliasTable(); |
| |
| if (aliases != null) { |
| // Check whether this id is an alias, if so, |
| // look for the standard id. |
| if (aliases.containsKey(queryID)) { |
| String prevID = queryID; |
| while ((queryID = aliases.get(queryID)) != null) { |
| prevID = queryID; |
| } |
| queryID = prevID; |
| } |
| |
| names = buildZoneStrings(timeZoneNameProvider, locale, queryID); |
| |
| if (names == null) { |
| // There may be a case that a standard id has become an |
| // alias. so, check the aliases backward. |
| names = examineAliases(timeZoneNameProvider, locale, |
| queryID, aliases, aliases.entrySet()); |
| } |
| } |
| } |
| |
| if (names != null) { |
| names[0] = requestID; |
| } |
| |
| return names; |
| } |
| |
| private static String[] examineAliases(TimeZoneNameProvider tznp, Locale locale, |
| String id, |
| Map<String, String> aliases, |
| Set<Map.Entry<String, String>> aliasesSet) { |
| if (aliases.containsValue(id)) { |
| for (Map.Entry<String, String> entry : aliasesSet) { |
| if (entry.getValue().equals(id)) { |
| String alias = entry.getKey(); |
| String[] names = buildZoneStrings(tznp, locale, alias); |
| if (names != null) { |
| return names; |
| } else { |
| names = examineAliases(tznp, locale, alias, aliases, aliasesSet); |
| if (names != null) { |
| return names; |
| } |
| } |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| private static String[] buildZoneStrings(TimeZoneNameProvider tznp, |
| Locale locale, String id) { |
| String[] names = new String[5]; |
| |
| for (int i = 1; i <= 4; i ++) { |
| names[i] = tznp.getDisplayName(id, i>=3, i%2, locale); |
| if (i >= 3 && names[i] == null) { |
| names[i] = names[i-2]; |
| } |
| } |
| |
| if (names[1] == null) { |
| // this id seems not localized by this provider |
| names = null; |
| } |
| |
| return names; |
| } |
| } |
| } |