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| 1 | /* | ||
| 2 | * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.util; | ||
| 27 | |||
| 28 | import java.lang.ref.SoftReference; | ||
| 29 | import java.util.Enumeration; | ||
| 30 | import java.util.LinkedList; | ||
| 31 | import java.util.List; | ||
| 32 | import java.util.Locale; | ||
| 33 | import java.util.Map; | ||
| 34 | import java.util.MissingResourceException; | ||
| 35 | import java.util.Set; | ||
| 36 | import java.util.concurrent.ConcurrentHashMap; | ||
| 37 | import java.util.spi.TimeZoneNameProvider; | ||
| 38 | import sun.util.calendar.ZoneInfo; | ||
| 39 | import sun.util.resources.LocaleData; | ||
| 40 | import sun.util.resources.OpenListResourceBundle; | ||
| 41 | |||
| 42 | /** | ||
| 43 | * Utility class that deals with the localized time zone names | ||
| 44 | */ | ||
| 45 | public final class TimeZoneNameUtility { | ||
| 46 | |||
| 47 | /** | ||
| 48 | * cache to hold time zone resource bundles. Keyed by Locale | ||
| 49 | */ | ||
| 50 | private static ConcurrentHashMap<Locale, SoftReference<OpenListResourceBundle>> cachedBundles = | ||
| 51 | new ConcurrentHashMap<Locale, SoftReference<OpenListResourceBundle>>(); | ||
| 52 | |||
| 53 | /** | ||
| 54 | * cache to hold time zone localized strings. Keyed by Locale | ||
| 55 | */ | ||
| 56 | private static ConcurrentHashMap<Locale, SoftReference<String[][]>> cachedZoneData = | ||
| 57 | new ConcurrentHashMap<Locale, SoftReference<String[][]>>(); | ||
| 58 | |||
| 59 | /** | ||
| 60 | * get time zone localized strings. Enumerate all keys. | ||
| 61 | */ | ||
| 62 | public static final String[][] getZoneStrings(Locale locale) { | ||
| 63 | String[][] zones; | ||
| 64 | SoftReference<String[][]> data = cachedZoneData.get(locale); | ||
| 65 | |||
| 66 | if (data == null || ((zones = data.get()) == null)) { | ||
| 67 | zones = loadZoneStrings(locale); | ||
| 68 | data = new SoftReference<String[][]>(zones); | ||
| 69 | cachedZoneData.put(locale, data); | ||
| 70 | } | ||
| 71 | |||
| 72 | return zones; | ||
| 73 | } | ||
| 74 | |||
| 75 | private static final String[][] loadZoneStrings(Locale locale) { | ||
| 76 | List<String[]> zones = new LinkedList<String[]>(); | ||
| 77 | OpenListResourceBundle rb = getBundle(locale); | ||
| 78 | Enumeration<String> keys = rb.getKeys(); | ||
| 79 | String[] names = null; | ||
| 80 | |||
| 81 | while(keys.hasMoreElements()) { | ||
| 82 | String key = keys.nextElement(); | ||
| 83 | |||
| 84 | names = retrieveDisplayNames(rb, key, locale); | ||
| 85 | if (names != null) { | ||
| 86 | zones.add(names); | ||
| 87 | } | ||
| 88 | } | ||
| 89 | |||
| 90 | String[][] zonesArray = new String[zones.size()][]; | ||
| 91 | return zones.toArray(zonesArray); | ||
| 92 | } | ||
| 93 | |||
| 94 | /** | ||
| 95 | * Retrieve display names for a time zone ID. | ||
| 96 | */ | ||
| 97 | public static final String[] retrieveDisplayNames(String id, Locale locale) { | ||
| 98 | OpenListResourceBundle rb = getBundle(locale); | ||
| 99 | return retrieveDisplayNames(rb, id, locale); | ||
| 100 | } | ||
| 101 | |||
| 102 | private static final String[] retrieveDisplayNames(OpenListResourceBundle rb, | ||
| 103 | String id, Locale locale) { | ||
| 104 | LocaleServiceProviderPool pool = | ||
| 105 | LocaleServiceProviderPool.getPool(TimeZoneNameProvider.class); | ||
| 106 | String[] names = null; | ||
| 107 | |||
| 108 | // Check whether a provider can provide an implementation that's closer | ||
| 109 | // to the requested locale than what the Java runtime itself can provide. | ||
| 110 | if (pool.hasProviders()) { | ||
| 111 | names = pool.getLocalizedObject( | ||
| 112 | TimeZoneNameGetter.INSTANCE, | ||
| 113 | locale, rb, id); | ||
| 114 | } | ||
| 115 | |||
| 116 | if (names == null) { | ||
| 117 | try { | ||
| 118 | names = rb.getStringArray(id); | ||
| 119 | } catch (MissingResourceException mre) { | ||
| 120 | // fall through | ||
| 121 | } | ||
| 122 | } | ||
| 123 | |||
| 124 | return names; | ||
| 125 | } | ||
| 126 | |||
| 127 | private static final OpenListResourceBundle getBundle(Locale locale) { | ||
| 128 | OpenListResourceBundle rb; | ||
| 129 | SoftReference<OpenListResourceBundle> data = cachedBundles.get(locale); | ||
| 130 | |||
| 131 | if (data == null || ((rb = data.get()) == null)) { | ||
| 132 | rb = LocaleData.getTimeZoneNames(locale); | ||
| 133 | data = new SoftReference<OpenListResourceBundle>(rb); | ||
| 134 | cachedBundles.put(locale, data); | ||
| 135 | } | ||
| 136 | |||
| 137 | return rb; | ||
| 138 | } | ||
| 139 | |||
| 140 | /** | ||
| 141 | * Obtains a localized time zone strings from a TimeZoneNameProvider | ||
| 142 | * implementation. | ||
| 143 | */ | ||
| 144 | private static class TimeZoneNameGetter | ||
| 145 | implements LocaleServiceProviderPool.LocalizedObjectGetter<TimeZoneNameProvider, | ||
| 146 | String[]>{ | ||
| 147 | private static final TimeZoneNameGetter INSTANCE = | ||
| 148 | new TimeZoneNameGetter(); | ||
| 149 | |||
| 150 | public String[] getObject(TimeZoneNameProvider timeZoneNameProvider, | ||
| 151 | Locale locale, | ||
| 152 | String requestID, | ||
| 153 | Object... params) { | ||
| 154 | assert params.length == 0; | ||
| 155 | String[] names = null; | ||
| 156 | String queryID = requestID; | ||
| 157 | |||
| 158 | if (queryID.equals("GMT")) { | ||
| 159 | names = buildZoneStrings(timeZoneNameProvider, locale, queryID); | ||
| 160 | } else { | ||
| 161 | Map<String, String> aliases = ZoneInfo.getAliasTable(); | ||
| 162 | |||
| 163 | if (aliases != null) { | ||
| 164 | // Check whether this id is an alias, if so, | ||
| 165 | // look for the standard id. | ||
| 166 | if (aliases.containsKey(queryID)) { | ||
| 167 | String prevID = queryID; | ||
| 168 | while ((queryID = aliases.get(queryID)) != null) { | ||
| 169 | prevID = queryID; | ||
| 170 | } | ||
| 171 | queryID = prevID; | ||
| 172 | } | ||
| 173 | |||
| 174 | names = buildZoneStrings(timeZoneNameProvider, locale, queryID); | ||
| 175 | |||
| 176 | if (names == null) { | ||
| 177 | // There may be a case that a standard id has become an | ||
| 178 | // alias. so, check the aliases backward. | ||
| 179 | names = examineAliases(timeZoneNameProvider, locale, | ||
| 180 | queryID, aliases, aliases.entrySet()); | ||
| 181 | } | ||
| 182 | } | ||
| 183 | } | ||
| 184 | |||
| 185 | if (names != null) { | ||
| 186 | names[0] = requestID; | ||
| 187 | } | ||
| 188 | |||
| 189 | return names; | ||
| 190 | } | ||
| 191 | |||
| 192 | private static String[] examineAliases(TimeZoneNameProvider tznp, Locale locale, | ||
| 193 | String id, | ||
| 194 | Map<String, String> aliases, | ||
| 195 | Set<Map.Entry<String, String>> aliasesSet) { | ||
| 196 | if (aliases.containsValue(id)) { | ||
| 197 | for (Map.Entry<String, String> entry : aliasesSet) { | ||
| 198 | if (entry.getValue().equals(id)) { | ||
| 199 | String alias = entry.getKey(); | ||
| 200 | String[] names = buildZoneStrings(tznp, locale, alias); | ||
| 201 | if (names != null) { | ||
| 202 | return names; | ||
| 203 | } else { | ||
| 204 | names = examineAliases(tznp, locale, alias, aliases, aliasesSet); | ||
| 205 | if (names != null) { | ||
| 206 | return names; | ||
| 207 | } | ||
| 208 | } | ||
| 209 | } | ||
| 210 | } | ||
| 211 | } | ||
| 212 | |||
| 213 | return null; | ||
| 214 | } | ||
| 215 | |||
| 216 | private static String[] buildZoneStrings(TimeZoneNameProvider tznp, | ||
| 217 | Locale locale, String id) { | ||
| 218 | String[] names = new String[5]; | ||
| 219 | |||
| 220 | for (int i = 1; i <= 4; i ++) { | ||
| 221 | names[i] = tznp.getDisplayName(id, i>=3, i%2, locale); | ||
| 222 | if (i >= 3 && names[i] == null) { | ||
| 223 | names[i] = names[i-2]; | ||
| 224 | } | ||
| 225 | } | ||
| 226 | |||
| 227 | if (names[1] == null) { | ||
| 228 | // this id seems not localized by this provider | ||
| 229 | names = null; | ||
| 230 | } | ||
| 231 | |||
| 232 | return names; | ||
| 233 | } | ||
| 234 | } | ||
| 235 | } | ||