1 /*
2 * Copyright (c) 2012, 2017, 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.cldr;
27
28 import java.security.AccessController;
29 import java.security.AccessControlException;
30 import java.security.PrivilegedActionException;
31 import java.security.PrivilegedExceptionAction;
32 import java.text.spi.BreakIteratorProvider;
33 import java.text.spi.CollatorProvider;
34 import java.util.Arrays;
35 import java.util.Collections;
36 import java.util.HashSet;
37 import java.util.List;
38 import java.util.Locale;
39 import java.util.Map;
40 import java.util.Objects;
41 import java.util.ServiceLoader;
42 import java.util.ServiceConfigurationError;
43 import java.util.Set;
44 import java.util.StringTokenizer;
45 import java.util.concurrent.ConcurrentHashMap;
46 import sun.util.locale.provider.JRELocaleProviderAdapter;
47 import sun.util.locale.provider.LocaleProviderAdapter;
48 import sun.util.locale.provider.LocaleDataMetaInfo;
49
50 /**
51 * LocaleProviderAdapter implementation for the CLDR locale data.
52 *
53 * @author Masayoshi Okutsu
54 * @author Naoto Sato
55 */
56 public class CLDRLocaleProviderAdapter extends JRELocaleProviderAdapter {
57
58 private static final CLDRBaseLocaleDataMetaInfo baseMetaInfo = new CLDRBaseLocaleDataMetaInfo();
59 // Assumption: CLDR has only one non-Base module.
60 private final LocaleDataMetaInfo nonBaseMetaInfo;
61
62 // parent locales map
63 private static volatile Map<Locale, Locale> parentLocalesMap;
64 static {
65 parentLocalesMap = new ConcurrentHashMap<>();
66 // Assuming these locales do NOT have irregular parent locales.
67 parentLocalesMap.put(Locale.ROOT, Locale.ROOT);
68 parentLocalesMap.put(Locale.ENGLISH, Locale.ENGLISH);
69 parentLocalesMap.put(Locale.US, Locale.US);
70 }
71
72 public CLDRLocaleProviderAdapter() {
73 LocaleDataMetaInfo nbmi = null;
74
75 try {
76 nbmi = AccessController.doPrivileged(new PrivilegedExceptionAction<LocaleDataMetaInfo>() {
77 @Override
78 public LocaleDataMetaInfo run() {
79 for (LocaleDataMetaInfo ldmi : ServiceLoader.loadInstalled(LocaleDataMetaInfo.class)) {
80 if (ldmi.getType() == LocaleProviderAdapter.Type.CLDR) {
81 return ldmi;
82 }
83 }
84 return null;
85 }
86 });
87 } catch (PrivilegedActionException pae) {
88 throw new InternalError(pae.getCause());
89 }
90
91 nonBaseMetaInfo = nbmi;
92 }
93
94 /**
95 * Returns the type of this LocaleProviderAdapter
96 * @return the type of this
97 */
98 @Override
99 public LocaleProviderAdapter.Type getAdapterType() {
100 return LocaleProviderAdapter.Type.CLDR;
101 }
102
103 @Override
104 public BreakIteratorProvider getBreakIteratorProvider() {
105 return null;
106 }
107
108 @Override
109 public CollatorProvider getCollatorProvider() {
110 return null;
111 }
112
113 @Override
114 public Locale[] getAvailableLocales() {
115 Set<String> all = createLanguageTagSet("AvailableLocales");
116 Locale[] locs = new Locale[all.size()];
117 int index = 0;
118 for (String tag : all) {
119 locs[index++] = Locale.forLanguageTag(tag);
120 }
121 return locs;
122 }
123
124 @Override
125 protected Set<String> createLanguageTagSet(String category) {
126 // Directly call Base tags, as we know it's in the base module.
127 String supportedLocaleString = baseMetaInfo.availableLanguageTags(category);
128 String nonBaseTags = null;
129
130 if (nonBaseMetaInfo != null) {
131 nonBaseTags = nonBaseMetaInfo.availableLanguageTags(category);
132 }
133 if (nonBaseTags != null) {
134 if (supportedLocaleString != null) {
135 supportedLocaleString += " " + nonBaseTags;
136 } else {
137 supportedLocaleString = nonBaseTags;
138 }
139 }
140 if (supportedLocaleString == null) {
141 return Collections.emptySet();
142 }
143 Set<String> tagset = new HashSet<>();
144 StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
145 while (tokens.hasMoreTokens()) {
146 tagset.add(tokens.nextToken());
147 }
148 return tagset;
149 }
150
151 // Implementation of ResourceBundleBasedAdapter
152 @Override
153 public List<Locale> getCandidateLocales(String baseName, Locale locale) {
154 List<Locale> candidates = super.getCandidateLocales(baseName, locale);
155 return applyParentLocales(baseName, candidates);
156 }
157
158 private List<Locale> applyParentLocales(String baseName, List<Locale> candidates) {
159 // check irregular parents
160 for (int i = 0; i < candidates.size(); i++) {
161 Locale l = candidates.get(i);
162 if (!l.equals(Locale.ROOT)) {
163 Locale p = getParentLocale(l);
164 if (p != null &&
165 !candidates.get(i+1).equals(p)) {
166 List<Locale> applied = candidates.subList(0, i+1);
167 applied.addAll(applyParentLocales(baseName, super.getCandidateLocales(baseName, p)));
168 return applied;
169 }
170 }
171 }
172
173 return candidates;
174 }
175
176 private static Locale getParentLocale(Locale locale) {
177 Locale parent = parentLocalesMap.get(locale);
178
179 if (parent == null) {
180 String tag = locale.toLanguageTag();
181 for (Map.Entry<Locale, String[]> entry : baseMetaInfo.parentLocales().entrySet()) {
182 if (Arrays.binarySearch(entry.getValue(), tag) >= 0) {
183 parent = entry.getKey();
184 break;
185 }
186 }
187 if (parent == null) {
188 parent = locale; // non existent marker
189 }
190 parentLocalesMap.putIfAbsent(locale, parent);
191 }
192
193 if (locale.equals(parent)) {
194 // means no irregular parent.
195 parent = null;
196 }
197
198 return parent;
199 }
200
201 /**
202 * This method returns equivalent CLDR supported locale for zh-HK,
203 * no, no-NO locales so that COMPAT locales do not precede
204 * those locales during ResourceBundle search path.
205 */
206 private static Locale getEquivalentLoc(Locale locale) {
207 switch (locale.toString()) {
208 case "zh_HK":
209 return Locale.forLanguageTag("zh-Hant-HK");
210 case "no":
211 case "no_NO":
212 return Locale.forLanguageTag("nb");
213 }
214 return locale;
215 }
216
217 @Override
218 public boolean isSupportedProviderLocale(Locale locale, Set<String> langtags) {
219 return Locale.ROOT.equals(locale)
220 || langtags.contains(locale.stripExtensions().toLanguageTag())
221 || langtags.contains(getEquivalentLoc(locale).toLanguageTag());
222 }
223 }