1 /*
2 * Copyright (c) 2012, 2013, 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 package sun.util.locale.provider;
26
27 import static java.util.Calendar.*;
28 import java.util.Comparator;
29 import java.util.Locale;
30 import java.util.Map;
31 import java.util.Set;
32 import java.util.TreeMap;
33 import java.util.spi.CalendarNameProvider;
34
35 /**
36 * Concrete implementation of the {@link java.util.spi.CalendarDataProvider
37 * CalendarDataProvider} class for the JRE LocaleProviderAdapter.
38 *
39 * @author Masayoshi Okutsu
40 * @author Naoto Sato
41 */
42 public class CalendarNameProviderImpl extends CalendarNameProvider implements AvailableLanguageTags {
43 private final LocaleProviderAdapter.Type type;
44 private final Set<String> langtags;
45
46 public CalendarNameProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
47 this.type = type;
48 this.langtags = langtags;
49 }
50
51 @Override
52 public String getDisplayName(String calendarType, int field, int value, int style, Locale locale) {
53 return getDisplayNameImpl(calendarType, field, value, style, locale, false);
54 }
55
56 public String getCldrDisplayName(String calendarType, int field, int value, int style, Locale locale) {
57 return getDisplayNameImpl(calendarType, field, value, style, locale, true);
58 }
59
60 public String getDisplayNameImpl(String calendarType, int field, int value, int style, Locale locale, boolean cldr) {
61 String name = null;
62 String key = getResourceKey(calendarType, field, style, cldr);
63 if (key != null) {
64 String[] strings = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCalendarNames(key);
65 if (strings != null && strings.length > 0) {
66 if (field == DAY_OF_WEEK || field == YEAR) {
67 --value;
68 }
69 if (value < 0 || value >= strings.length) {
70 return null;
71 }
72 name = strings[value];
73 // If name is empty in standalone, try its `format' style.
74 if (name.length() == 0
75 && (style == SHORT_STANDALONE || style == LONG_STANDALONE
76 || style == NARROW_STANDALONE)) {
77 name = getDisplayName(calendarType, field, value,
78 getBaseStyle(style),
79 locale);
80 }
81 }
82 }
83 return name;
84 }
85
86 private static int[] REST_OF_STYLES = {
87 SHORT_STANDALONE, LONG_FORMAT, LONG_STANDALONE,
88 NARROW_FORMAT, NARROW_STANDALONE
89 };
90
91 @Override
92 public Map<String, Integer> getDisplayNames(String calendarType, int field, int style, Locale locale) {
93 Map<String, Integer> names;
94 if (style == ALL_STYLES) {
95 names = getDisplayNamesImpl(calendarType, field, SHORT_FORMAT, locale, false);
96 for (int st : REST_OF_STYLES) {
97 names.putAll(getDisplayNamesImpl(calendarType, field, st, locale, false));
98 }
99 } else {
100 // specific style
101 names = getDisplayNamesImpl(calendarType, field, style, locale, false);
102 }
103 return names.isEmpty() ? null : names;
104 }
105
106 // NOTE: This method should be used ONLY BY JSR 310 classes.
107 public Map<String, Integer> getCldrDisplayNames(String calendarType, int field, int style, Locale locale) {
108 Map<String, Integer> names;
109 names = getDisplayNamesImpl(calendarType, field, style, locale, true);
110 return names.isEmpty() ? null : names;
111 }
112
113 private Map<String, Integer> getDisplayNamesImpl(String calendarType, int field,
114 int style, Locale locale, boolean cldr) {
115 String key = getResourceKey(calendarType, field, style, cldr);
116 Map<String, Integer> map = new TreeMap<>(LengthBasedComparator.INSTANCE);
117 if (key != null) {
118 String[] strings = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCalendarNames(key);
119 if (strings != null) {
120 if (!hasDuplicates(strings)) {
121 if (field == YEAR) {
122 if (strings.length > 0) {
123 map.put(strings[0], 1);
124 }
125 } else {
126 int base = (field == DAY_OF_WEEK) ? 1 : 0;
127 for (int i = 0; i < strings.length; i++) {
128 String name = strings[i];
129 // Ignore any empty string (some standalone month names
130 // are not defined)
131 if (name.length() == 0) {
132 continue;
133 }
134 map.put(name, base + i);
135 }
136 }
137 }
138 }
139 }
140 return map;
141 }
142
143 private int getBaseStyle(int style) {
144 return style & ~(SHORT_STANDALONE - SHORT_FORMAT);
145 }
146
147 /**
148 * Comparator implementation for TreeMap which iterates keys from longest
149 * to shortest.
150 */
151 private static class LengthBasedComparator implements Comparator<String> {
152 private static final LengthBasedComparator INSTANCE = new LengthBasedComparator();
153
154 private LengthBasedComparator() {
155 }
156
157 @Override
158 public int compare(String o1, String o2) {
159 int n = o2.length() - o1.length();
160 return (n == 0) ? o1.compareTo(o2) : n;
161 }
162 }
163
164 @Override
165 public Locale[] getAvailableLocales() {
166 return LocaleProviderAdapter.toLocaleArray(langtags);
167 }
168
169 @Override
170 public boolean isSupportedLocale(Locale locale) {
171 if (Locale.ROOT.equals(locale)) {
172 return true;
173 }
174 String calendarType = null;
175 if (locale.hasExtensions()) {
176 calendarType = locale.getUnicodeLocaleType("ca");
177 locale = locale.stripExtensions();
178 }
179
180 if (calendarType != null) {
181 switch (calendarType) {
182 case "buddhist":
183 case "japanese":
184 case "gregory":
185 case "islamic":
186 case "roc":
187 break;
188 default:
189 // Unknown calendar type
190 return false;
191 }
192 }
193 if (langtags.contains(locale.toLanguageTag())) {
194 return true;
195 }
196 if (type == LocaleProviderAdapter.Type.JRE) {
197 String oldname = locale.toString().replace('_', '-');
198 return langtags.contains(oldname);
199 }
200 return false;
201 }
202
203 @Override
204 public Set<String> getAvailableLanguageTags() {
205 return langtags;
206 }
207
208 private boolean hasDuplicates(String[] strings) {
209 int len = strings.length;
210 for (int i = 0; i < len - 1; i++) {
211 String a = strings[i];
212 if (a != null) {
213 for (int j = i + 1; j < len; j++) {
214 if (a.equals(strings[j])) {
215 return true;
216 }
217 }
218 }
219 }
220 return false;
221 }
222
223 private String getResourceKey(String type, int field, int style, boolean cldr) {
224 int baseStyle = getBaseStyle(style);
225 boolean isStandalone = (style != baseStyle);
226
227 if ("gregory".equals(type)) {
228 type = null;
229 }
230 boolean isNarrow = (baseStyle == NARROW_FORMAT);
231 StringBuilder key = new StringBuilder();
232 // If cldr is true, use prefix "cldr.".
233 if (cldr) {
234 key.append("cldr.");
235 }
236 switch (field) {
237 case ERA:
238 if (type != null) {
239 key.append(type).append('.');
240 }
241 if (isNarrow) {
242 key.append("narrow.");
243 } else {
244 // JRE and CLDR use different resource key conventions
245 // due to historical reasons. (JRE DateFormatSymbols.getEras returns
246 // abbreviations while other getShort*() return abbreviations.)
247 if (this.type == LocaleProviderAdapter.Type.JRE) {
248 if (cldr) {
249 if (baseStyle == LONG) {
250 key.append("long.");
251 }
252 }
253 if (baseStyle == SHORT) {
254 key.append("short.");
255 }
256 } else { // CLDR
257 if (baseStyle == LONG) {
258 key.append("long.");
259 }
260 }
261 }
262 key.append("Eras");
263 break;
264
265 case YEAR:
266 if (!isNarrow) {
267 key.append(type).append(".FirstYear");
268 }
269 break;
270
271 case MONTH:
272 if ("islamic".equals(type)) {
273 key.append(type).append('.');
274 }
275 if (isStandalone) {
276 key.append("standalone.");
277 }
278 key.append("Month").append(toStyleName(baseStyle));
279 break;
280
281 case DAY_OF_WEEK:
282 // support standalone narrow day names
283 if (isStandalone && isNarrow) {
284 key.append("standalone.");
285 }
286 key.append("Day").append(toStyleName(baseStyle));
287 break;
288
289 case AM_PM:
290 if (isNarrow) {
291 key.append("narrow.");
292 }
293 key.append("AmPmMarkers");
294 break;
295 }
296 return key.length() > 0 ? key.toString() : null;
297 }
298
299 private String toStyleName(int baseStyle) {
300 switch (baseStyle) {
301 case SHORT:
302 return "Abbreviations";
303 case NARROW_FORMAT:
304 return "Narrows";
305 }
306 return "Names";
307 }
308 }