1 /* 2 * Copyright (c) 2012, 2019, 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 import sun.util.calendar.CalendarSystem; 35 import sun.util.calendar.Era; 36 37 /** 38 * Concrete implementation of the {@link java.util.spi.CalendarNameProvider 39 * CalendarNameProvider} class for the JRE LocaleProviderAdapter. 40 * 41 * @author Masayoshi Okutsu 42 * @author Naoto Sato 43 */ 44 public class CalendarNameProviderImpl extends CalendarNameProvider implements AvailableLanguageTags { 45 private final LocaleProviderAdapter.Type type; 46 private final Set<String> langtags; 47 48 public CalendarNameProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) { 49 this.type = type; 50 this.langtags = langtags; 51 } 52 53 @Override 54 public String getDisplayName(String calendarType, int field, int value, int style, Locale locale) { 55 return getDisplayNameImpl(calendarType, field, value, style, locale, false); 56 } 57 58 public String getJavaTimeDisplayName(String calendarType, int field, int value, int style, Locale locale) { 59 return getDisplayNameImpl(calendarType, field, value, style, locale, true); 60 } 61 62 public String getDisplayNameImpl(String calendarType, int field, int value, int style, Locale locale, boolean javatime) { 63 String name = null; 64 String key = getResourceKey(calendarType, field, style, javatime); 65 if (key != null) { 66 LocaleResources lr = LocaleProviderAdapter.forType(type).getLocaleResources(locale); 67 String[] strings = javatime ? lr.getJavaTimeNames(key) : lr.getCalendarNames(key); 68 if (strings != null && strings.length > 0) { 69 if (field == DAY_OF_WEEK || field == YEAR) { 70 --value; 71 } 72 if (value < 0) { 73 return null; 74 } else if (value >= strings.length) { 75 if (field == ERA && "japanese".equals(calendarType)) { 76 Era[] jeras = CalendarSystem.forName("japanese").getEras(); 77 if (value <= jeras.length) { 78 // Localized era name could not be retrieved from this provider. 79 // This can occur either for NewEra or SupEra. 80 // 81 // If it's CLDR provider, try COMPAT first, which is guaranteed to have 82 // the name for NewEra. 83 if (type == LocaleProviderAdapter.Type.CLDR) { 84 lr = LocaleProviderAdapter.forJRE().getLocaleResources(locale); 85 key = getResourceKeyFor(LocaleProviderAdapter.Type.JRE, 86 calendarType, field, style, javatime); 87 strings = 88 javatime ? lr.getJavaTimeNames(key) : lr.getCalendarNames(key); 89 } 90 if (strings == null || value >= strings.length) { 91 // Get the default name for SupEra 92 Era supEra = jeras[value - 1]; // 0-based index 93 if (javatime) { 94 return getBaseStyle(style) == NARROW_FORMAT ? 95 supEra.getAbbreviation() : 96 supEra.getName(); 97 } else { 98 return (style & LONG) != 0 ? 99 supEra.getName() : 100 supEra.getAbbreviation(); 101 } 102 } 103 } else { 104 return null; 105 } 106 } else { 107 return null; 108 } 109 } 110 name = strings[value]; 111 // If name is empty in standalone, try its `format' style. 112 if (name.length() == 0 113 && (style == SHORT_STANDALONE || style == LONG_STANDALONE 114 || style == NARROW_STANDALONE)) { 115 name = getDisplayName(calendarType, field, value, 116 getBaseStyle(style), 117 locale); 118 } 119 } 120 } 121 return name; 122 } 123 124 private static int[] REST_OF_STYLES = { 125 SHORT_STANDALONE, LONG_FORMAT, LONG_STANDALONE, 126 NARROW_FORMAT, NARROW_STANDALONE 127 }; 128 129 @Override 130 public Map<String, Integer> getDisplayNames(String calendarType, int field, int style, Locale locale) { 131 Map<String, Integer> names; 132 if (style == ALL_STYLES) { 133 names = getDisplayNamesImpl(calendarType, field, SHORT_FORMAT, locale, false); 134 for (int st : REST_OF_STYLES) { 135 names.putAll(getDisplayNamesImpl(calendarType, field, st, locale, false)); 136 } 137 } else { 138 // specific style 139 names = getDisplayNamesImpl(calendarType, field, style, locale, false); 140 } 141 return names.isEmpty() ? null : names; 142 } 143 144 // NOTE: This method should be used ONLY BY JSR 310 classes. 145 public Map<String, Integer> getJavaTimeDisplayNames(String calendarType, int field, int style, Locale locale) { 146 Map<String, Integer> names; 147 names = getDisplayNamesImpl(calendarType, field, style, locale, true); 148 return names.isEmpty() ? null : names; 149 } 150 151 private Map<String, Integer> getDisplayNamesImpl(String calendarType, int field, 152 int style, Locale locale, boolean javatime) { 153 String key = getResourceKey(calendarType, field, style, javatime); 154 Map<String, Integer> map = new TreeMap<>(LengthBasedComparator.INSTANCE); 155 if (key != null) { 156 LocaleResources lr = LocaleProviderAdapter.forType(type).getLocaleResources(locale); 157 String[] strings = javatime ? lr.getJavaTimeNames(key) : lr.getCalendarNames(key); 158 if (strings != null) { 159 if (!hasDuplicates(strings)) { 160 if (field == YEAR) { 161 if (strings.length > 0) { 162 map.put(strings[0], 1); 163 } 164 } else { 165 int base = (field == DAY_OF_WEEK) ? 1 : 0; 166 for (int i = 0; i < strings.length; i++) { 167 String name = strings[i]; 168 // Ignore any empty string (some standalone month names 169 // are not defined) 170 if (name.length() == 0) { 171 continue; 172 } 173 map.put(name, base + i); 174 } 175 } 176 } 177 } 178 } 179 return map; 180 } 181 182 private static int getBaseStyle(int style) { 183 return style & ~(SHORT_STANDALONE - SHORT_FORMAT); 184 } 185 186 /** 187 * Comparator implementation for TreeMap which iterates keys from longest 188 * to shortest. 189 */ 190 private static class LengthBasedComparator implements Comparator<String> { 191 private static final LengthBasedComparator INSTANCE = new LengthBasedComparator(); 192 193 private LengthBasedComparator() { 194 } 195 196 @Override 197 public int compare(String o1, String o2) { 198 int n = o2.length() - o1.length(); 199 return (n == 0) ? o1.compareTo(o2) : n; 200 } 201 } 202 203 @Override 204 public Locale[] getAvailableLocales() { 205 return LocaleProviderAdapter.toLocaleArray(langtags); 206 } 207 208 @Override 209 public boolean isSupportedLocale(Locale locale) { 210 if (Locale.ROOT.equals(locale)) { 211 return true; 212 } 213 String calendarType = null; 214 if (locale.hasExtensions()) { 215 calendarType = locale.getUnicodeLocaleType("ca"); 216 locale = locale.stripExtensions(); 217 } 218 219 if (calendarType != null) { 220 switch (calendarType) { 221 case "buddhist": 222 case "japanese": 223 case "gregory": 224 case "islamic": 225 case "roc": 226 break; 227 default: 228 // Unknown calendar type 229 return false; 230 } 231 } 232 if (langtags.contains(locale.toLanguageTag())) { 233 return true; 234 } 235 if (type == LocaleProviderAdapter.Type.JRE) { 236 String oldname = locale.toString().replace('_', '-'); 237 return langtags.contains(oldname); 238 } 239 return false; 240 } 241 242 @Override 243 public Set<String> getAvailableLanguageTags() { 244 return langtags; 245 } 246 247 private boolean hasDuplicates(String[] strings) { 248 int len = strings.length; 249 for (int i = 0; i < len - 1; i++) { 250 String a = strings[i]; 251 if (a != null) { 252 for (int j = i + 1; j < len; j++) { 253 if (a.equals(strings[j])) { 254 return true; 255 } 256 } 257 } 258 } 259 return false; 260 } 261 262 private String getResourceKey(String type, int field, int style, boolean javatime) { 263 return getResourceKeyFor(this.type, type, field, style, javatime); 264 } 265 266 private static String getResourceKeyFor(LocaleProviderAdapter.Type adapterType, 267 String type, int field, int style, boolean javatime) { 268 int baseStyle = getBaseStyle(style); 269 boolean isStandalone = (style != baseStyle); 270 271 if ("gregory".equals(type)) { 272 type = null; 273 } 274 boolean isNarrow = (baseStyle == NARROW_FORMAT); 275 StringBuilder key = new StringBuilder(); 276 // If javatime is true, use prefix "java.time.". 277 if (javatime) { 278 key.append("java.time."); 279 } 280 switch (field) { 281 case ERA: 282 if (type != null) { 283 key.append(type).append('.'); 284 } 285 if (isNarrow) { 286 key.append("narrow."); 287 } else { 288 // JRE and CLDR use different resource key conventions 289 // due to historical reasons. (JRE DateFormatSymbols.getEras returns 290 // abbreviations while other getShort*() return abbreviations.) 291 if (adapterType == LocaleProviderAdapter.Type.JRE) { 292 if (javatime) { 293 if (baseStyle == LONG) { 294 key.append("long."); 295 } 296 } 297 if (baseStyle == SHORT) { 298 key.append("short."); 299 } 300 } else { // this.type == LocaleProviderAdapter.Type.CLDR 301 if (baseStyle == LONG) { 302 key.append("long."); 303 } 304 } 305 } 306 key.append("Eras"); 307 break; 308 309 case YEAR: 310 if (!isNarrow) { 311 key.append(type).append(".FirstYear"); 312 } 313 break; 314 315 case MONTH: 316 if ("islamic".equals(type)) { 317 key.append(type).append('.'); 318 } 319 if (isStandalone) { 320 key.append("standalone."); 321 } 322 key.append("Month").append(toStyleName(baseStyle)); 323 break; 324 325 case DAY_OF_WEEK: 326 // support standalone narrow day names 327 if (isStandalone && isNarrow) { 328 key.append("standalone."); 329 } 330 key.append("Day").append(toStyleName(baseStyle)); 331 break; 332 333 case AM_PM: 334 if (isNarrow) { 335 key.append("narrow."); 336 } 337 key.append("AmPmMarkers"); 338 break; 339 } 340 return key.length() > 0 ? key.toString() : null; 341 } 342 343 private static String toStyleName(int baseStyle) { 344 switch (baseStyle) { 345 case SHORT: 346 return "Abbreviations"; 347 case NARROW_FORMAT: 348 return "Narrows"; 349 } 350 return "Names"; 351 } 352 }