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 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.CalendarDataProvider 39 * CalendarDataProvider} 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 69 // If standalone names are requested and no "standalone." resources are found, 70 // try the default ones instead. 71 if (strings == null && key.indexOf("standalone.") != -1) { 72 key = key.replaceFirst("standalone.", ""); 73 strings = javatime ? lr.getJavaTimeNames(key) : lr.getCalendarNames(key); 74 } 75 76 if (strings != null && strings.length > 0) { 77 if (field == DAY_OF_WEEK || field == YEAR) { 78 --value; 79 } 80 if (value < 0 || value > strings.length) { 81 return null; 82 } else if (value == strings.length) { 83 if (field == ERA && "japanese".equals(calendarType)) { 84 // get the supplemental era, if any, specified through 85 // the property "jdk.calendar.japanese.supplemental.era" 86 // which is always the last element. 87 Era[] jeras = CalendarSystem.forName("japanese").getEras(); 88 if (jeras.length == value) { 89 Era supEra = jeras[value - 1]; // 0-based index 90 if (javatime) { 91 return getBaseStyle(style) == NARROW_FORMAT ? 92 supEra.getAbbreviation() : 93 supEra.getName(); 94 } else { 95 return (style & LONG) != 0 ? 96 supEra.getName() : 97 supEra.getAbbreviation(); 98 } 99 } 100 } 101 return null; 102 } 103 name = strings[value]; 104 // If name is empty in standalone, try its `format' style. 105 if (name.length() == 0 106 && (style == SHORT_STANDALONE || style == LONG_STANDALONE 107 || style == NARROW_STANDALONE)) { 108 name = getDisplayName(calendarType, field, value, 109 getBaseStyle(style), 110 locale); 111 } 112 } 113 } 114 return name; 115 } 116 117 private static int[] REST_OF_STYLES = { 118 SHORT_STANDALONE, LONG_FORMAT, LONG_STANDALONE, 119 NARROW_FORMAT, NARROW_STANDALONE 120 }; 121 122 @Override 123 public Map<String, Integer> getDisplayNames(String calendarType, int field, int style, Locale locale) { 124 Map<String, Integer> names; 125 if (style == ALL_STYLES) { 126 names = getDisplayNamesImpl(calendarType, field, SHORT_FORMAT, locale, false); 127 for (int st : REST_OF_STYLES) { 128 names.putAll(getDisplayNamesImpl(calendarType, field, st, locale, false)); 129 } 130 } else { 131 // specific style 132 names = getDisplayNamesImpl(calendarType, field, style, locale, false); 133 } 134 return names.isEmpty() ? null : names; 135 } 136 137 // NOTE: This method should be used ONLY BY JSR 310 classes. 138 public Map<String, Integer> getJavaTimeDisplayNames(String calendarType, int field, int style, Locale locale) { 139 Map<String, Integer> names; 140 names = getDisplayNamesImpl(calendarType, field, style, locale, true); 141 return names.isEmpty() ? null : names; 142 } 143 144 private Map<String, Integer> getDisplayNamesImpl(String calendarType, int field, 145 int style, Locale locale, boolean javatime) { 146 String key = getResourceKey(calendarType, field, style, javatime); 147 Map<String, Integer> map = new TreeMap<>(LengthBasedComparator.INSTANCE); 148 if (key != null) { 149 LocaleResources lr = LocaleProviderAdapter.forType(type).getLocaleResources(locale); 150 String[] strings = javatime ? lr.getJavaTimeNames(key) : lr.getCalendarNames(key); 151 152 // If standalone names are requested and no "standalone." resources are found, 153 // try the default ones instead. 154 if (strings == null && key.indexOf("standalone.") != -1) { 155 key = key.replaceFirst("standalone.", ""); 156 strings = javatime ? lr.getJavaTimeNames(key) : lr.getCalendarNames(key); 157 } 158 159 if (strings != null) { 160 if (!hasDuplicates(strings)) { 161 if (field == YEAR) { 162 if (strings.length > 0) { 163 map.put(strings[0], 1); 164 } 165 } else { 166 int base = (field == DAY_OF_WEEK) ? 1 : 0; 167 for (int i = 0; i < strings.length; i++) { 168 String name = strings[i]; 169 // Ignore any empty string (some standalone month names 170 // are not defined) 171 if (name.length() == 0) { 172 continue; 173 } 174 map.put(name, base + i); 175 } 176 } 177 } 178 } 179 } 180 return map; 181 } 182 183 private int getBaseStyle(int style) { 184 return style & ~(SHORT_STANDALONE - SHORT_FORMAT); 185 } 186 187 /** 188 * Comparator implementation for TreeMap which iterates keys from longest 189 * to shortest. 190 */ 191 private static class LengthBasedComparator implements Comparator<String> { 192 private static final LengthBasedComparator INSTANCE = new LengthBasedComparator(); 193 194 private LengthBasedComparator() { 195 } 196 197 @Override 198 public int compare(String o1, String o2) { 199 int n = o2.length() - o1.length(); 200 return (n == 0) ? o1.compareTo(o2) : n; 201 } 202 } 203 204 @Override 205 public Locale[] getAvailableLocales() { 206 return LocaleProviderAdapter.toLocaleArray(langtags); 207 } 208 209 @Override 210 public boolean isSupportedLocale(Locale locale) { 211 if (Locale.ROOT.equals(locale)) { 212 return true; 213 } 214 String calendarType = null; 215 if (locale.hasExtensions()) { 216 calendarType = locale.getUnicodeLocaleType("ca"); 217 locale = locale.stripExtensions(); 218 } 219 220 if (calendarType != null) { 221 switch (calendarType) { 222 case "buddhist": 223 case "japanese": 224 case "gregory": 225 case "islamic": 226 case "roc": 227 break; 228 default: 229 // Unknown calendar type 230 return false; 231 } 232 } 233 if (langtags.contains(locale.toLanguageTag())) { 234 return true; 235 } 236 if (type == LocaleProviderAdapter.Type.JRE) { 237 String oldname = locale.toString().replace('_', '-'); 238 return langtags.contains(oldname); 239 } 240 return false; 241 } 242 243 @Override 244 public Set<String> getAvailableLanguageTags() { 245 return langtags; 246 } 247 248 private boolean hasDuplicates(String[] strings) { 249 int len = strings.length; 250 for (int i = 0; i < len - 1; i++) { 251 String a = strings[i]; 252 if (a != null) { 253 for (int j = i + 1; j < len; j++) { 254 if (a.equals(strings[j])) { 255 return true; 256 } 257 } 258 } 259 } 260 return false; 261 } 262 263 private String getResourceKey(String type, int field, int style, boolean javatime) { 264 int baseStyle = getBaseStyle(style); 265 boolean isStandalone = (style != baseStyle); 266 267 if ("gregory".equals(type)) { 268 type = null; 269 } 270 boolean isNarrow = (baseStyle == NARROW_FORMAT); 271 StringBuilder key = new StringBuilder(); 272 // If javatime is true, use prefix "java.time.". 273 if (javatime) { 274 key.append("java.time."); 275 } 276 switch (field) { 277 case ERA: 278 if (type != null) { 279 key.append(type).append('.'); 280 } 281 if (isNarrow) { 282 key.append("narrow."); 283 } else { 284 // JRE and CLDR use different resource key conventions 285 // due to historical reasons. (JRE DateFormatSymbols.getEras returns 286 // abbreviations while other getShort*() return abbreviations.) 287 if (this.type == LocaleProviderAdapter.Type.JRE) { 288 if (javatime) { 289 if (baseStyle == LONG) { 290 key.append("long."); 291 } 292 } 293 if (baseStyle == SHORT) { 294 key.append("short."); 295 } 296 } else { // this.type == LocaleProviderAdapter.Type.CLDR 297 if (baseStyle == LONG) { 298 key.append("long."); 299 } 300 } 301 } 302 key.append("Eras"); 303 break; 304 305 case YEAR: 306 if (!isNarrow) { 307 key.append(type).append(".FirstYear"); 308 } 309 break; 310 311 case MONTH: 312 if ("islamic".equals(type)) { 313 key.append(type).append('.'); 314 } 315 if (isStandalone) { 316 key.append("standalone."); 317 } 318 key.append("Month").append(toStyleName(baseStyle)); 319 break; 320 321 case DAY_OF_WEEK: 322 // support standalone day names 323 if (isStandalone) { 324 key.append("standalone."); 325 } 326 key.append("Day").append(toStyleName(baseStyle)); 327 break; 328 329 case AM_PM: 330 if (isNarrow) { 331 key.append("narrow."); 332 } 333 key.append("AmPmMarkers"); 334 break; 335 } 336 return key.length() > 0 ? key.toString() : null; 337 } 338 339 private String toStyleName(int baseStyle) { 340 switch (baseStyle) { 341 case SHORT: 342 return "Abbreviations"; 343 case NARROW_FORMAT: 344 return "Narrows"; 345 } 346 return "Names"; 347 } 348 }