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