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