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 String name = null; 54 String key = getResourceKey(calendarType, field, style); 55 if (key != null) { 56 String[] strings = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCalendarNames(key); 57 if (strings != null && strings.length > 0) { 58 if (field == DAY_OF_WEEK || field == YEAR) { 59 --value; 60 } 61 name = strings[value]; 62 // If name is empty in standalone, try its `format' style. 63 if (name.length() == 0 64 && (style == SHORT_STANDALONE || style == LONG_STANDALONE 65 || style == NARROW_STANDALONE)) { 66 name = getDisplayName(calendarType, field, value, 67 getBaseStyle(style), 68 locale); 69 } 70 } 71 } 72 return name; 73 } 74 75 private static int[] REST_OF_STYLES = { 76 SHORT_STANDALONE, LONG_FORMAT, LONG_STANDALONE, 77 NARROW_FORMAT, NARROW_STANDALONE 78 }; 79 @Override 80 public Map<String, Integer> getDisplayNames(String calendarType, int field, int style, Locale locale) { 81 Map<String, Integer> names; 82 if (style == ALL_STYLES) { 83 names = getDisplayNamesImpl(calendarType, field, SHORT_FORMAT, locale); 84 for (int st : REST_OF_STYLES) { 85 names.putAll(getDisplayNamesImpl(calendarType, field, st, locale)); 86 } 87 } else { 88 // specific style 89 names = getDisplayNamesImpl(calendarType, field, style, locale); 90 } 91 return names.isEmpty() ? null : names; 92 } 93 94 private Map<String, Integer> getDisplayNamesImpl(String calendarType, int field, 95 int style, Locale locale) { 96 String key = getResourceKey(calendarType, field, style); 97 Map<String, Integer> map = new TreeMap<>(LengthBasedComparator.INSTANCE); 98 if (key != null) { 99 String[] strings = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCalendarNames(key); 100 if (strings != null) { 101 if (!hasDuplicates(strings)) { 102 if (field == YEAR) { 103 if (strings.length > 0) { 104 map.put(strings[0], 1); 105 } 106 } else { 107 int base = (field == DAY_OF_WEEK) ? 1 : 0; 108 for (int i = 0; i < strings.length; i++) { 109 String name = strings[i]; 110 // Ignore any empty string (some standalone month names 111 // are not defined) 112 if (name.length() == 0) { 113 continue; 114 } 115 map.put(name, base + i); 116 } 117 } 118 } 119 } 120 } 121 return map; 122 } 123 124 private int getBaseStyle(int style) { 125 return style & ~(SHORT_STANDALONE - SHORT_FORMAT); 126 } 127 128 /** 129 * Comparator implementation for TreeMap which iterates keys from longest 130 * to shortest. 131 */ 132 private static class LengthBasedComparator implements Comparator<String> { 133 private static final LengthBasedComparator INSTANCE = new LengthBasedComparator(); 134 135 private LengthBasedComparator() { 136 } 137 138 @Override 139 public int compare(String o1, String o2) { 140 int n = o2.length() - o1.length(); 141 return (n == 0) ? o1.compareTo(o2) : n; 142 } 143 } 144 145 @Override 146 public Locale[] getAvailableLocales() { 147 return LocaleProviderAdapter.toLocaleArray(langtags); 148 } 149 150 @Override 151 public boolean isSupportedLocale(Locale locale) { 152 if (Locale.ROOT.equals(locale)) { 153 return true; 154 } 155 String calendarType = null; 156 if (locale.hasExtensions()) { 157 calendarType = locale.getUnicodeLocaleType("ca"); 158 locale = locale.stripExtensions(); 159 } 160 161 if (calendarType != null) { 162 switch (calendarType) { 163 case "buddhist": 164 case "japanese": 165 case "gregory": 166 case "islamic": 167 case "roc": 168 break; 169 default: 170 // Unknown calendar type 171 return false; 172 } 173 } 174 if (langtags.contains(locale.toLanguageTag())) { 175 return true; 176 } 177 if (type == LocaleProviderAdapter.Type.JRE) { 178 String oldname = locale.toString().replace('_', '-'); 179 return langtags.contains(oldname); 180 } 181 return false; 182 } 183 184 @Override 185 public Set<String> getAvailableLanguageTags() { 186 return langtags; 187 } 188 189 private boolean hasDuplicates(String[] strings) { 190 int len = strings.length; 191 for (int i = 0; i < len - 1; i++) { 192 String a = strings[i]; 193 if (a != null) { 194 for (int j = i + 1; j < len; j++) { 195 if (a.equals(strings[j])) { 196 return true; 197 } 198 } 199 } 200 } 201 return false; 202 } 203 204 private String getResourceKey(String type, int field, int style) { 205 int baseStyle = getBaseStyle(style); 206 boolean isStandalone = (style != baseStyle); 207 208 if ("gregory".equals(type)) { 209 type = null; 210 } 211 boolean isNarrow = (baseStyle == NARROW_FORMAT); 212 StringBuilder key = new StringBuilder(); 213 switch (field) { 214 case ERA: 215 if (type != null) { 216 key.append(type).append('.'); 217 } 218 if (isNarrow) { 219 key.append("narrow."); 220 } else { 221 // JRE and CLDR use different resource key conventions 222 // due to historical reasons. (JRE DateFormatSymbols.getEras returns 223 // abbreviations while other getShort*() return abbreviations.) 224 if (this.type == LocaleProviderAdapter.Type.JRE) { 225 if (baseStyle == SHORT) { 226 key.append("short."); 227 } 228 } else { // CLDR 229 if (baseStyle == LONG) { 230 key.append("long."); 231 } 232 } 233 } 234 key.append("Eras"); 235 break; 236 237 case YEAR: 238 if (!isNarrow) { 239 key.append(type).append(".FirstYear"); 240 } 241 break; 242 243 case MONTH: 244 if ("islamic".equals(type)) { 245 key.append(type).append('.'); 246 } 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 }