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 |
|
26 /* |
|
27 * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos |
|
28 * |
|
29 * All rights reserved. |
|
30 * |
|
31 * Redistribution and use in source and binary forms, with or without |
|
32 * modification, are permitted provided that the following conditions are met: |
|
33 * |
|
34 * * Redistributions of source code must retain the above copyright notice, |
|
35 * this list of conditions and the following disclaimer. |
|
36 * |
|
37 * * Redistributions in binary form must reproduce the above copyright notice, |
|
38 * this list of conditions and the following disclaimer in the documentation |
|
39 * and/or other materials provided with the distribution. |
|
40 * |
|
41 * * Neither the name of JSR-310 nor the names of its contributors |
|
42 * may be used to endorse or promote products derived from this software |
|
43 * without specific prior written permission. |
|
44 * |
|
45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
|
46 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
|
47 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
|
48 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
|
49 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
|
50 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
|
51 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
|
52 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
|
53 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
|
54 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
55 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
56 */ |
|
57 package java.time.calendar; |
|
58 |
|
59 import java.io.Serializable; |
|
60 import java.time.DateTimeException; |
|
61 import java.time.LocalDate; |
|
62 import java.time.temporal.Chrono; |
|
63 import java.time.temporal.ChronoField; |
|
64 import java.time.temporal.ChronoLocalDate; |
|
65 import java.time.temporal.Era; |
|
66 import java.time.temporal.ISOChrono; |
|
67 import java.time.temporal.TemporalAccessor; |
|
68 import java.time.temporal.ValueRange; |
|
69 import java.time.temporal.Year; |
|
70 import java.util.Arrays; |
|
71 import java.util.Calendar; |
|
72 import java.util.HashMap; |
|
73 import java.util.List; |
|
74 import java.util.Locale; |
|
75 import java.util.Map; |
|
76 |
|
77 import sun.util.calendar.CalendarSystem; |
|
78 import sun.util.calendar.LocalGregorianCalendar; |
|
79 |
|
80 /** |
|
81 * The Japanese Imperial calendar system. |
|
82 * <p> |
|
83 * This chronology defines the rules of the Japanese Imperial calendar system. |
|
84 * This calendar system is primarily used in Japan. |
|
85 * The Japanese Imperial calendar system is the same as the ISO calendar system |
|
86 * apart from the era-based year numbering. |
|
87 * <p> |
|
88 * Only Meiji (1865-04-07 - 1868-09-07) and later eras are supported. |
|
89 * Older eras are handled as an unknown era where the year-of-era is the ISO year. |
|
90 * |
|
91 * <h3>Specification for implementors</h3> |
|
92 * This class is immutable and thread-safe. |
|
93 * |
|
94 * @since 1.8 |
|
95 */ |
|
96 public final class JapaneseChrono extends Chrono<JapaneseChrono> implements Serializable { |
|
97 // TODO: definition for unknown era may break requirement that year-of-era >= 1 |
|
98 |
|
99 static final LocalGregorianCalendar JCAL = |
|
100 (LocalGregorianCalendar) CalendarSystem.forName("japanese"); |
|
101 |
|
102 // Locale for creating a JapaneseImpericalCalendar. |
|
103 static final Locale LOCALE = Locale.forLanguageTag("ja-JP-u-ca-japanese"); |
|
104 |
|
105 /** |
|
106 * Singleton instance for Japanese chronology. |
|
107 */ |
|
108 public static final JapaneseChrono INSTANCE = new JapaneseChrono(); |
|
109 |
|
110 /** |
|
111 * The singleton instance for the before Meiji era ( - 1868-09-07) |
|
112 * which has the value -999. |
|
113 */ |
|
114 public static final Era<JapaneseChrono> ERA_SEIREKI = JapaneseEra.SEIREKI; |
|
115 /** |
|
116 * The singleton instance for the Meiji era (1868-09-08 - 1912-07-29) |
|
117 * which has the value -1. |
|
118 */ |
|
119 public static final Era<JapaneseChrono> ERA_MEIJI = JapaneseEra.MEIJI; |
|
120 /** |
|
121 * The singleton instance for the Taisho era (1912-07-30 - 1926-12-24) |
|
122 * which has the value 0. |
|
123 */ |
|
124 public static final Era<JapaneseChrono> ERA_TAISHO = JapaneseEra.TAISHO; |
|
125 /** |
|
126 * The singleton instance for the Showa era (1926-12-25 - 1989-01-07) |
|
127 * which has the value 1. |
|
128 */ |
|
129 public static final Era<JapaneseChrono> ERA_SHOWA = JapaneseEra.SHOWA; |
|
130 /** |
|
131 * The singleton instance for the Heisei era (1989-01-08 - current) |
|
132 * which has the value 2. |
|
133 */ |
|
134 public static final Era<JapaneseChrono> ERA_HEISEI = JapaneseEra.HEISEI; |
|
135 /** |
|
136 * Serialization version. |
|
137 */ |
|
138 private static final long serialVersionUID = 459996390165777884L; |
|
139 |
|
140 //----------------------------------------------------------------------- |
|
141 /** |
|
142 * Restricted constructor. |
|
143 */ |
|
144 private JapaneseChrono() { |
|
145 } |
|
146 |
|
147 /** |
|
148 * Resolve singleton. |
|
149 * |
|
150 * @return the singleton instance, not null |
|
151 */ |
|
152 private Object readResolve() { |
|
153 return INSTANCE; |
|
154 } |
|
155 |
|
156 //----------------------------------------------------------------------- |
|
157 /** |
|
158 * Gets the ID of the chronology - 'Japanese'. |
|
159 * <p> |
|
160 * The ID uniquely identifies the {@code Chrono}. |
|
161 * It can be used to lookup the {@code Chrono} using {@link #of(String)}. |
|
162 * |
|
163 * @return the chronology ID - 'Japanese' |
|
164 * @see #getCalendarType() |
|
165 */ |
|
166 @Override |
|
167 public String getId() { |
|
168 return "Japanese"; |
|
169 } |
|
170 |
|
171 /** |
|
172 * Gets the calendar type of the underlying calendar system - 'japanese'. |
|
173 * <p> |
|
174 * The calendar type is an identifier defined by the |
|
175 * <em>Unicode Locale Data Markup Language (LDML)</em> specification. |
|
176 * It can be used to lookup the {@code Chrono} using {@link #of(String)}. |
|
177 * It can also be used as part of a locale, accessible via |
|
178 * {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'. |
|
179 * |
|
180 * @return the calendar system type - 'japanese' |
|
181 * @see #getId() |
|
182 */ |
|
183 @Override |
|
184 public String getCalendarType() { |
|
185 return "japanese"; |
|
186 } |
|
187 |
|
188 //----------------------------------------------------------------------- |
|
189 @Override |
|
190 public ChronoLocalDate<JapaneseChrono> date(Era<JapaneseChrono> era, int yearOfEra, int month, int dayOfMonth) { |
|
191 if (era instanceof JapaneseEra == false) { |
|
192 throw new DateTimeException("Era must be JapaneseEra"); |
|
193 } |
|
194 return JapaneseDate.of((JapaneseEra) era, yearOfEra, month, dayOfMonth); |
|
195 } |
|
196 |
|
197 @Override |
|
198 public ChronoLocalDate<JapaneseChrono> date(int prolepticYear, int month, int dayOfMonth) { |
|
199 return new JapaneseDate(LocalDate.of(prolepticYear, month, dayOfMonth)); |
|
200 } |
|
201 |
|
202 @Override |
|
203 public ChronoLocalDate<JapaneseChrono> dateYearDay(int prolepticYear, int dayOfYear) { |
|
204 LocalDate date = LocalDate.ofYearDay(prolepticYear, dayOfYear); |
|
205 return date(prolepticYear, date.getMonthValue(), date.getDayOfMonth()); |
|
206 } |
|
207 |
|
208 @Override |
|
209 public ChronoLocalDate<JapaneseChrono> date(TemporalAccessor temporal) { |
|
210 if (temporal instanceof JapaneseDate) { |
|
211 return (JapaneseDate) temporal; |
|
212 } |
|
213 return new JapaneseDate(LocalDate.from(temporal)); |
|
214 } |
|
215 |
|
216 //----------------------------------------------------------------------- |
|
217 /** |
|
218 * Checks if the specified year is a leap year. |
|
219 * <p> |
|
220 * Japanese calendar leap years occur exactly in line with ISO leap years. |
|
221 * This method does not validate the year passed in, and only has a |
|
222 * well-defined result for years in the supported range. |
|
223 * |
|
224 * @param prolepticYear the proleptic-year to check, not validated for range |
|
225 * @return true if the year is a leap year |
|
226 */ |
|
227 @Override |
|
228 public boolean isLeapYear(long prolepticYear) { |
|
229 return ISOChrono.INSTANCE.isLeapYear(prolepticYear); |
|
230 } |
|
231 |
|
232 @Override |
|
233 public int prolepticYear(Era<JapaneseChrono> era, int yearOfEra) { |
|
234 if (era instanceof JapaneseEra == false) { |
|
235 throw new DateTimeException("Era must be JapaneseEra"); |
|
236 } |
|
237 JapaneseEra jera = (JapaneseEra) era; |
|
238 int gregorianYear = jera.getPrivateEra().getSinceDate().getYear() + yearOfEra - 1; |
|
239 if (yearOfEra == 1) { |
|
240 return gregorianYear; |
|
241 } |
|
242 LocalGregorianCalendar.Date jdate = JCAL.newCalendarDate(null); |
|
243 jdate.setEra(jera.getPrivateEra()).setDate(yearOfEra, 1, 1); |
|
244 JCAL.normalize(jdate); |
|
245 if (jdate.getNormalizedYear() == gregorianYear) { |
|
246 return gregorianYear; |
|
247 } |
|
248 throw new DateTimeException("invalid yearOfEra value"); |
|
249 } |
|
250 |
|
251 /** |
|
252 * Returns the calendar system era object from the given numeric value. |
|
253 * |
|
254 * See the description of each Era for the numeric values of: |
|
255 * {@link #ERA_HEISEI}, {@link #ERA_SHOWA},{@link #ERA_TAISHO}, |
|
256 * {@link #ERA_MEIJI}), only Meiji and later eras are supported. |
|
257 * Prior to Meiji {@link #ERA_SEIREKI} is used. |
|
258 * |
|
259 * @param eraValue the era value |
|
260 * @return the Japanese {@code Era} for the given numeric era value |
|
261 * @throws DateTimeException if {@code eraValue} is invalid |
|
262 */ |
|
263 @Override |
|
264 public Era<JapaneseChrono> eraOf(int eraValue) { |
|
265 return JapaneseEra.of(eraValue); |
|
266 } |
|
267 |
|
268 @Override |
|
269 public List<Era<JapaneseChrono>> eras() { |
|
270 return Arrays.<Era<JapaneseChrono>>asList(JapaneseEra.values()); |
|
271 } |
|
272 |
|
273 //----------------------------------------------------------------------- |
|
274 @Override |
|
275 public ValueRange range(ChronoField field) { |
|
276 switch (field) { |
|
277 case DAY_OF_MONTH: |
|
278 case DAY_OF_WEEK: |
|
279 case MICRO_OF_DAY: |
|
280 case MICRO_OF_SECOND: |
|
281 case HOUR_OF_DAY: |
|
282 case HOUR_OF_AMPM: |
|
283 case MINUTE_OF_DAY: |
|
284 case MINUTE_OF_HOUR: |
|
285 case SECOND_OF_DAY: |
|
286 case SECOND_OF_MINUTE: |
|
287 case MILLI_OF_DAY: |
|
288 case MILLI_OF_SECOND: |
|
289 case NANO_OF_DAY: |
|
290 case NANO_OF_SECOND: |
|
291 case CLOCK_HOUR_OF_DAY: |
|
292 case CLOCK_HOUR_OF_AMPM: |
|
293 case EPOCH_DAY: |
|
294 case EPOCH_MONTH: |
|
295 return field.range(); |
|
296 } |
|
297 Calendar jcal = Calendar.getInstance(LOCALE); |
|
298 int fieldIndex; |
|
299 switch (field) { |
|
300 case ERA: |
|
301 return ValueRange.of(jcal.getMinimum(Calendar.ERA) - JapaneseEra.ERA_OFFSET, |
|
302 jcal.getMaximum(Calendar.ERA) - JapaneseEra.ERA_OFFSET); |
|
303 case YEAR: |
|
304 case YEAR_OF_ERA: |
|
305 return ValueRange.of(Year.MIN_VALUE, jcal.getGreatestMinimum(Calendar.YEAR), |
|
306 jcal.getLeastMaximum(Calendar.YEAR), Year.MAX_VALUE); |
|
307 case MONTH_OF_YEAR: |
|
308 return ValueRange.of(jcal.getMinimum(Calendar.MONTH) + 1, jcal.getGreatestMinimum(Calendar.MONTH) + 1, |
|
309 jcal.getLeastMaximum(Calendar.MONTH) + 1, jcal.getMaximum(Calendar.MONTH) + 1); |
|
310 case DAY_OF_YEAR: |
|
311 fieldIndex = Calendar.DAY_OF_YEAR; |
|
312 break; |
|
313 default: |
|
314 // TODO: review the remaining fields |
|
315 throw new UnsupportedOperationException("Unimplementable field: " + field); |
|
316 } |
|
317 return ValueRange.of(jcal.getMinimum(fieldIndex), jcal.getGreatestMinimum(fieldIndex), |
|
318 jcal.getLeastMaximum(fieldIndex), jcal.getMaximum(fieldIndex)); |
|
319 } |
|
320 |
|
321 } |
|