1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /* 26 * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos 27 * 28 * All rights reserved. 29 * 30 * Redistribution and use in source and binary forms, with or without 31 * modification, are permitted provided that the following conditions are met: 32 * 33 * * Redistributions of source code must retain the above copyright notice, 34 * this list of conditions and the following disclaimer. 35 * 36 * * Redistributions in binary form must reproduce the above copyright notice, 37 * this list of conditions and the following disclaimer in the documentation 38 * and/or other materials provided with the distribution. 39 * 40 * * Neither the name of JSR-310 nor the names of its contributors 41 * may be used to endorse or promote products derived from this software 42 * without specific prior written permission. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 45 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 46 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 47 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 48 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 49 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 50 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 51 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 52 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 53 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 54 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 package tck.java.time.chrono; 57 58 import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH; 59 import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR; 60 import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_MONTH; 61 import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR; 62 import static java.time.temporal.ChronoField.DAY_OF_MONTH; 63 import static java.time.temporal.ChronoField.MONTH_OF_YEAR; 64 import static java.time.temporal.ChronoField.YEAR_OF_ERA; 65 66 import java.io.Serializable; 67 68 import java.time.DateTimeException; 69 import java.time.LocalDate; 70 import java.time.Period; 71 import java.time.Year; 72 import java.time.chrono.ChronoLocalDate; 73 import java.time.temporal.ChronoField; 74 import java.time.temporal.ChronoUnit; 75 import java.time.temporal.Temporal; 76 import java.time.temporal.TemporalField; 77 import java.time.temporal.TemporalUnit; 78 import java.time.temporal.ValueRange; 79 import java.time.temporal.UnsupportedTemporalTypeException; 80 81 /** 82 * A date in the Coptic calendar system. 83 * <p> 84 * This implements {@code ChronoLocalDate} for the {@link CopticChronology Coptic calendar}. 85 * 86 * <h4>Implementation notes</h4> 87 * This class is immutable and thread-safe. 88 */ 89 public final class CopticDate 90 implements ChronoLocalDate<CopticDate>, Serializable { 91 92 /** 93 * Serialization version. 94 */ 95 private static final long serialVersionUID = -7920528871688876868L; 96 /** 97 * The difference between the Coptic and Coptic epoch day count. 98 */ 99 private static final int EPOCH_DAY_DIFFERENCE = 574971 + 40587; 100 101 /** 102 * The proleptic year. 103 */ 104 private final int prolepticYear; 105 /** 106 * The month. 107 */ 108 private final short month; 109 /** 110 * The day. 111 */ 112 private final short day; 113 114 //----------------------------------------------------------------------- 115 /** 116 * Creates an instance. 117 * 118 * @param epochDay the epoch day to convert based on 1970-01-01 (ISO) 119 * @return the Coptic date, not null 120 * @throws DateTimeException if the date is invalid 121 */ 122 static CopticDate ofEpochDay(long epochDay) { 123 epochDay += EPOCH_DAY_DIFFERENCE; 124 int prolepticYear = (int) (((epochDay * 4) + 1463) / 1461); 125 int startYearEpochDay = (prolepticYear - 1) * 365 + (prolepticYear / 4); 126 int doy0 = (int) (epochDay - startYearEpochDay); 127 int month = doy0 / 30 + 1; 128 int dom = doy0 % 30 + 1; 129 return new CopticDate(prolepticYear, month, dom); 130 } 131 132 private static CopticDate resolvePreviousValid(int prolepticYear, int month, int day) { 133 if (month == 13 && day > 5) { 134 day = CopticChronology.INSTANCE.isLeapYear(prolepticYear) ? 6 : 5; 135 } 136 return new CopticDate(prolepticYear, month, day); 137 } 138 139 //----------------------------------------------------------------------- 140 /** 141 * Creates an instance. 142 * 143 * @param prolepticYear the Coptic proleptic-year 144 * @param month the Coptic month, from 1 to 13 145 * @param dayOfMonth the Coptic day-of-month, from 1 to 30 146 * @throws DateTimeException if the date is invalid 147 */ 148 CopticDate(int prolepticYear, int month, int dayOfMonth) { 149 CopticChronology.MOY_RANGE.checkValidValue(month, MONTH_OF_YEAR); 150 ValueRange range; 151 if (month == 13) { 152 range = CopticChronology.INSTANCE.isLeapYear(prolepticYear) ? CopticChronology.DOM_RANGE_LEAP : CopticChronology.DOM_RANGE_NONLEAP; 153 } else { 154 range = CopticChronology.DOM_RANGE; 155 } 156 range.checkValidValue(dayOfMonth, DAY_OF_MONTH); 157 158 this.prolepticYear = prolepticYear; 159 this.month = (short) month; 160 this.day = (short) dayOfMonth; 161 } 162 163 /** 164 * Validates the object. 165 * 166 * @return the resolved date, not null 167 */ 168 private Object readResolve() { 169 // TODO: validate 170 return this; 171 } 172 173 //----------------------------------------------------------------------- 174 @Override 175 public CopticChronology getChronology() { 176 return CopticChronology.INSTANCE; 177 } 178 179 //----------------------------------------------------------------------- 180 @Override 181 public int lengthOfMonth() { 182 switch (month) { 183 case 13: 184 return (isLeapYear() ? 6 : 5); 185 default: 186 return 30; 187 } 188 } 189 190 @Override 191 public ValueRange range(TemporalField field) { 192 if (field instanceof ChronoField) { 193 if (isSupported(field)) { 194 ChronoField f = (ChronoField) field; 195 switch (f) { 196 case DAY_OF_MONTH: return ValueRange.of(1, lengthOfMonth()); 197 case DAY_OF_YEAR: return ValueRange.of(1, lengthOfYear()); 198 case ALIGNED_WEEK_OF_MONTH: return ValueRange.of(1, month == 13 ? 1 : 5); 199 case YEAR: 200 case YEAR_OF_ERA: return (prolepticYear <= 0 ? 201 ValueRange.of(1, Year.MAX_VALUE + 1) : ValueRange.of(1, Year.MAX_VALUE)); // TODO 202 } 203 return getChronology().range(f); 204 } 205 throw new UnsupportedTemporalTypeException("Unsupported field: " + field.getName()); 206 } 207 return field.rangeRefinedBy(this); 208 } 209 210 @Override 211 public long getLong(TemporalField field) { 212 if (field instanceof ChronoField) { 213 switch ((ChronoField) field) { 214 case DAY_OF_WEEK: return Math.floorMod(toEpochDay() + 3, 7) + 1; 215 case ALIGNED_DAY_OF_WEEK_IN_MONTH: return ((day - 1) % 7) + 1; 216 case ALIGNED_DAY_OF_WEEK_IN_YEAR: return ((get(ChronoField.DAY_OF_YEAR) - 1) % 7) + 1; 217 case DAY_OF_MONTH: return day; 218 case DAY_OF_YEAR: return (month - 1) * 30 + day; 219 case EPOCH_DAY: return toEpochDay(); 220 case ALIGNED_WEEK_OF_MONTH: return ((day - 1) / 7) + 1; 221 case ALIGNED_WEEK_OF_YEAR: return ((get(ChronoField.DAY_OF_YEAR) - 1) / 7) + 1; 222 case MONTH_OF_YEAR: return month; 223 case YEAR_OF_ERA: return (prolepticYear >= 1 ? prolepticYear : 1 - prolepticYear); 224 case YEAR: return prolepticYear; 225 case ERA: return (prolepticYear >= 1 ? 1 : 0); 226 } 227 throw new UnsupportedTemporalTypeException("Unsupported field: " + field.getName()); 228 } 229 return field.getFrom(this); 230 } 231 232 @Override 233 public CopticDate with(TemporalField field, long newValue) { 234 if (field instanceof ChronoField) { 235 ChronoField f = (ChronoField) field; 236 f.checkValidValue(newValue); // TODO: validate value 237 int nvalue = (int) newValue; 238 switch (f) { 239 case DAY_OF_WEEK: return plusDays(newValue - get(ChronoField.DAY_OF_WEEK)); 240 case ALIGNED_DAY_OF_WEEK_IN_MONTH: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_MONTH)); 241 case ALIGNED_DAY_OF_WEEK_IN_YEAR: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_YEAR)); 242 case DAY_OF_MONTH: return resolvePreviousValid(prolepticYear, month, nvalue); 243 case DAY_OF_YEAR: return resolvePreviousValid(prolepticYear, ((nvalue - 1) / 30) + 1, ((nvalue - 1) % 30) + 1); 244 case EPOCH_DAY: return ofEpochDay(nvalue); 245 case ALIGNED_WEEK_OF_MONTH: return plusDays((newValue - getLong(ALIGNED_WEEK_OF_MONTH)) * 7); 246 case ALIGNED_WEEK_OF_YEAR: return plusDays((newValue - getLong(ALIGNED_WEEK_OF_YEAR)) * 7); 247 case MONTH_OF_YEAR: return resolvePreviousValid(prolepticYear, nvalue, day); 248 case YEAR_OF_ERA: return resolvePreviousValid(prolepticYear >= 1 ? nvalue : 1 - nvalue, month, day); 249 case YEAR: return resolvePreviousValid(nvalue, month, day); 250 case ERA: return resolvePreviousValid(1 - prolepticYear, month, day); 251 } 252 throw new UnsupportedTemporalTypeException("Unsupported field: " + field.getName()); 253 } 254 return field.adjustInto(this, newValue); 255 } 256 257 //----------------------------------------------------------------------- 258 @Override 259 public CopticDate plus(long amountToAdd, TemporalUnit unit) { 260 if (unit instanceof ChronoUnit) { 261 ChronoUnit f = (ChronoUnit) unit; 262 switch (f) { 263 case DAYS: return plusDays(amountToAdd); 264 case WEEKS: return plusDays(Math.multiplyExact(amountToAdd, 7)); 265 case MONTHS: return plusMonths(amountToAdd); 266 case YEARS: return plusYears(amountToAdd); 267 case DECADES: return plusYears(Math.multiplyExact(amountToAdd, 10)); 268 case CENTURIES: return plusYears(Math.multiplyExact(amountToAdd, 100)); 269 case MILLENNIA: return plusYears(Math.multiplyExact(amountToAdd, 1000)); 270 } 271 throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit.getName()); 272 } 273 return unit.addTo(this, amountToAdd); 274 } 275 276 //----------------------------------------------------------------------- 277 private CopticDate plusYears(long years) { 278 return plusMonths(Math.multiplyExact(years, 13)); 279 } 280 281 private CopticDate plusMonths(long months) { 282 if (months == 0) { 283 return this; 284 } 285 long curEm = prolepticYear * 13L + (month - 1); 286 long calcEm = Math.addExact(curEm, months); 287 int newYear = Math.toIntExact(Math.floorDiv(calcEm, 13)); 288 int newMonth = (int)Math.floorMod(calcEm, 13) + 1; 289 return resolvePreviousValid(newYear, newMonth, day); 290 } 291 292 private CopticDate plusDays(long days) { 293 if (days == 0) { 294 return this; 295 } 296 return CopticDate.ofEpochDay(Math.addExact(toEpochDay(), days)); 297 } 298 299 @Override 300 public long periodUntil(Temporal endDateTime, TemporalUnit unit) { 301 if (endDateTime instanceof ChronoLocalDate == false) { 302 throw new DateTimeException("Unable to calculate period between objects of two different types"); 303 } 304 ChronoLocalDate<?> end = (ChronoLocalDate<?>) endDateTime; 305 if (getChronology().equals(end.getChronology()) == false) { 306 throw new DateTimeException("Unable to calculate period between two different chronologies"); 307 } 308 if (unit instanceof ChronoUnit) { 309 return LocalDate.from(this).periodUntil(end, unit); // TODO: this is wrong 310 } 311 return unit.between(this, endDateTime); 312 } 313 314 @Override 315 public Period periodUntil(ChronoLocalDate<?> endDate) { 316 // TODO: untested 317 CopticDate end = (CopticDate) getChronology().date(endDate); 318 long totalMonths = (end.prolepticYear - this.prolepticYear) * 13 + (end.month - this.month); // safe 319 int days = end.day - this.day; 320 if (totalMonths > 0 && days < 0) { 321 totalMonths--; 322 CopticDate calcDate = this.plusMonths(totalMonths); 323 days = (int) (end.toEpochDay() - calcDate.toEpochDay()); // safe 324 } else if (totalMonths < 0 && days > 0) { 325 totalMonths++; 326 days -= end.lengthOfMonth(); 327 } 328 long years = totalMonths / 13; // safe 329 int months = (int) (totalMonths % 13); // safe 330 return Period.of(Math.toIntExact(years), months, days); 331 } 332 333 //----------------------------------------------------------------------- 334 @Override 335 public long toEpochDay() { 336 long year = (long) prolepticYear; 337 long copticEpochDay = ((year - 1) * 365) + Math.floorDiv(year, 4) + (get(ChronoField.DAY_OF_YEAR) - 1); 338 return copticEpochDay - EPOCH_DAY_DIFFERENCE; 339 } 340 341 @Override 342 public String toString() { 343 // getLong() reduces chances of exceptions in toString() 344 long yoe = getLong(YEAR_OF_ERA); 345 long moy = getLong(MONTH_OF_YEAR); 346 long dom = getLong(DAY_OF_MONTH); 347 StringBuilder buf = new StringBuilder(30); 348 buf.append(getChronology().toString()) 349 .append(" ") 350 .append(getEra()) 351 .append(" ") 352 .append(yoe) 353 .append(moy < 10 ? "-0" : "-").append(moy) 354 .append(dom < 10 ? "-0" : "-").append(dom); 355 return buf.toString(); 356 } 357 }