| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of JSR-310 nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package tck.java.time.chrono; |
| |
| import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH; |
| import static java.time.temporal.ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR; |
| import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_MONTH; |
| import static java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR; |
| import static java.time.temporal.ChronoField.DAY_OF_MONTH; |
| import static java.time.temporal.ChronoField.MONTH_OF_YEAR; |
| import static java.time.temporal.ChronoField.YEAR_OF_ERA; |
| |
| import java.io.Serializable; |
| |
| import java.time.DateTimeException; |
| import java.time.LocalDate; |
| import java.time.Period; |
| import java.time.Year; |
| import java.time.chrono.ChronoLocalDate; |
| import java.time.temporal.ChronoField; |
| import java.time.temporal.ChronoUnit; |
| import java.time.temporal.Temporal; |
| import java.time.temporal.TemporalField; |
| import java.time.temporal.TemporalUnit; |
| import java.time.temporal.ValueRange; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| |
| /** |
| * A date in the Coptic calendar system. |
| * <p> |
| * This implements {@code ChronoLocalDate} for the {@link CopticChronology Coptic calendar}. |
| * |
| * <h4>Implementation notes</h4> |
| * This class is immutable and thread-safe. |
| */ |
| public final class CopticDate |
| implements ChronoLocalDate, Serializable { |
| |
| /** |
| * Serialization version. |
| */ |
| private static final long serialVersionUID = -7920528871688876868L; |
| /** |
| * The difference between the Coptic and Coptic epoch day count. |
| */ |
| private static final int EPOCH_DAY_DIFFERENCE = 574971 + 40587; |
| |
| /** |
| * The proleptic year. |
| */ |
| private final int prolepticYear; |
| /** |
| * The month. |
| */ |
| private final short month; |
| /** |
| * The day. |
| */ |
| private final short day; |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Creates an instance. |
| * |
| * @param epochDay the epoch day to convert based on 1970-01-01 (ISO) |
| * @return the Coptic date, not null |
| * @throws DateTimeException if the date is invalid |
| */ |
| static CopticDate ofEpochDay(long epochDay) { |
| epochDay += EPOCH_DAY_DIFFERENCE; |
| int prolepticYear = (int) (((epochDay * 4) + 1463) / 1461); |
| int startYearEpochDay = (prolepticYear - 1) * 365 + (prolepticYear / 4); |
| int doy0 = (int) (epochDay - startYearEpochDay); |
| int month = doy0 / 30 + 1; |
| int dom = doy0 % 30 + 1; |
| return new CopticDate(prolepticYear, month, dom); |
| } |
| |
| private static CopticDate resolvePreviousValid(int prolepticYear, int month, int day) { |
| if (month == 13 && day > 5) { |
| day = CopticChronology.INSTANCE.isLeapYear(prolepticYear) ? 6 : 5; |
| } |
| return new CopticDate(prolepticYear, month, day); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Creates an instance. |
| * |
| * @param prolepticYear the Coptic proleptic-year |
| * @param month the Coptic month, from 1 to 13 |
| * @param dayOfMonth the Coptic day-of-month, from 1 to 30 |
| * @throws DateTimeException if the date is invalid |
| */ |
| CopticDate(int prolepticYear, int month, int dayOfMonth) { |
| CopticChronology.MOY_RANGE.checkValidValue(month, MONTH_OF_YEAR); |
| ValueRange range; |
| if (month == 13) { |
| range = CopticChronology.INSTANCE.isLeapYear(prolepticYear) ? CopticChronology.DOM_RANGE_LEAP : CopticChronology.DOM_RANGE_NONLEAP; |
| } else { |
| range = CopticChronology.DOM_RANGE; |
| } |
| range.checkValidValue(dayOfMonth, DAY_OF_MONTH); |
| |
| this.prolepticYear = prolepticYear; |
| this.month = (short) month; |
| this.day = (short) dayOfMonth; |
| } |
| |
| /** |
| * Validates the object. |
| * |
| * @return the resolved date, not null |
| */ |
| private Object readResolve() { |
| // TODO: validate |
| return this; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public CopticChronology getChronology() { |
| return CopticChronology.INSTANCE; |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public int lengthOfMonth() { |
| switch (month) { |
| case 13: |
| return (isLeapYear() ? 6 : 5); |
| default: |
| return 30; |
| } |
| } |
| |
| @Override |
| public ValueRange range(TemporalField field) { |
| if (field instanceof ChronoField) { |
| if (isSupported(field)) { |
| ChronoField f = (ChronoField) field; |
| switch (f) { |
| case DAY_OF_MONTH: return ValueRange.of(1, lengthOfMonth()); |
| case DAY_OF_YEAR: return ValueRange.of(1, lengthOfYear()); |
| case ALIGNED_WEEK_OF_MONTH: return ValueRange.of(1, month == 13 ? 1 : 5); |
| case YEAR: |
| case YEAR_OF_ERA: return (prolepticYear <= 0 ? |
| ValueRange.of(1, Year.MAX_VALUE + 1) : ValueRange.of(1, Year.MAX_VALUE)); // TODO |
| } |
| return getChronology().range(f); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported field: " + field); |
| } |
| return field.rangeRefinedBy(this); |
| } |
| |
| @Override |
| public long getLong(TemporalField field) { |
| if (field instanceof ChronoField) { |
| switch ((ChronoField) field) { |
| case DAY_OF_WEEK: return Math.floorMod(toEpochDay() + 3, 7) + 1; |
| case ALIGNED_DAY_OF_WEEK_IN_MONTH: return ((day - 1) % 7) + 1; |
| case ALIGNED_DAY_OF_WEEK_IN_YEAR: return ((get(ChronoField.DAY_OF_YEAR) - 1) % 7) + 1; |
| case DAY_OF_MONTH: return day; |
| case DAY_OF_YEAR: return (month - 1) * 30 + day; |
| case EPOCH_DAY: return toEpochDay(); |
| case ALIGNED_WEEK_OF_MONTH: return ((day - 1) / 7) + 1; |
| case ALIGNED_WEEK_OF_YEAR: return ((get(ChronoField.DAY_OF_YEAR) - 1) / 7) + 1; |
| case MONTH_OF_YEAR: return month; |
| case YEAR_OF_ERA: return (prolepticYear >= 1 ? prolepticYear : 1 - prolepticYear); |
| case YEAR: return prolepticYear; |
| case ERA: return (prolepticYear >= 1 ? 1 : 0); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported field: " + field); |
| } |
| return field.getFrom(this); |
| } |
| |
| @Override |
| public CopticDate with(TemporalField field, long newValue) { |
| if (field instanceof ChronoField) { |
| ChronoField f = (ChronoField) field; |
| f.checkValidValue(newValue); // TODO: validate value |
| int nvalue = (int) newValue; |
| switch (f) { |
| case DAY_OF_WEEK: return plusDays(newValue - get(ChronoField.DAY_OF_WEEK)); |
| case ALIGNED_DAY_OF_WEEK_IN_MONTH: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_MONTH)); |
| case ALIGNED_DAY_OF_WEEK_IN_YEAR: return plusDays(newValue - getLong(ALIGNED_DAY_OF_WEEK_IN_YEAR)); |
| case DAY_OF_MONTH: return resolvePreviousValid(prolepticYear, month, nvalue); |
| case DAY_OF_YEAR: return resolvePreviousValid(prolepticYear, ((nvalue - 1) / 30) + 1, ((nvalue - 1) % 30) + 1); |
| case EPOCH_DAY: return ofEpochDay(nvalue); |
| case ALIGNED_WEEK_OF_MONTH: return plusDays((newValue - getLong(ALIGNED_WEEK_OF_MONTH)) * 7); |
| case ALIGNED_WEEK_OF_YEAR: return plusDays((newValue - getLong(ALIGNED_WEEK_OF_YEAR)) * 7); |
| case MONTH_OF_YEAR: return resolvePreviousValid(prolepticYear, nvalue, day); |
| case YEAR_OF_ERA: return resolvePreviousValid(prolepticYear >= 1 ? nvalue : 1 - nvalue, month, day); |
| case YEAR: return resolvePreviousValid(nvalue, month, day); |
| case ERA: return resolvePreviousValid(1 - prolepticYear, month, day); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported field: " + field); |
| } |
| return field.adjustInto(this, newValue); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public CopticDate plus(long amountToAdd, TemporalUnit unit) { |
| if (unit instanceof ChronoUnit) { |
| ChronoUnit f = (ChronoUnit) unit; |
| switch (f) { |
| case DAYS: return plusDays(amountToAdd); |
| case WEEKS: return plusDays(Math.multiplyExact(amountToAdd, 7)); |
| case MONTHS: return plusMonths(amountToAdd); |
| case YEARS: return plusYears(amountToAdd); |
| case DECADES: return plusYears(Math.multiplyExact(amountToAdd, 10)); |
| case CENTURIES: return plusYears(Math.multiplyExact(amountToAdd, 100)); |
| case MILLENNIA: return plusYears(Math.multiplyExact(amountToAdd, 1000)); |
| } |
| throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); |
| } |
| return unit.addTo(this, amountToAdd); |
| } |
| |
| //----------------------------------------------------------------------- |
| private CopticDate plusYears(long years) { |
| return plusMonths(Math.multiplyExact(years, 13)); |
| } |
| |
| private CopticDate plusMonths(long months) { |
| if (months == 0) { |
| return this; |
| } |
| long curEm = prolepticYear * 13L + (month - 1); |
| long calcEm = Math.addExact(curEm, months); |
| int newYear = Math.toIntExact(Math.floorDiv(calcEm, 13)); |
| int newMonth = (int)Math.floorMod(calcEm, 13) + 1; |
| return resolvePreviousValid(newYear, newMonth, day); |
| } |
| |
| private CopticDate plusDays(long days) { |
| if (days == 0) { |
| return this; |
| } |
| return CopticDate.ofEpochDay(Math.addExact(toEpochDay(), days)); |
| } |
| |
| @Override |
| public long until(Temporal endExclusive, TemporalUnit unit) { |
| CopticDate end = getChronology().date(endExclusive); |
| if (unit instanceof ChronoUnit) { |
| return LocalDate.from(this).until(end, unit); // TODO: this is wrong |
| } |
| return unit.between(this, end); |
| } |
| |
| @Override |
| public Period until(ChronoLocalDate endDate) { |
| // TODO: untested |
| CopticDate end = getChronology().date(endDate); |
| long totalMonths = (end.prolepticYear - this.prolepticYear) * 13 + (end.month - this.month); // safe |
| int days = end.day - this.day; |
| if (totalMonths > 0 && days < 0) { |
| totalMonths--; |
| CopticDate calcDate = this.plusMonths(totalMonths); |
| days = (int) (end.toEpochDay() - calcDate.toEpochDay()); // safe |
| } else if (totalMonths < 0 && days > 0) { |
| totalMonths++; |
| days -= end.lengthOfMonth(); |
| } |
| long years = totalMonths / 13; // safe |
| int months = (int) (totalMonths % 13); // safe |
| return Period.of(Math.toIntExact(years), months, days); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public long toEpochDay() { |
| long year = (long) prolepticYear; |
| long copticEpochDay = ((year - 1) * 365) + Math.floorDiv(year, 4) + (get(ChronoField.DAY_OF_YEAR) - 1); |
| return copticEpochDay - EPOCH_DAY_DIFFERENCE; |
| } |
| |
| @Override |
| public String toString() { |
| // getLong() reduces chances of exceptions in toString() |
| long yoe = getLong(YEAR_OF_ERA); |
| long moy = getLong(MONTH_OF_YEAR); |
| long dom = getLong(DAY_OF_MONTH); |
| StringBuilder buf = new StringBuilder(30); |
| buf.append(getChronology().toString()) |
| .append(" ") |
| .append(getEra()) |
| .append(" ") |
| .append(yoe) |
| .append(moy < 10 ? "-0" : "-").append(moy) |
| .append(dom < 10 ? "-0" : "-").append(dom); |
| return buf.toString(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof CopticDate) { |
| CopticDate cd = (CopticDate)obj; |
| if (this.prolepticYear == cd.prolepticYear && |
| this.month == cd.month && |
| this.day == cd.day) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| long epDay = toEpochDay(); |
| return getChronology().hashCode() ^ ((int) (epDay ^ (epDay >>> 32))); |
| } |
| |
| } |
