| /* |
| * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved. |
| * 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. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * 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 java.time.chrono; |
| |
| import static java.time.temporal.ChronoField.DAY_OF_MONTH; |
| import static java.time.temporal.ChronoField.ERA; |
| import static java.time.temporal.ChronoField.HOUR_OF_DAY; |
| import static java.time.temporal.ChronoField.MINUTE_OF_HOUR; |
| import static java.time.temporal.ChronoField.MONTH_OF_YEAR; |
| import static java.time.temporal.ChronoField.PROLEPTIC_MONTH; |
| import static java.time.temporal.ChronoField.SECOND_OF_MINUTE; |
| import static java.time.temporal.ChronoField.YEAR; |
| import static java.time.temporal.ChronoField.YEAR_OF_ERA; |
| |
| import java.io.InvalidObjectException; |
| import java.io.ObjectInputStream; |
| import java.io.Serializable; |
| import java.time.Clock; |
| import java.time.DateTimeException; |
| import java.time.Instant; |
| import java.time.LocalDate; |
| import java.time.LocalDateTime; |
| import java.time.Month; |
| import java.time.Period; |
| import java.time.Year; |
| import java.time.ZonedDateTime; |
| import java.time.ZoneId; |
| import java.time.ZoneOffset; |
| import java.time.format.ResolverStyle; |
| import java.time.temporal.ChronoField; |
| import java.time.temporal.TemporalAccessor; |
| import java.time.temporal.TemporalField; |
| import java.time.temporal.ValueRange; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| /** |
| * The ISO calendar system. |
| * <p> |
| * This chronology defines the rules of the ISO calendar system. |
| * This calendar system is based on the ISO-8601 standard, which is the |
| * <i>de facto</i> world calendar. |
| * <p> |
| * The fields are defined as follows: |
| * <ul> |
| * <li>era - There are two eras, 'Current Era' (CE) and 'Before Current Era' (BCE). |
| * <li>year-of-era - The year-of-era is the same as the proleptic-year for the current CE era. |
| * For the BCE era before the ISO epoch the year increases from 1 upwards as time goes backwards. |
| * <li>proleptic-year - The proleptic year is the same as the year-of-era for the |
| * current era. For the previous era, years have zero, then negative values. |
| * <li>month-of-year - There are 12 months in an ISO year, numbered from 1 to 12. |
| * <li>day-of-month - There are between 28 and 31 days in each of the ISO month, numbered from 1 to 31. |
| * Months 4, 6, 9 and 11 have 30 days, Months 1, 3, 5, 7, 8, 10 and 12 have 31 days. |
| * Month 2 has 28 days, or 29 in a leap year. |
| * <li>day-of-year - There are 365 days in a standard ISO year and 366 in a leap year. |
| * The days are numbered from 1 to 365 or 1 to 366. |
| * <li>leap-year - Leap years occur every 4 years, except where the year is divisble by 100 and not divisble by 400. |
| * </ul> |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| public final class IsoChronology extends AbstractChronology implements Serializable { |
| |
| /** |
| * Singleton instance of the ISO chronology. |
| */ |
| public static final IsoChronology INSTANCE = new IsoChronology(); |
| |
| /** |
| * Serialization version. |
| */ |
| @java.io.Serial |
| private static final long serialVersionUID = -1440403870442975015L; |
| |
| private static final long DAYS_0000_TO_1970 = (146097 * 5L) - (30L * 365L + 7L); // taken from LocalDate |
| |
| /** |
| * Restricted constructor. |
| */ |
| private IsoChronology() { |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the ID of the chronology - 'ISO'. |
| * <p> |
| * The ID uniquely identifies the {@code Chronology}. |
| * It can be used to lookup the {@code Chronology} using {@link Chronology#of(String)}. |
| * |
| * @return the chronology ID - 'ISO' |
| * @see #getCalendarType() |
| */ |
| @Override |
| public String getId() { |
| return "ISO"; |
| } |
| |
| /** |
| * Gets the calendar type of the underlying calendar system - 'iso8601'. |
| * <p> |
| * The calendar type is an identifier defined by the |
| * <em>Unicode Locale Data Markup Language (LDML)</em> specification. |
| * It can be used to lookup the {@code Chronology} using {@link Chronology#of(String)}. |
| * It can also be used as part of a locale, accessible via |
| * {@link Locale#getUnicodeLocaleType(String)} with the key 'ca'. |
| * |
| * @return the calendar system type - 'iso8601' |
| * @see #getId() |
| */ |
| @Override |
| public String getCalendarType() { |
| return "iso8601"; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an ISO local date from the era, year-of-era, month-of-year |
| * and day-of-month fields. |
| * |
| * @param era the ISO era, not null |
| * @param yearOfEra the ISO year-of-era |
| * @param month the ISO month-of-year |
| * @param dayOfMonth the ISO day-of-month |
| * @return the ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| * @throws ClassCastException if the type of {@code era} is not {@code IsoEra} |
| */ |
| @Override // override with covariant return type |
| public LocalDate date(Era era, int yearOfEra, int month, int dayOfMonth) { |
| return date(prolepticYear(era, yearOfEra), month, dayOfMonth); |
| } |
| |
| /** |
| * Obtains an ISO local date from the proleptic-year, month-of-year |
| * and day-of-month fields. |
| * <p> |
| * This is equivalent to {@link LocalDate#of(int, int, int)}. |
| * |
| * @param prolepticYear the ISO proleptic-year |
| * @param month the ISO month-of-year |
| * @param dayOfMonth the ISO day-of-month |
| * @return the ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate date(int prolepticYear, int month, int dayOfMonth) { |
| return LocalDate.of(prolepticYear, month, dayOfMonth); |
| } |
| |
| /** |
| * Obtains an ISO local date from the era, year-of-era and day-of-year fields. |
| * |
| * @param era the ISO era, not null |
| * @param yearOfEra the ISO year-of-era |
| * @param dayOfYear the ISO day-of-year |
| * @return the ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate dateYearDay(Era era, int yearOfEra, int dayOfYear) { |
| return dateYearDay(prolepticYear(era, yearOfEra), dayOfYear); |
| } |
| |
| /** |
| * Obtains an ISO local date from the proleptic-year and day-of-year fields. |
| * <p> |
| * This is equivalent to {@link LocalDate#ofYearDay(int, int)}. |
| * |
| * @param prolepticYear the ISO proleptic-year |
| * @param dayOfYear the ISO day-of-year |
| * @return the ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate dateYearDay(int prolepticYear, int dayOfYear) { |
| return LocalDate.ofYearDay(prolepticYear, dayOfYear); |
| } |
| |
| /** |
| * Obtains an ISO local date from the epoch-day. |
| * <p> |
| * This is equivalent to {@link LocalDate#ofEpochDay(long)}. |
| * |
| * @param epochDay the epoch day |
| * @return the ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate dateEpochDay(long epochDay) { |
| return LocalDate.ofEpochDay(epochDay); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an ISO local date from another date-time object. |
| * <p> |
| * This is equivalent to {@link LocalDate#from(TemporalAccessor)}. |
| * |
| * @param temporal the date-time object to convert, not null |
| * @return the ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate date(TemporalAccessor temporal) { |
| return LocalDate.from(temporal); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the number of seconds from the epoch of 1970-01-01T00:00:00Z. |
| * <p> |
| * The number of seconds is calculated using the year, |
| * month, day-of-month, hour, minute, second, and zoneOffset. |
| * |
| * @param prolepticYear the year, from MIN_YEAR to MAX_YEAR |
| * @param month the month-of-year, from 1 to 12 |
| * @param dayOfMonth the day-of-month, from 1 to 31 |
| * @param hour the hour-of-day, from 0 to 23 |
| * @param minute the minute-of-hour, from 0 to 59 |
| * @param second the second-of-minute, from 0 to 59 |
| * @param zoneOffset the zone offset, not null |
| * @return the number of seconds relative to 1970-01-01T00:00:00Z, may be negative |
| * @throws DateTimeException if the value of any argument is out of range, |
| * or if the day-of-month is invalid for the month-of-year |
| * @since 9 |
| */ |
| @Override |
| public long epochSecond(int prolepticYear, int month, int dayOfMonth, |
| int hour, int minute, int second, ZoneOffset zoneOffset) { |
| YEAR.checkValidValue(prolepticYear); |
| MONTH_OF_YEAR.checkValidValue(month); |
| DAY_OF_MONTH.checkValidValue(dayOfMonth); |
| HOUR_OF_DAY.checkValidValue(hour); |
| MINUTE_OF_HOUR.checkValidValue(minute); |
| SECOND_OF_MINUTE.checkValidValue(second); |
| Objects.requireNonNull(zoneOffset, "zoneOffset"); |
| if (dayOfMonth > 28) { |
| int dom = numberOfDaysOfMonth(prolepticYear, month); |
| if (dayOfMonth > dom) { |
| if (dayOfMonth == 29) { |
| throw new DateTimeException("Invalid date 'February 29' as '" + prolepticYear + "' is not a leap year"); |
| } else { |
| throw new DateTimeException("Invalid date '" + Month.of(month).name() + " " + dayOfMonth + "'"); |
| } |
| } |
| } |
| |
| long totalDays = 0; |
| int timeinSec = 0; |
| totalDays += 365L * prolepticYear; |
| if (prolepticYear >= 0) { |
| totalDays += (prolepticYear + 3L) / 4 - (prolepticYear + 99L) / 100 + (prolepticYear + 399L) / 400; |
| } else { |
| totalDays -= prolepticYear / -4 - prolepticYear / -100 + prolepticYear / -400; |
| } |
| totalDays += (367 * month - 362) / 12; |
| totalDays += dayOfMonth - 1; |
| if (month > 2) { |
| totalDays--; |
| if (IsoChronology.INSTANCE.isLeapYear(prolepticYear) == false) { |
| totalDays--; |
| } |
| } |
| totalDays -= DAYS_0000_TO_1970; |
| timeinSec = (hour * 60 + minute ) * 60 + second; |
| return Math.addExact(Math.multiplyExact(totalDays, 86400L), timeinSec - zoneOffset.getTotalSeconds()); |
| } |
| |
| /** |
| * Gets the number of days for the given month in the given year. |
| * |
| * @param year the year to represent, from MIN_YEAR to MAX_YEAR |
| * @param month the month-of-year to represent, from 1 to 12 |
| * @return the number of days for the given month in the given year |
| */ |
| private int numberOfDaysOfMonth(int year, int month) { |
| int dom; |
| switch (month) { |
| case 2: |
| dom = (IsoChronology.INSTANCE.isLeapYear(year) ? 29 : 28); |
| break; |
| case 4: |
| case 6: |
| case 9: |
| case 11: |
| dom = 30; |
| break; |
| default: |
| dom = 31; |
| break; |
| } |
| return dom; |
| } |
| |
| |
| /** |
| * Obtains an ISO local date-time from another date-time object. |
| * <p> |
| * This is equivalent to {@link LocalDateTime#from(TemporalAccessor)}. |
| * |
| * @param temporal the date-time object to convert, not null |
| * @return the ISO local date-time, not null |
| * @throws DateTimeException if unable to create the date-time |
| */ |
| @Override // override with covariant return type |
| public LocalDateTime localDateTime(TemporalAccessor temporal) { |
| return LocalDateTime.from(temporal); |
| } |
| |
| /** |
| * Obtains an ISO zoned date-time from another date-time object. |
| * <p> |
| * This is equivalent to {@link ZonedDateTime#from(TemporalAccessor)}. |
| * |
| * @param temporal the date-time object to convert, not null |
| * @return the ISO zoned date-time, not null |
| * @throws DateTimeException if unable to create the date-time |
| */ |
| @Override // override with covariant return type |
| public ZonedDateTime zonedDateTime(TemporalAccessor temporal) { |
| return ZonedDateTime.from(temporal); |
| } |
| |
| /** |
| * Obtains an ISO zoned date-time in this chronology from an {@code Instant}. |
| * <p> |
| * This is equivalent to {@link ZonedDateTime#ofInstant(Instant, ZoneId)}. |
| * |
| * @param instant the instant to create the date-time from, not null |
| * @param zone the time-zone, not null |
| * @return the zoned date-time, not null |
| * @throws DateTimeException if the result exceeds the supported range |
| */ |
| @Override |
| public ZonedDateTime zonedDateTime(Instant instant, ZoneId zone) { |
| return ZonedDateTime.ofInstant(instant, zone); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains the current ISO local date from the system clock in the default time-zone. |
| * <p> |
| * This will query the {@link Clock#systemDefaultZone() system clock} in the default |
| * time-zone to obtain the current date. |
| * <p> |
| * Using this method will prevent the ability to use an alternate clock for testing |
| * because the clock is hard-coded. |
| * |
| * @return the current ISO local date using the system clock and default time-zone, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate dateNow() { |
| return dateNow(Clock.systemDefaultZone()); |
| } |
| |
| /** |
| * Obtains the current ISO local date from the system clock in the specified time-zone. |
| * <p> |
| * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current date. |
| * Specifying the time-zone avoids dependence on the default time-zone. |
| * <p> |
| * Using this method will prevent the ability to use an alternate clock for testing |
| * because the clock is hard-coded. |
| * |
| * @return the current ISO local date using the system clock, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate dateNow(ZoneId zone) { |
| return dateNow(Clock.system(zone)); |
| } |
| |
| /** |
| * Obtains the current ISO local date from the specified clock. |
| * <p> |
| * This will query the specified clock to obtain the current date - today. |
| * Using this method allows the use of an alternate clock for testing. |
| * The alternate clock may be introduced using {@link Clock dependency injection}. |
| * |
| * @param clock the clock to use, not null |
| * @return the current ISO local date, not null |
| * @throws DateTimeException if unable to create the date |
| */ |
| @Override // override with covariant return type |
| public LocalDate dateNow(Clock clock) { |
| Objects.requireNonNull(clock, "clock"); |
| return date(LocalDate.now(clock)); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if the year is a leap year, according to the ISO proleptic |
| * calendar system rules. |
| * <p> |
| * This method applies the current rules for leap years across the whole time-line. |
| * In general, a year is a leap year if it is divisible by four without |
| * remainder. However, years divisible by 100, are not leap years, with |
| * the exception of years divisible by 400 which are. |
| * <p> |
| * For example, 1904 is a leap year it is divisible by 4. |
| * 1900 was not a leap year as it is divisible by 100, however 2000 was a |
| * leap year as it is divisible by 400. |
| * <p> |
| * The calculation is proleptic - applying the same rules into the far future and far past. |
| * This is historically inaccurate, but is correct for the ISO-8601 standard. |
| * |
| * @param prolepticYear the ISO proleptic year to check |
| * @return true if the year is leap, false otherwise |
| */ |
| @Override |
| public boolean isLeapYear(long prolepticYear) { |
| return ((prolepticYear & 3) == 0) && ((prolepticYear % 100) != 0 || (prolepticYear % 400) == 0); |
| } |
| |
| @Override |
| public int prolepticYear(Era era, int yearOfEra) { |
| if (!(era instanceof IsoEra)) { |
| throw new ClassCastException("Era must be IsoEra"); |
| } |
| return (era == IsoEra.CE ? yearOfEra : 1 - yearOfEra); |
| } |
| |
| @Override |
| public IsoEra eraOf(int eraValue) { |
| return IsoEra.of(eraValue); |
| } |
| |
| @Override |
| public List<Era> eras() { |
| return List.of(IsoEra.values()); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Resolves parsed {@code ChronoField} values into a date during parsing. |
| * <p> |
| * Most {@code TemporalField} implementations are resolved using the |
| * resolve method on the field. By contrast, the {@code ChronoField} class |
| * defines fields that only have meaning relative to the chronology. |
| * As such, {@code ChronoField} date fields are resolved here in the |
| * context of a specific chronology. |
| * <p> |
| * {@code ChronoField} instances on the ISO calendar system are resolved |
| * as follows. |
| * <ul> |
| * <li>{@code EPOCH_DAY} - If present, this is converted to a {@code LocalDate} |
| * and all other date fields are then cross-checked against the date. |
| * <li>{@code PROLEPTIC_MONTH} - If present, then it is split into the |
| * {@code YEAR} and {@code MONTH_OF_YEAR}. If the mode is strict or smart |
| * then the field is validated. |
| * <li>{@code YEAR_OF_ERA} and {@code ERA} - If both are present, then they |
| * are combined to form a {@code YEAR}. In lenient mode, the {@code YEAR_OF_ERA} |
| * range is not validated, in smart and strict mode it is. The {@code ERA} is |
| * validated for range in all three modes. If only the {@code YEAR_OF_ERA} is |
| * present, and the mode is smart or lenient, then the current era (CE/AD) |
| * is assumed. In strict mode, no era is assumed and the {@code YEAR_OF_ERA} is |
| * left untouched. If only the {@code ERA} is present, then it is left untouched. |
| * <li>{@code YEAR}, {@code MONTH_OF_YEAR} and {@code DAY_OF_MONTH} - |
| * If all three are present, then they are combined to form a {@code LocalDate}. |
| * In all three modes, the {@code YEAR} is validated. If the mode is smart or strict, |
| * then the month and day are validated, with the day validated from 1 to 31. |
| * If the mode is lenient, then the date is combined in a manner equivalent to |
| * creating a date on the first of January in the requested year, then adding |
| * the difference in months, then the difference in days. |
| * If the mode is smart, and the day-of-month is greater than the maximum for |
| * the year-month, then the day-of-month is adjusted to the last day-of-month. |
| * If the mode is strict, then the three fields must form a valid date. |
| * <li>{@code YEAR} and {@code DAY_OF_YEAR} - |
| * If both are present, then they are combined to form a {@code LocalDate}. |
| * In all three modes, the {@code YEAR} is validated. |
| * If the mode is lenient, then the date is combined in a manner equivalent to |
| * creating a date on the first of January in the requested year, then adding |
| * the difference in days. |
| * If the mode is smart or strict, then the two fields must form a valid date. |
| * <li>{@code YEAR}, {@code MONTH_OF_YEAR}, {@code ALIGNED_WEEK_OF_MONTH} and |
| * {@code ALIGNED_DAY_OF_WEEK_IN_MONTH} - |
| * If all four are present, then they are combined to form a {@code LocalDate}. |
| * In all three modes, the {@code YEAR} is validated. |
| * If the mode is lenient, then the date is combined in a manner equivalent to |
| * creating a date on the first of January in the requested year, then adding |
| * the difference in months, then the difference in weeks, then in days. |
| * If the mode is smart or strict, then the all four fields are validated to |
| * their outer ranges. The date is then combined in a manner equivalent to |
| * creating a date on the first day of the requested year and month, then adding |
| * the amount in weeks and days to reach their values. If the mode is strict, |
| * the date is additionally validated to check that the day and week adjustment |
| * did not change the month. |
| * <li>{@code YEAR}, {@code MONTH_OF_YEAR}, {@code ALIGNED_WEEK_OF_MONTH} and |
| * {@code DAY_OF_WEEK} - If all four are present, then they are combined to |
| * form a {@code LocalDate}. The approach is the same as described above for |
| * years, months and weeks in {@code ALIGNED_DAY_OF_WEEK_IN_MONTH}. |
| * The day-of-week is adjusted as the next or same matching day-of-week once |
| * the years, months and weeks have been handled. |
| * <li>{@code YEAR}, {@code ALIGNED_WEEK_OF_YEAR} and {@code ALIGNED_DAY_OF_WEEK_IN_YEAR} - |
| * If all three are present, then they are combined to form a {@code LocalDate}. |
| * In all three modes, the {@code YEAR} is validated. |
| * If the mode is lenient, then the date is combined in a manner equivalent to |
| * creating a date on the first of January in the requested year, then adding |
| * the difference in weeks, then in days. |
| * If the mode is smart or strict, then the all three fields are validated to |
| * their outer ranges. The date is then combined in a manner equivalent to |
| * creating a date on the first day of the requested year, then adding |
| * the amount in weeks and days to reach their values. If the mode is strict, |
| * the date is additionally validated to check that the day and week adjustment |
| * did not change the year. |
| * <li>{@code YEAR}, {@code ALIGNED_WEEK_OF_YEAR} and {@code DAY_OF_WEEK} - |
| * If all three are present, then they are combined to form a {@code LocalDate}. |
| * The approach is the same as described above for years and weeks in |
| * {@code ALIGNED_DAY_OF_WEEK_IN_YEAR}. The day-of-week is adjusted as the |
| * next or same matching day-of-week once the years and weeks have been handled. |
| * </ul> |
| * |
| * @param fieldValues the map of fields to values, which can be updated, not null |
| * @param resolverStyle the requested type of resolve, not null |
| * @return the resolved date, null if insufficient information to create a date |
| * @throws DateTimeException if the date cannot be resolved, typically |
| * because of a conflict in the input data |
| */ |
| @Override // override for performance |
| public LocalDate resolveDate(Map<TemporalField, Long> fieldValues, ResolverStyle resolverStyle) { |
| return (LocalDate) super.resolveDate(fieldValues, resolverStyle); |
| } |
| |
| @Override // override for better proleptic algorithm |
| void resolveProlepticMonth(Map<TemporalField, Long> fieldValues, ResolverStyle resolverStyle) { |
| Long pMonth = fieldValues.remove(PROLEPTIC_MONTH); |
| if (pMonth != null) { |
| if (resolverStyle != ResolverStyle.LENIENT) { |
| PROLEPTIC_MONTH.checkValidValue(pMonth); |
| } |
| addFieldValue(fieldValues, MONTH_OF_YEAR, Math.floorMod(pMonth, 12) + 1); |
| addFieldValue(fieldValues, YEAR, Math.floorDiv(pMonth, 12)); |
| } |
| } |
| |
| @Override // override for enhanced behaviour |
| LocalDate resolveYearOfEra(Map<TemporalField, Long> fieldValues, ResolverStyle resolverStyle) { |
| Long yoeLong = fieldValues.remove(YEAR_OF_ERA); |
| if (yoeLong != null) { |
| if (resolverStyle != ResolverStyle.LENIENT) { |
| YEAR_OF_ERA.checkValidValue(yoeLong); |
| } |
| Long era = fieldValues.remove(ERA); |
| if (era == null) { |
| Long year = fieldValues.get(YEAR); |
| if (resolverStyle == ResolverStyle.STRICT) { |
| // do not invent era if strict, but do cross-check with year |
| if (year != null) { |
| addFieldValue(fieldValues, YEAR, (year > 0 ? yoeLong: Math.subtractExact(1, yoeLong))); |
| } else { |
| // reinstate the field removed earlier, no cross-check issues |
| fieldValues.put(YEAR_OF_ERA, yoeLong); |
| } |
| } else { |
| // invent era |
| addFieldValue(fieldValues, YEAR, (year == null || year > 0 ? yoeLong: Math.subtractExact(1, yoeLong))); |
| } |
| } else if (era.longValue() == 1L) { |
| addFieldValue(fieldValues, YEAR, yoeLong); |
| } else if (era.longValue() == 0L) { |
| addFieldValue(fieldValues, YEAR, Math.subtractExact(1, yoeLong)); |
| } else { |
| throw new DateTimeException("Invalid value for era: " + era); |
| } |
| } else if (fieldValues.containsKey(ERA)) { |
| ERA.checkValidValue(fieldValues.get(ERA)); // always validated |
| } |
| return null; |
| } |
| |
| @Override // override for performance |
| LocalDate resolveYMD(Map <TemporalField, Long> fieldValues, ResolverStyle resolverStyle) { |
| int y = YEAR.checkValidIntValue(fieldValues.remove(YEAR)); |
| if (resolverStyle == ResolverStyle.LENIENT) { |
| long months = Math.subtractExact(fieldValues.remove(MONTH_OF_YEAR), 1); |
| long days = Math.subtractExact(fieldValues.remove(DAY_OF_MONTH), 1); |
| return LocalDate.of(y, 1, 1).plusMonths(months).plusDays(days); |
| } |
| int moy = MONTH_OF_YEAR.checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR)); |
| int dom = DAY_OF_MONTH.checkValidIntValue(fieldValues.remove(DAY_OF_MONTH)); |
| if (resolverStyle == ResolverStyle.SMART) { // previous valid |
| if (moy == 4 || moy == 6 || moy == 9 || moy == 11) { |
| dom = Math.min(dom, 30); |
| } else if (moy == 2) { |
| dom = Math.min(dom, Month.FEBRUARY.length(Year.isLeap(y))); |
| |
| } |
| } |
| return LocalDate.of(y, moy, dom); |
| } |
| |
| //----------------------------------------------------------------------- |
| @Override |
| public ValueRange range(ChronoField field) { |
| return field.range(); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a period for this chronology based on years, months and days. |
| * <p> |
| * This returns a period tied to the ISO chronology using the specified |
| * years, months and days. See {@link Period} for further details. |
| * |
| * @param years the number of years, may be negative |
| * @param months the number of years, may be negative |
| * @param days the number of years, may be negative |
| * @return the ISO period, not null |
| */ |
| @Override // override with covariant return type |
| public Period period(int years, int months, int days) { |
| return Period.of(years, months, days); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Writes the Chronology using a |
| * <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>. |
| * @serialData |
| * <pre> |
| * out.writeByte(1); // identifies a Chronology |
| * out.writeUTF(getId()); |
| * </pre> |
| * |
| * @return the instance of {@code Ser}, not null |
| */ |
| @Override |
| @java.io.Serial |
| Object writeReplace() { |
| return super.writeReplace(); |
| } |
| |
| /** |
| * Defend against malicious streams. |
| * |
| * @param s the stream to read |
| * @throws InvalidObjectException always |
| */ |
| @java.io.Serial |
| private void readObject(ObjectInputStream s) throws InvalidObjectException { |
| throw new InvalidObjectException("Deserialization via serialization delegate"); |
| } |
| } |
