--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/time/chrono/IsoChronology.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,613 @@
+/*
+ * Copyright (c) 2012, 2013, 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 java.io.InvalidObjectException;
+import static java.time.temporal.ChronoField.DAY_OF_MONTH;
+import static java.time.temporal.ChronoField.ERA;
+import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
+import static java.time.temporal.ChronoField.PROLEPTIC_MONTH;
+import static java.time.temporal.ChronoField.YEAR;
+import static java.time.temporal.ChronoField.YEAR_OF_ERA;
+
+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.ZoneId;
+import java.time.ZonedDateTime;
+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.Arrays;
+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.
+ */
+ private static final long serialVersionUID = -1440403870442975015L;
+
+ /**
+ * 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);
+ }
+
+ /**
+ * 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 == false) {
+ 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 Arrays.<Era>asList(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 period in terms of this chronology, not null
+ * @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="../../../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
+ Object writeReplace() {
+ return super.writeReplace();
+ }
+
+ /**
+ * Defend against malicious streams.
+ *
+ * @param s the stream to read
+ * @throws InvalidObjectException always
+ */
+ private void readObject(ObjectInputStream s) throws InvalidObjectException {
+ throw new InvalidObjectException("Deserialization via serialization delegate");
+ }
+}