788 lines
32 KiB
Java
788 lines
32 KiB
Java
/*
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* Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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*
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* Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* * Neither the name of JSR-310 nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package java.time;
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import static java.time.temporal.ChronoField.DAY_OF_MONTH;
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import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
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import java.io.DataInput;
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import java.io.DataOutput;
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import java.io.IOException;
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import java.io.InvalidObjectException;
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import java.io.ObjectInputStream;
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import java.io.Serializable;
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import java.time.chrono.Chronology;
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import java.time.chrono.IsoChronology;
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import java.time.format.DateTimeFormatter;
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import java.time.format.DateTimeFormatterBuilder;
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import java.time.format.DateTimeParseException;
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import java.time.temporal.ChronoField;
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import java.time.temporal.Temporal;
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import java.time.temporal.TemporalAccessor;
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import java.time.temporal.TemporalAdjuster;
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import java.time.temporal.TemporalField;
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import java.time.temporal.TemporalQueries;
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import java.time.temporal.TemporalQuery;
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import java.time.temporal.UnsupportedTemporalTypeException;
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import java.time.temporal.ValueRange;
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import java.util.Objects;
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// Android-changed: removed ValueBased paragraph.
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/**
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* A month-day in the ISO-8601 calendar system, such as {@code --12-03}.
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* <p>
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* {@code MonthDay} is an immutable date-time object that represents the combination
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* of a month and day-of-month. Any field that can be derived from a month and day,
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* such as quarter-of-year, can be obtained.
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* <p>
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* This class does not store or represent a year, time or time-zone.
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* For example, the value "December 3rd" can be stored in a {@code MonthDay}.
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* <p>
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* Since a {@code MonthDay} does not possess a year, the leap day of
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* February 29th is considered valid.
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* <p>
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* This class implements {@link TemporalAccessor} rather than {@link Temporal}.
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* This is because it is not possible to define whether February 29th is valid or not
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* without external information, preventing the implementation of plus/minus.
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* Related to this, {@code MonthDay} only provides access to query and set the fields
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* {@code MONTH_OF_YEAR} and {@code DAY_OF_MONTH}.
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* <p>
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* The ISO-8601 calendar system is the modern civil calendar system used today
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* in most of the world. It is equivalent to the proleptic Gregorian calendar
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* system, in which today's rules for leap years are applied for all time.
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* For most applications written today, the ISO-8601 rules are entirely suitable.
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* However, any application that makes use of historical dates, and requires them
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* to be accurate will find the ISO-8601 approach unsuitable.
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*
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* @implSpec
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* This class is immutable and thread-safe.
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*
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* @since 1.8
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*/
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public final class MonthDay
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implements TemporalAccessor, TemporalAdjuster, Comparable<MonthDay>, Serializable {
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/**
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* Serialization version.
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*/
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@java.io.Serial
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private static final long serialVersionUID = -939150713474957432L;
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/**
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* Parser.
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*/
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private static final DateTimeFormatter PARSER = new DateTimeFormatterBuilder()
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.appendLiteral("--")
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.appendValue(MONTH_OF_YEAR, 2)
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.appendLiteral('-')
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.appendValue(DAY_OF_MONTH, 2)
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.toFormatter();
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/**
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* The month-of-year, not null.
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*/
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private final int month;
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/**
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* The day-of-month.
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*/
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private final int day;
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//-----------------------------------------------------------------------
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/**
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* Obtains the current month-day from the system clock in the default time-zone.
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* <p>
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* This will query the {@link Clock#systemDefaultZone() system clock} in the default
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* time-zone to obtain the current month-day.
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* <p>
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* Using this method will prevent the ability to use an alternate clock for testing
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* because the clock is hard-coded.
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*
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* @return the current month-day using the system clock and default time-zone, not null
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*/
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public static MonthDay now() {
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return now(Clock.systemDefaultZone());
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}
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/**
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* Obtains the current month-day from the system clock in the specified time-zone.
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* <p>
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* This will query the {@link Clock#system(ZoneId) system clock} to obtain the current month-day.
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* Specifying the time-zone avoids dependence on the default time-zone.
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* <p>
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* Using this method will prevent the ability to use an alternate clock for testing
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* because the clock is hard-coded.
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*
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* @param zone the zone ID to use, not null
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* @return the current month-day using the system clock, not null
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*/
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public static MonthDay now(ZoneId zone) {
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return now(Clock.system(zone));
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}
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/**
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* Obtains the current month-day from the specified clock.
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* <p>
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* This will query the specified clock to obtain the current month-day.
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* Using this method allows the use of an alternate clock for testing.
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* The alternate clock may be introduced using {@link Clock dependency injection}.
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*
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* @param clock the clock to use, not null
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* @return the current month-day, not null
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*/
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public static MonthDay now(Clock clock) {
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final LocalDate now = LocalDate.now(clock); // called once
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return MonthDay.of(now.getMonth(), now.getDayOfMonth());
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}
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//-----------------------------------------------------------------------
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/**
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* Obtains an instance of {@code MonthDay}.
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* <p>
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* The day-of-month must be valid for the month within a leap year.
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* Hence, for February, day 29 is valid.
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* <p>
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* For example, passing in April and day 31 will throw an exception, as
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* there can never be April 31st in any year. By contrast, passing in
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* February 29th is permitted, as that month-day can sometimes be valid.
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*
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* @param month the month-of-year to represent, not null
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* @param dayOfMonth the day-of-month to represent, from 1 to 31
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* @return the month-day, not null
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* @throws DateTimeException if the value of any field is out of range,
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* or if the day-of-month is invalid for the month
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*/
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public static MonthDay of(Month month, int dayOfMonth) {
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Objects.requireNonNull(month, "month");
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DAY_OF_MONTH.checkValidValue(dayOfMonth);
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if (dayOfMonth > month.maxLength()) {
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throw new DateTimeException("Illegal value for DayOfMonth field, value " + dayOfMonth +
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" is not valid for month " + month.name());
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}
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return new MonthDay(month.getValue(), dayOfMonth);
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}
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/**
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* Obtains an instance of {@code MonthDay}.
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* <p>
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* The day-of-month must be valid for the month within a leap year.
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* Hence, for month 2 (February), day 29 is valid.
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* <p>
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* For example, passing in month 4 (April) and day 31 will throw an exception, as
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* there can never be April 31st in any year. By contrast, passing in
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* February 29th is permitted, as that month-day can sometimes be valid.
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*
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* @param month the month-of-year to represent, from 1 (January) to 12 (December)
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* @param dayOfMonth the day-of-month to represent, from 1 to 31
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* @return the month-day, not null
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* @throws DateTimeException if the value of any field is out of range,
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* or if the day-of-month is invalid for the month
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*/
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public static MonthDay of(int month, int dayOfMonth) {
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return of(Month.of(month), dayOfMonth);
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}
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//-----------------------------------------------------------------------
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/**
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* Obtains an instance of {@code MonthDay} from a temporal object.
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* <p>
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* This obtains a month-day based on the specified temporal.
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* A {@code TemporalAccessor} represents an arbitrary set of date and time information,
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* which this factory converts to an instance of {@code MonthDay}.
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* <p>
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* The conversion extracts the {@link ChronoField#MONTH_OF_YEAR MONTH_OF_YEAR} and
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* {@link ChronoField#DAY_OF_MONTH DAY_OF_MONTH} fields.
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* The extraction is only permitted if the temporal object has an ISO
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* chronology, or can be converted to a {@code LocalDate}.
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* <p>
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* This method matches the signature of the functional interface {@link TemporalQuery}
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* allowing it to be used as a query via method reference, {@code MonthDay::from}.
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*
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* @param temporal the temporal object to convert, not null
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* @return the month-day, not null
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* @throws DateTimeException if unable to convert to a {@code MonthDay}
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*/
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public static MonthDay from(TemporalAccessor temporal) {
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if (temporal instanceof MonthDay) {
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return (MonthDay) temporal;
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}
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try {
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if (IsoChronology.INSTANCE.equals(Chronology.from(temporal)) == false) {
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temporal = LocalDate.from(temporal);
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}
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return of(temporal.get(MONTH_OF_YEAR), temporal.get(DAY_OF_MONTH));
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} catch (DateTimeException ex) {
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throw new DateTimeException("Unable to obtain MonthDay from TemporalAccessor: " +
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temporal + " of type " + temporal.getClass().getName(), ex);
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}
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}
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//-----------------------------------------------------------------------
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/**
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* Obtains an instance of {@code MonthDay} from a text string such as {@code --12-03}.
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* <p>
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* The string must represent a valid month-day.
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* The format is {@code --MM-dd}.
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*
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* @param text the text to parse such as "--12-03", not null
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* @return the parsed month-day, not null
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* @throws DateTimeParseException if the text cannot be parsed
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*/
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public static MonthDay parse(CharSequence text) {
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return parse(text, PARSER);
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}
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/**
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* Obtains an instance of {@code MonthDay} from a text string using a specific formatter.
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* <p>
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* The text is parsed using the formatter, returning a month-day.
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*
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* @param text the text to parse, not null
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* @param formatter the formatter to use, not null
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* @return the parsed month-day, not null
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* @throws DateTimeParseException if the text cannot be parsed
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*/
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public static MonthDay parse(CharSequence text, DateTimeFormatter formatter) {
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Objects.requireNonNull(formatter, "formatter");
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return formatter.parse(text, MonthDay::from);
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}
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//-----------------------------------------------------------------------
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/**
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* Constructor, previously validated.
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*
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* @param month the month-of-year to represent, validated from 1 to 12
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* @param dayOfMonth the day-of-month to represent, validated from 1 to 29-31
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*/
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private MonthDay(int month, int dayOfMonth) {
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this.month = month;
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this.day = dayOfMonth;
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}
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//-----------------------------------------------------------------------
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/**
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* Checks if the specified field is supported.
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* <p>
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* This checks if this month-day can be queried for the specified field.
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* If false, then calling the {@link #range(TemporalField) range} and
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* {@link #get(TemporalField) get} methods will throw an exception.
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* <p>
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* If the field is a {@link ChronoField} then the query is implemented here.
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* The supported fields are:
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* <ul>
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* <li>{@code MONTH_OF_YEAR}
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* <li>{@code YEAR}
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* </ul>
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* All other {@code ChronoField} instances will return false.
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* <p>
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* If the field is not a {@code ChronoField}, then the result of this method
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* is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)}
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* passing {@code this} as the argument.
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* Whether the field is supported is determined by the field.
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*
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* @param field the field to check, null returns false
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* @return true if the field is supported on this month-day, false if not
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*/
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@Override
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public boolean isSupported(TemporalField field) {
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if (field instanceof ChronoField) {
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return field == MONTH_OF_YEAR || field == DAY_OF_MONTH;
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}
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return field != null && field.isSupportedBy(this);
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}
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/**
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* Gets the range of valid values for the specified field.
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* <p>
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* The range object expresses the minimum and maximum valid values for a field.
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* This month-day is used to enhance the accuracy of the returned range.
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* If it is not possible to return the range, because the field is not supported
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* or for some other reason, an exception is thrown.
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* <p>
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* If the field is a {@link ChronoField} then the query is implemented here.
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* The {@link #isSupported(TemporalField) supported fields} will return
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* appropriate range instances.
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* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
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* <p>
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* If the field is not a {@code ChronoField}, then the result of this method
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* is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}
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* passing {@code this} as the argument.
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* Whether the range can be obtained is determined by the field.
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*
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* @param field the field to query the range for, not null
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* @return the range of valid values for the field, not null
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* @throws DateTimeException if the range for the field cannot be obtained
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* @throws UnsupportedTemporalTypeException if the field is not supported
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*/
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@Override
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public ValueRange range(TemporalField field) {
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if (field == MONTH_OF_YEAR) {
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return field.range();
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} else if (field == DAY_OF_MONTH) {
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return ValueRange.of(1, getMonth().minLength(), getMonth().maxLength());
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}
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return TemporalAccessor.super.range(field);
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}
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/**
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* Gets the value of the specified field from this month-day as an {@code int}.
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* <p>
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* This queries this month-day for the value of the specified field.
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* The returned value will always be within the valid range of values for the field.
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* If it is not possible to return the value, because the field is not supported
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* or for some other reason, an exception is thrown.
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* <p>
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* If the field is a {@link ChronoField} then the query is implemented here.
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* The {@link #isSupported(TemporalField) supported fields} will return valid
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* values based on this month-day.
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* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
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* <p>
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* If the field is not a {@code ChronoField}, then the result of this method
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* is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
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* passing {@code this} as the argument. Whether the value can be obtained,
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* and what the value represents, is determined by the field.
|
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*
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* @param field the field to get, not null
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* @return the value for the field
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* @throws DateTimeException if a value for the field cannot be obtained or
|
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* the value is outside the range of valid values for the field
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* @throws UnsupportedTemporalTypeException if the field is not supported or
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* the range of values exceeds an {@code int}
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* @throws ArithmeticException if numeric overflow occurs
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*/
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@Override // override for Javadoc
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public int get(TemporalField field) {
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return range(field).checkValidIntValue(getLong(field), field);
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}
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|
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/**
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* Gets the value of the specified field from this month-day as a {@code long}.
|
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* <p>
|
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* This queries this month-day for the value of the specified field.
|
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* If it is not possible to return the value, because the field is not supported
|
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* or for some other reason, an exception is thrown.
|
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* <p>
|
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* If the field is a {@link ChronoField} then the query is implemented here.
|
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* The {@link #isSupported(TemporalField) supported fields} will return valid
|
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* values based on this month-day.
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* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
|
|
* <p>
|
|
* If the field is not a {@code ChronoField}, then the result of this method
|
|
* is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
|
|
* passing {@code this} as the argument. Whether the value can be obtained,
|
|
* and what the value represents, is determined by the field.
|
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*
|
|
* @param field the field to get, not null
|
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* @return the value for the field
|
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* @throws DateTimeException if a value for the field cannot be obtained
|
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* @throws UnsupportedTemporalTypeException if the field is not supported
|
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* @throws ArithmeticException if numeric overflow occurs
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*/
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@Override
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public long getLong(TemporalField field) {
|
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if (field instanceof ChronoField chronoField) {
|
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switch (chronoField) {
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// alignedDOW and alignedWOM not supported because they cannot be set in with()
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case DAY_OF_MONTH: return day;
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case MONTH_OF_YEAR: return month;
|
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}
|
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throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
|
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}
|
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return field.getFrom(this);
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}
|
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|
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//-----------------------------------------------------------------------
|
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/**
|
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* Gets the month-of-year field from 1 to 12.
|
|
* <p>
|
|
* This method returns the month as an {@code int} from 1 to 12.
|
|
* Application code is frequently clearer if the enum {@link Month}
|
|
* is used by calling {@link #getMonth()}.
|
|
*
|
|
* @return the month-of-year, from 1 to 12
|
|
* @see #getMonth()
|
|
*/
|
|
public int getMonthValue() {
|
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return month;
|
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}
|
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|
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/**
|
|
* Gets the month-of-year field using the {@code Month} enum.
|
|
* <p>
|
|
* This method returns the enum {@link Month} for the month.
|
|
* This avoids confusion as to what {@code int} values mean.
|
|
* If you need access to the primitive {@code int} value then the enum
|
|
* provides the {@link Month#getValue() int value}.
|
|
*
|
|
* @return the month-of-year, not null
|
|
* @see #getMonthValue()
|
|
*/
|
|
public Month getMonth() {
|
|
return Month.of(month);
|
|
}
|
|
|
|
/**
|
|
* Gets the day-of-month field.
|
|
* <p>
|
|
* This method returns the primitive {@code int} value for the day-of-month.
|
|
*
|
|
* @return the day-of-month, from 1 to 31
|
|
*/
|
|
public int getDayOfMonth() {
|
|
return day;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Checks if the year is valid for this month-day.
|
|
* <p>
|
|
* This method checks whether this month and day and the input year form
|
|
* a valid date. This can only return false for February 29th.
|
|
*
|
|
* @param year the year to validate
|
|
* @return true if the year is valid for this month-day
|
|
* @see Year#isValidMonthDay(MonthDay)
|
|
*/
|
|
public boolean isValidYear(int year) {
|
|
return (day == 29 && month == 2 && Year.isLeap(year) == false) == false;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Returns a copy of this {@code MonthDay} with the month-of-year altered.
|
|
* <p>
|
|
* This returns a month-day with the specified month.
|
|
* If the day-of-month is invalid for the specified month, the day will
|
|
* be adjusted to the last valid day-of-month.
|
|
* <p>
|
|
* This instance is immutable and unaffected by this method call.
|
|
*
|
|
* @param month the month-of-year to set in the returned month-day, from 1 (January) to 12 (December)
|
|
* @return a {@code MonthDay} based on this month-day with the requested month, not null
|
|
* @throws DateTimeException if the month-of-year value is invalid
|
|
*/
|
|
public MonthDay withMonth(int month) {
|
|
return with(Month.of(month));
|
|
}
|
|
|
|
/**
|
|
* Returns a copy of this {@code MonthDay} with the month-of-year altered.
|
|
* <p>
|
|
* This returns a month-day with the specified month.
|
|
* If the day-of-month is invalid for the specified month, the day will
|
|
* be adjusted to the last valid day-of-month.
|
|
* <p>
|
|
* This instance is immutable and unaffected by this method call.
|
|
*
|
|
* @param month the month-of-year to set in the returned month-day, not null
|
|
* @return a {@code MonthDay} based on this month-day with the requested month, not null
|
|
*/
|
|
public MonthDay with(Month month) {
|
|
Objects.requireNonNull(month, "month");
|
|
if (month.getValue() == this.month) {
|
|
return this;
|
|
}
|
|
int day = Math.min(this.day, month.maxLength());
|
|
return new MonthDay(month.getValue(), day);
|
|
}
|
|
|
|
/**
|
|
* Returns a copy of this {@code MonthDay} with the day-of-month altered.
|
|
* <p>
|
|
* This returns a month-day with the specified day-of-month.
|
|
* If the day-of-month is invalid for the month, an exception is thrown.
|
|
* <p>
|
|
* This instance is immutable and unaffected by this method call.
|
|
*
|
|
* @param dayOfMonth the day-of-month to set in the return month-day, from 1 to 31
|
|
* @return a {@code MonthDay} based on this month-day with the requested day, not null
|
|
* @throws DateTimeException if the day-of-month value is invalid,
|
|
* or if the day-of-month is invalid for the month
|
|
*/
|
|
public MonthDay withDayOfMonth(int dayOfMonth) {
|
|
if (dayOfMonth == this.day) {
|
|
return this;
|
|
}
|
|
return of(month, dayOfMonth);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Queries this month-day using the specified query.
|
|
* <p>
|
|
* This queries this month-day using the specified query strategy object.
|
|
* The {@code TemporalQuery} object defines the logic to be used to
|
|
* obtain the result. Read the documentation of the query to understand
|
|
* what the result of this method will be.
|
|
* <p>
|
|
* The result of this method is obtained by invoking the
|
|
* {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the
|
|
* specified query passing {@code this} as the argument.
|
|
*
|
|
* @param <R> the type of the result
|
|
* @param query the query to invoke, not null
|
|
* @return the query result, null may be returned (defined by the query)
|
|
* @throws DateTimeException if unable to query (defined by the query)
|
|
* @throws ArithmeticException if numeric overflow occurs (defined by the query)
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
@Override
|
|
public <R> R query(TemporalQuery<R> query) {
|
|
if (query == TemporalQueries.chronology()) {
|
|
return (R) IsoChronology.INSTANCE;
|
|
}
|
|
return TemporalAccessor.super.query(query);
|
|
}
|
|
|
|
/**
|
|
* Adjusts the specified temporal object to have this month-day.
|
|
* <p>
|
|
* This returns a temporal object of the same observable type as the input
|
|
* with the month and day-of-month changed to be the same as this.
|
|
* <p>
|
|
* The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)}
|
|
* twice, passing {@link ChronoField#MONTH_OF_YEAR} and
|
|
* {@link ChronoField#DAY_OF_MONTH} as the fields.
|
|
* If the specified temporal object does not use the ISO calendar system then
|
|
* a {@code DateTimeException} is thrown.
|
|
* <p>
|
|
* In most cases, it is clearer to reverse the calling pattern by using
|
|
* {@link Temporal#with(TemporalAdjuster)}:
|
|
* <pre>
|
|
* // these two lines are equivalent, but the second approach is recommended
|
|
* temporal = thisMonthDay.adjustInto(temporal);
|
|
* temporal = temporal.with(thisMonthDay);
|
|
* </pre>
|
|
* <p>
|
|
* This instance is immutable and unaffected by this method call.
|
|
*
|
|
* @param temporal the target object to be adjusted, not null
|
|
* @return the adjusted object, not null
|
|
* @throws DateTimeException if unable to make the adjustment
|
|
* @throws ArithmeticException if numeric overflow occurs
|
|
*/
|
|
@Override
|
|
public Temporal adjustInto(Temporal temporal) {
|
|
if (Chronology.from(temporal).equals(IsoChronology.INSTANCE) == false) {
|
|
throw new DateTimeException("Adjustment only supported on ISO date-time");
|
|
}
|
|
temporal = temporal.with(MONTH_OF_YEAR, month);
|
|
return temporal.with(DAY_OF_MONTH, Math.min(temporal.range(DAY_OF_MONTH).getMaximum(), day));
|
|
}
|
|
|
|
/**
|
|
* Formats this month-day using the specified formatter.
|
|
* <p>
|
|
* This month-day will be passed to the formatter to produce a string.
|
|
*
|
|
* @param formatter the formatter to use, not null
|
|
* @return the formatted month-day string, not null
|
|
* @throws DateTimeException if an error occurs during printing
|
|
*/
|
|
public String format(DateTimeFormatter formatter) {
|
|
Objects.requireNonNull(formatter, "formatter");
|
|
return formatter.format(this);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Combines this month-day with a year to create a {@code LocalDate}.
|
|
* <p>
|
|
* This returns a {@code LocalDate} formed from this month-day and the specified year.
|
|
* <p>
|
|
* A month-day of February 29th will be adjusted to February 28th in the resulting
|
|
* date if the year is not a leap year.
|
|
* <p>
|
|
* This instance is immutable and unaffected by this method call.
|
|
*
|
|
* @param year the year to use, from MIN_YEAR to MAX_YEAR
|
|
* @return the local date formed from this month-day and the specified year, not null
|
|
* @throws DateTimeException if the year is outside the valid range of years
|
|
*/
|
|
public LocalDate atYear(int year) {
|
|
return LocalDate.of(year, month, isValidYear(year) ? day : 28);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Compares this month-day to another month-day.
|
|
* <p>
|
|
* The comparison is based first on value of the month, then on the value of the day.
|
|
* It is "consistent with equals", as defined by {@link Comparable}.
|
|
*
|
|
* @param other the other month-day to compare to, not null
|
|
* @return the comparator value, negative if less, positive if greater
|
|
*/
|
|
@Override
|
|
public int compareTo(MonthDay other) {
|
|
int cmp = (month - other.month);
|
|
if (cmp == 0) {
|
|
cmp = (day - other.day);
|
|
}
|
|
return cmp;
|
|
}
|
|
|
|
/**
|
|
* Checks if this month-day is after the specified month-day.
|
|
*
|
|
* @param other the other month-day to compare to, not null
|
|
* @return true if this is after the specified month-day
|
|
*/
|
|
public boolean isAfter(MonthDay other) {
|
|
return compareTo(other) > 0;
|
|
}
|
|
|
|
/**
|
|
* Checks if this month-day is before the specified month-day.
|
|
*
|
|
* @param other the other month-day to compare to, not null
|
|
* @return true if this point is before the specified month-day
|
|
*/
|
|
public boolean isBefore(MonthDay other) {
|
|
return compareTo(other) < 0;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Checks if this month-day is equal to another month-day.
|
|
* <p>
|
|
* The comparison is based on the time-line position of the month-day within a year.
|
|
*
|
|
* @param obj the object to check, null returns false
|
|
* @return true if this is equal to the other month-day
|
|
*/
|
|
@Override
|
|
public boolean equals(Object obj) {
|
|
if (this == obj) {
|
|
return true;
|
|
}
|
|
return (obj instanceof MonthDay other)
|
|
&& month == other.month
|
|
&& day == other.day;
|
|
}
|
|
|
|
/**
|
|
* A hash code for this month-day.
|
|
*
|
|
* @return a suitable hash code
|
|
*/
|
|
@Override
|
|
public int hashCode() {
|
|
return (month << 6) + day;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Outputs this month-day as a {@code String}, such as {@code --12-03}.
|
|
* <p>
|
|
* The output will be in the format {@code --MM-dd}:
|
|
*
|
|
* @return a string representation of this month-day, not null
|
|
*/
|
|
@Override
|
|
public String toString() {
|
|
return new StringBuilder(10).append("--")
|
|
.append(month < 10 ? "0" : "").append(month)
|
|
.append(day < 10 ? "-0" : "-").append(day)
|
|
.toString();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes the object using a
|
|
* <a href="{@docRoot}/serialized-form.html#java.time.Ser">dedicated serialized form</a>.
|
|
* @serialData
|
|
* <pre>
|
|
* out.writeByte(13); // identifies a MonthDay
|
|
* out.writeByte(month);
|
|
* out.writeByte(day);
|
|
* </pre>
|
|
*
|
|
* @return the instance of {@code Ser}, not null
|
|
*/
|
|
@java.io.Serial
|
|
private Object writeReplace() {
|
|
return new Ser(Ser.MONTH_DAY_TYPE, this);
|
|
}
|
|
|
|
/**
|
|
* 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");
|
|
}
|
|
|
|
void writeExternal(DataOutput out) throws IOException {
|
|
out.writeByte(month);
|
|
out.writeByte(day);
|
|
}
|
|
|
|
static MonthDay readExternal(DataInput in) throws IOException {
|
|
byte month = in.readByte();
|
|
byte day = in.readByte();
|
|
return MonthDay.of(month, day);
|
|
}
|
|
|
|
}
|