445 lines
20 KiB
Java
445 lines
20 KiB
Java
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/*
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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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* Copyright (c) 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.chrono;
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import static java.time.temporal.ChronoField.DAY_OF_MONTH;
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import static java.time.temporal.ChronoField.ERA;
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import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
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import static java.time.temporal.ChronoField.PROLEPTIC_MONTH;
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import static java.time.temporal.ChronoField.YEAR_OF_ERA;
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import java.io.Serializable;
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import java.time.DateTimeException;
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import java.time.temporal.ChronoUnit;
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import java.time.temporal.Temporal;
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import java.time.temporal.TemporalAdjuster;
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import java.time.temporal.TemporalAmount;
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import java.time.temporal.TemporalField;
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import java.time.temporal.TemporalUnit;
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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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/**
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* A date expressed in terms of a standard year-month-day calendar system.
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* <p>
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* This class is used by applications seeking to handle dates in non-ISO calendar systems.
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* For example, the Japanese, Minguo, Thai Buddhist and others.
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* <p>
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* {@code ChronoLocalDate} is built on the generic concepts of year, month and day.
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* The calendar system, represented by a {@link java.time.chrono.Chronology}, expresses the relationship between
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* the fields and this class allows the resulting date to be manipulated.
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* <p>
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* Note that not all calendar systems are suitable for use with this class.
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* For example, the Mayan calendar uses a system that bears no relation to years, months and days.
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* <p>
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* The API design encourages the use of {@code LocalDate} for the majority of the application.
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* This includes code to read and write from a persistent data store, such as a database,
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* and to send dates and times across a network. The {@code ChronoLocalDate} instance is then used
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* at the user interface level to deal with localized input/output.
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*
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* <P>Example: </p>
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* <pre>
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* System.out.printf("Example()%n");
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* // Enumerate the list of available calendars and print today for each
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* Set<Chronology> chronos = Chronology.getAvailableChronologies();
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* for (Chronology chrono : chronos) {
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* ChronoLocalDate date = chrono.dateNow();
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* System.out.printf(" %20s: %s%n", chrono.getID(), date.toString());
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* }
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*
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* // Print the Hijrah date and calendar
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* ChronoLocalDate date = Chronology.of("Hijrah").dateNow();
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* int day = date.get(ChronoField.DAY_OF_MONTH);
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* int dow = date.get(ChronoField.DAY_OF_WEEK);
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* int month = date.get(ChronoField.MONTH_OF_YEAR);
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* int year = date.get(ChronoField.YEAR);
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* System.out.printf(" Today is %s %s %d-%s-%d%n", date.getChronology().getID(),
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* dow, day, month, year);
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*
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* // Print today's date and the last day of the year
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* ChronoLocalDate now1 = Chronology.of("Hijrah").dateNow();
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* ChronoLocalDate first = now1.with(ChronoField.DAY_OF_MONTH, 1)
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* .with(ChronoField.MONTH_OF_YEAR, 1);
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* ChronoLocalDate last = first.plus(1, ChronoUnit.YEARS)
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* .minus(1, ChronoUnit.DAYS);
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* System.out.printf(" Today is %s: start: %s; end: %s%n", last.getChronology().getID(),
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* first, last);
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* </pre>
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*
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* <h2>Adding Calendars</h2>
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* <p> The set of calendars is extensible by defining a subclass of {@link ChronoLocalDate}
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* to represent a date instance and an implementation of {@code Chronology}
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* to be the factory for the ChronoLocalDate subclass.
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* </p>
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* <p> To permit the discovery of the additional calendar types the implementation of
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* {@code Chronology} must be registered as a Service implementing the {@code Chronology} interface
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* in the {@code META-INF/Services} file as per the specification of {@link java.util.ServiceLoader}.
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* The subclass must function according to the {@code Chronology} class description and must provide its
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* {@link java.time.chrono.Chronology#getId() chronlogy ID} and {@link Chronology#getCalendarType() calendar type}. </p>
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*
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* @implSpec
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* This abstract class must be implemented with care to ensure other classes operate correctly.
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* All implementations that can be instantiated must be final, immutable and thread-safe.
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* Subclasses should be Serializable wherever possible.
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*
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* @param <D> the ChronoLocalDate of this date-time
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* @since 1.8
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*/
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abstract class ChronoLocalDateImpl<D extends ChronoLocalDate>
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implements ChronoLocalDate, Temporal, TemporalAdjuster, 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 = 6282433883239719096L;
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/**
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* Casts the {@code Temporal} to {@code ChronoLocalDate} ensuring it bas the specified chronology.
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*
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* @param chrono the chronology to check for, not null
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* @param temporal a date-time to cast, not null
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* @return the date-time checked and cast to {@code ChronoLocalDate}, not null
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* @throws ClassCastException if the date-time cannot be cast to ChronoLocalDate
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* or the chronology is not equal this Chronology
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*/
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static <D extends ChronoLocalDate> D ensureValid(Chronology chrono, Temporal temporal) {
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@SuppressWarnings("unchecked")
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D other = (D) temporal;
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if (chrono.equals(other.getChronology()) == false) {
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throw new ClassCastException("Chronology mismatch, expected: " + chrono.getId() + ", actual: " + other.getChronology().getId());
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}
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return other;
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}
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//-----------------------------------------------------------------------
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/**
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* Creates an instance.
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*/
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ChronoLocalDateImpl() {
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}
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@Override
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@SuppressWarnings("unchecked")
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public D with(TemporalAdjuster adjuster) {
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return (D) ChronoLocalDate.super.with(adjuster);
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}
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@Override
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@SuppressWarnings("unchecked")
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public D with(TemporalField field, long value) {
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return (D) ChronoLocalDate.super.with(field, value);
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}
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//-----------------------------------------------------------------------
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@Override
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@SuppressWarnings("unchecked")
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public D plus(TemporalAmount amount) {
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return (D) ChronoLocalDate.super.plus(amount);
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}
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//-----------------------------------------------------------------------
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@Override
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@SuppressWarnings("unchecked")
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public D plus(long amountToAdd, TemporalUnit unit) {
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if (unit instanceof ChronoUnit chronoUnit) {
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switch (chronoUnit) {
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case DAYS: return plusDays(amountToAdd);
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case WEEKS: return plusDays(Math.multiplyExact(amountToAdd, 7));
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case MONTHS: return plusMonths(amountToAdd);
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case YEARS: return plusYears(amountToAdd);
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case DECADES: return plusYears(Math.multiplyExact(amountToAdd, 10));
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case CENTURIES: return plusYears(Math.multiplyExact(amountToAdd, 100));
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case MILLENNIA: return plusYears(Math.multiplyExact(amountToAdd, 1000));
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case ERAS: return with(ERA, Math.addExact(getLong(ERA), amountToAdd));
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}
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throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
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}
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return (D) ChronoLocalDate.super.plus(amountToAdd, unit);
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}
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@Override
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@SuppressWarnings("unchecked")
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public D minus(TemporalAmount amount) {
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return (D) ChronoLocalDate.super.minus(amount);
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}
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@Override
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@SuppressWarnings("unchecked")
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public D minus(long amountToSubtract, TemporalUnit unit) {
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return (D) ChronoLocalDate.super.minus(amountToSubtract, unit);
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}
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//-----------------------------------------------------------------------
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/**
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* Returns a copy of this date with the specified number of years added.
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* <p>
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* This adds the specified period in years to the date.
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* In some cases, adding years can cause the resulting date to become invalid.
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* If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure
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* that the result is valid. Typically this will select the last valid day of the month.
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* <p>
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* This instance is immutable and unaffected by this method call.
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*
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* @param yearsToAdd the years to add, may be negative
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* @return a date based on this one with the years added, not null
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* @throws DateTimeException if the result exceeds the supported date range
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*/
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abstract D plusYears(long yearsToAdd);
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/**
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* Returns a copy of this date with the specified number of months added.
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* <p>
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* This adds the specified period in months to the date.
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* In some cases, adding months can cause the resulting date to become invalid.
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* If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure
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* that the result is valid. Typically this will select the last valid day of the month.
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* <p>
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* This instance is immutable and unaffected by this method call.
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*
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* @param monthsToAdd the months to add, may be negative
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* @return a date based on this one with the months added, not null
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* @throws DateTimeException if the result exceeds the supported date range
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*/
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abstract D plusMonths(long monthsToAdd);
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/**
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* Returns a copy of this date with the specified number of weeks added.
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* <p>
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* This adds the specified period in weeks to the date.
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* In some cases, adding weeks can cause the resulting date to become invalid.
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* If this occurs, then other fields will be adjusted to ensure that the result is valid.
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* <p>
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* The default implementation uses {@link #plusDays(long)} using a 7 day week.
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* <p>
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* This instance is immutable and unaffected by this method call.
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*
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* @param weeksToAdd the weeks to add, may be negative
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* @return a date based on this one with the weeks added, not null
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* @throws DateTimeException if the result exceeds the supported date range
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*/
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D plusWeeks(long weeksToAdd) {
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return plusDays(Math.multiplyExact(weeksToAdd, 7));
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}
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/**
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* Returns a copy of this date with the specified number of days added.
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* <p>
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* This adds the specified period in days to the date.
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* <p>
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* This instance is immutable and unaffected by this method call.
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*
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* @param daysToAdd the days to add, may be negative
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* @return a date based on this one with the days added, not null
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* @throws DateTimeException if the result exceeds the supported date range
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*/
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abstract D plusDays(long daysToAdd);
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//-----------------------------------------------------------------------
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/**
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* Returns a copy of this date with the specified number of years subtracted.
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* <p>
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* This subtracts the specified period in years to the date.
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* In some cases, subtracting years can cause the resulting date to become invalid.
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* If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure
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* that the result is valid. Typically this will select the last valid day of the month.
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* <p>
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* The default implementation uses {@link #plusYears(long)}.
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* <p>
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* This instance is immutable and unaffected by this method call.
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*
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* @param yearsToSubtract the years to subtract, may be negative
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* @return a date based on this one with the years subtracted, not null
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* @throws DateTimeException if the result exceeds the supported date range
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*/
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@SuppressWarnings("unchecked")
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D minusYears(long yearsToSubtract) {
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return (yearsToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusYears(Long.MAX_VALUE)).plusYears(1) : plusYears(-yearsToSubtract));
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}
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/**
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* Returns a copy of this date with the specified number of months subtracted.
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* <p>
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* This subtracts the specified period in months to the date.
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* In some cases, subtracting months can cause the resulting date to become invalid.
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* If this occurs, then other fields, typically the day-of-month, will be adjusted to ensure
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* that the result is valid. Typically this will select the last valid day of the month.
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* <p>
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* The default implementation uses {@link #plusMonths(long)}.
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* <p>
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* This instance is immutable and unaffected by this method call.
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*
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* @param monthsToSubtract the months to subtract, may be negative
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* @return a date based on this one with the months subtracted, not null
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* @throws DateTimeException if the result exceeds the supported date range
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*/
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@SuppressWarnings("unchecked")
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D minusMonths(long monthsToSubtract) {
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return (monthsToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusMonths(Long.MAX_VALUE)).plusMonths(1) : plusMonths(-monthsToSubtract));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a copy of this date with the specified number of weeks subtracted.
|
||
|
|
* <p>
|
||
|
|
* This subtracts the specified period in weeks to the date.
|
||
|
|
* In some cases, subtracting weeks can cause the resulting date to become invalid.
|
||
|
|
* If this occurs, then other fields will be adjusted to ensure that the result is valid.
|
||
|
|
* <p>
|
||
|
|
* The default implementation uses {@link #plusWeeks(long)}.
|
||
|
|
* <p>
|
||
|
|
* This instance is immutable and unaffected by this method call.
|
||
|
|
*
|
||
|
|
* @param weeksToSubtract the weeks to subtract, may be negative
|
||
|
|
* @return a date based on this one with the weeks subtracted, not null
|
||
|
|
* @throws DateTimeException if the result exceeds the supported date range
|
||
|
|
*/
|
||
|
|
@SuppressWarnings("unchecked")
|
||
|
|
D minusWeeks(long weeksToSubtract) {
|
||
|
|
return (weeksToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusWeeks(Long.MAX_VALUE)).plusWeeks(1) : plusWeeks(-weeksToSubtract));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a copy of this date with the specified number of days subtracted.
|
||
|
|
* <p>
|
||
|
|
* This subtracts the specified period in days to the date.
|
||
|
|
* <p>
|
||
|
|
* The default implementation uses {@link #plusDays(long)}.
|
||
|
|
* <p>
|
||
|
|
* This instance is immutable and unaffected by this method call.
|
||
|
|
*
|
||
|
|
* @param daysToSubtract the days to subtract, may be negative
|
||
|
|
* @return a date based on this one with the days subtracted, not null
|
||
|
|
* @throws DateTimeException if the result exceeds the supported date range
|
||
|
|
*/
|
||
|
|
@SuppressWarnings("unchecked")
|
||
|
|
D minusDays(long daysToSubtract) {
|
||
|
|
return (daysToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusDays(Long.MAX_VALUE)).plusDays(1) : plusDays(-daysToSubtract));
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
@Override
|
||
|
|
public long until(Temporal endExclusive, TemporalUnit unit) {
|
||
|
|
Objects.requireNonNull(endExclusive, "endExclusive");
|
||
|
|
ChronoLocalDate end = getChronology().date(endExclusive);
|
||
|
|
if (unit instanceof ChronoUnit chronoUnit) {
|
||
|
|
switch (chronoUnit) {
|
||
|
|
case DAYS: return daysUntil(end);
|
||
|
|
case WEEKS: return daysUntil(end) / 7;
|
||
|
|
case MONTHS: return monthsUntil(end);
|
||
|
|
case YEARS: return monthsUntil(end) / 12;
|
||
|
|
case DECADES: return monthsUntil(end) / 120;
|
||
|
|
case CENTURIES: return monthsUntil(end) / 1200;
|
||
|
|
case MILLENNIA: return monthsUntil(end) / 12000;
|
||
|
|
case ERAS: return end.getLong(ERA) - getLong(ERA);
|
||
|
|
}
|
||
|
|
throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
|
||
|
|
}
|
||
|
|
Objects.requireNonNull(unit, "unit");
|
||
|
|
return unit.between(this, end);
|
||
|
|
}
|
||
|
|
|
||
|
|
private long daysUntil(ChronoLocalDate end) {
|
||
|
|
return end.toEpochDay() - toEpochDay(); // no overflow
|
||
|
|
}
|
||
|
|
|
||
|
|
private long monthsUntil(ChronoLocalDate end) {
|
||
|
|
ValueRange range = getChronology().range(MONTH_OF_YEAR);
|
||
|
|
if (range.getMaximum() != 12) {
|
||
|
|
throw new IllegalStateException("ChronoLocalDateImpl only supports Chronologies with 12 months per year");
|
||
|
|
}
|
||
|
|
long packed1 = getLong(PROLEPTIC_MONTH) * 32L + get(DAY_OF_MONTH); // no overflow
|
||
|
|
long packed2 = end.getLong(PROLEPTIC_MONTH) * 32L + end.get(DAY_OF_MONTH); // no overflow
|
||
|
|
return (packed2 - packed1) / 32;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public boolean equals(Object obj) {
|
||
|
|
if (this == obj) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (obj instanceof ChronoLocalDate) {
|
||
|
|
return compareTo((ChronoLocalDate) obj) == 0;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public int hashCode() {
|
||
|
|
long epDay = toEpochDay();
|
||
|
|
return getChronology().hashCode() ^ ((int) (epDay ^ (epDay >>> 32)));
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public String toString() {
|
||
|
|
// getLong() reduces chances of exceptions in toString()
|
||
|
|
long yoe = getLong(YEAR_OF_ERA);
|
||
|
|
long moy = getLong(MONTH_OF_YEAR);
|
||
|
|
long dom = getLong(DAY_OF_MONTH);
|
||
|
|
StringBuilder buf = new StringBuilder(30);
|
||
|
|
buf.append(getChronology().toString())
|
||
|
|
.append(" ")
|
||
|
|
.append(getEra())
|
||
|
|
.append(" ")
|
||
|
|
.append(yoe)
|
||
|
|
.append(moy < 10 ? "-0" : "-").append(moy)
|
||
|
|
.append(dom < 10 ? "-0" : "-").append(dom);
|
||
|
|
return buf.toString();
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|