author | darcy |
Thu, 29 Aug 2019 16:31:34 -0700 | |
changeset 57956 | e0b8b019d2f5 |
parent 54206 | 003cc64366da |
permissions | -rw-r--r-- |
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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) { |
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ChronoUnit f = (ChronoUnit) unit; |
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switch (f) { |
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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)); |
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} |
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/** |
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* Returns a copy of this date with the specified number of weeks subtracted. |
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* <p> |
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* This subtracts the specified period in weeks to the date. |
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* In some cases, subtracting 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 #plusWeeks(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 weeksToSubtract the weeks to subtract, may be negative |
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* @return a date based on this one with the weeks 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 minusWeeks(long weeksToSubtract) { |
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return (weeksToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusWeeks(Long.MAX_VALUE)).plusWeeks(1) : plusWeeks(-weeksToSubtract)); |
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} |
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/** |
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* Returns a copy of this date with the specified number of days subtracted. |
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* <p> |
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* This subtracts the specified period in days to the date. |
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* <p> |
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* The default implementation uses {@link #plusDays(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 daysToSubtract the days to subtract, may be negative |
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* @return a date based on this one with the days 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 minusDays(long daysToSubtract) { |
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return (daysToSubtract == Long.MIN_VALUE ? ((ChronoLocalDateImpl<D>)plusDays(Long.MAX_VALUE)).plusDays(1) : plusDays(-daysToSubtract)); |
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} |
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//----------------------------------------------------------------------- |
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@Override |
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377 |
public long until(Temporal endExclusive, TemporalUnit unit) { |
0952771e3e25
8024835: Change until() to accept any compatible temporal
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parents:
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changeset
|
378 |
Objects.requireNonNull(endExclusive, "endExclusive"); |
0952771e3e25
8024835: Change until() to accept any compatible temporal
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parents:
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diff
changeset
|
379 |
ChronoLocalDate end = getChronology().date(endExclusive); |
15658 | 380 |
if (unit instanceof ChronoUnit) { |
16852 | 381 |
switch ((ChronoUnit) unit) { |
382 |
case DAYS: return daysUntil(end); |
|
383 |
case WEEKS: return daysUntil(end) / 7; |
|
384 |
case MONTHS: return monthsUntil(end); |
|
385 |
case YEARS: return monthsUntil(end) / 12; |
|
386 |
case DECADES: return monthsUntil(end) / 120; |
|
387 |
case CENTURIES: return monthsUntil(end) / 1200; |
|
388 |
case MILLENNIA: return monthsUntil(end) / 12000; |
|
389 |
case ERAS: return end.getLong(ERA) - getLong(ERA); |
|
390 |
} |
|
19030 | 391 |
throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); |
15658 | 392 |
} |
20520
0952771e3e25
8024835: Change until() to accept any compatible temporal
rriggs
parents:
20518
diff
changeset
|
393 |
Objects.requireNonNull(unit, "unit"); |
0952771e3e25
8024835: Change until() to accept any compatible temporal
rriggs
parents:
20518
diff
changeset
|
394 |
return unit.between(this, end); |
15658 | 395 |
} |
396 |
||
19030 | 397 |
private long daysUntil(ChronoLocalDate end) { |
16852 | 398 |
return end.toEpochDay() - toEpochDay(); // no overflow |
399 |
} |
|
400 |
||
19030 | 401 |
private long monthsUntil(ChronoLocalDate end) { |
16852 | 402 |
ValueRange range = getChronology().range(MONTH_OF_YEAR); |
403 |
if (range.getMaximum() != 12) { |
|
20518 | 404 |
throw new IllegalStateException("ChronoLocalDateImpl only supports Chronologies with 12 months per year"); |
16852 | 405 |
} |
406 |
long packed1 = getLong(PROLEPTIC_MONTH) * 32L + get(DAY_OF_MONTH); // no overflow |
|
407 |
long packed2 = end.getLong(PROLEPTIC_MONTH) * 32L + end.get(DAY_OF_MONTH); // no overflow |
|
408 |
return (packed2 - packed1) / 32; |
|
409 |
} |
|
410 |
||
15658 | 411 |
@Override |
412 |
public boolean equals(Object obj) { |
|
413 |
if (this == obj) { |
|
414 |
return true; |
|
415 |
} |
|
416 |
if (obj instanceof ChronoLocalDate) { |
|
19030 | 417 |
return compareTo((ChronoLocalDate) obj) == 0; |
15658 | 418 |
} |
419 |
return false; |
|
420 |
} |
|
421 |
||
422 |
@Override |
|
423 |
public int hashCode() { |
|
424 |
long epDay = toEpochDay(); |
|
425 |
return getChronology().hashCode() ^ ((int) (epDay ^ (epDay >>> 32))); |
|
426 |
} |
|
427 |
||
428 |
@Override |
|
429 |
public String toString() { |
|
430 |
// getLong() reduces chances of exceptions in toString() |
|
431 |
long yoe = getLong(YEAR_OF_ERA); |
|
432 |
long moy = getLong(MONTH_OF_YEAR); |
|
433 |
long dom = getLong(DAY_OF_MONTH); |
|
434 |
StringBuilder buf = new StringBuilder(30); |
|
435 |
buf.append(getChronology().toString()) |
|
436 |
.append(" ") |
|
437 |
.append(getEra()) |
|
438 |
.append(" ") |
|
439 |
.append(yoe) |
|
440 |
.append(moy < 10 ? "-0" : "-").append(moy) |
|
441 |
.append(dom < 10 ? "-0" : "-").append(dom); |
|
442 |
return buf.toString(); |
|
443 |
} |
|
444 |
||
445 |
} |