457 lines
18 KiB
Java
457 lines
18 KiB
Java
/*
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* Copyright (c) 2012, 2020, 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.chrono;
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import static java.time.temporal.ChronoField.EPOCH_DAY;
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import java.io.IOException;
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import java.io.InvalidObjectException;
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import java.io.ObjectInput;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutput;
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import java.io.Serializable;
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import java.time.LocalTime;
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import java.time.ZoneId;
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import java.time.temporal.ChronoField;
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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.TemporalField;
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import java.time.temporal.TemporalUnit;
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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-time without a time-zone for the calendar neutral API.
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* <p>
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* {@code ChronoLocalDateTime} is an immutable date-time object that represents a date-time, often
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* viewed as year-month-day-hour-minute-second. This object can also access other
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* fields such as day-of-year, day-of-week and week-of-year.
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* <p>
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* This class stores all date and time fields, to a precision of nanoseconds.
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* It does not store or represent a time-zone. For example, the value
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* "2nd October 2007 at 13:45.30.123456789" can be stored in an {@code ChronoLocalDateTime}.
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*
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* @implSpec
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* This class is immutable and thread-safe.
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* @serial
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* @param <D> the concrete type for the date of this date-time
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* @since 1.8
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*/
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final class ChronoLocalDateTimeImpl<D extends ChronoLocalDate>
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implements ChronoLocalDateTime<D>, 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 = 4556003607393004514L;
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/**
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* Hours per day.
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*/
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static final int HOURS_PER_DAY = 24;
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/**
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* Minutes per hour.
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*/
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static final int MINUTES_PER_HOUR = 60;
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/**
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* Minutes per day.
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*/
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static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY;
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/**
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* Seconds per minute.
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*/
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static final int SECONDS_PER_MINUTE = 60;
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/**
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* Seconds per hour.
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*/
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static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR;
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/**
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* Seconds per day.
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*/
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static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY;
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/**
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* Milliseconds per day.
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*/
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static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L;
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/**
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* Microseconds per day.
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*/
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static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L;
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/**
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* Nanos per second.
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*/
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static final long NANOS_PER_SECOND = 1000_000_000L;
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/**
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* Nanos per minute.
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*/
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static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE;
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/**
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* Nanos per hour.
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*/
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static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR;
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/**
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* Nanos per day.
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*/
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static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY;
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/**
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* The date part.
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*/
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private final transient D date;
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/**
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* The time part.
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*/
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private final transient LocalTime time;
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//-----------------------------------------------------------------------
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/**
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* Obtains an instance of {@code ChronoLocalDateTime} from a date and time.
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*
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* @param date the local date, not null
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* @param time the local time, not null
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* @return the local date-time, not null
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*/
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static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> of(R date, LocalTime time) {
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return new ChronoLocalDateTimeImpl<>(date, time);
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}
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/**
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* Casts the {@code Temporal} to {@code ChronoLocalDateTime} 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 ChronoLocalDateTime}, not null
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* @throws ClassCastException if the date-time cannot be cast to ChronoLocalDateTimeImpl
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* or the chronology is not equal this Chronology
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*/
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static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> ensureValid(Chronology chrono, Temporal temporal) {
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@SuppressWarnings("unchecked")
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ChronoLocalDateTimeImpl<R> other = (ChronoLocalDateTimeImpl<R>) temporal;
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if (chrono.equals(other.getChronology()) == false) {
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throw new ClassCastException("Chronology mismatch, required: " + chrono.getId()
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+ ", 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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* Constructor.
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*
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* @param date the date part of the date-time, not null
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* @param time the time part of the date-time, not null
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*/
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private ChronoLocalDateTimeImpl(D date, LocalTime time) {
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Objects.requireNonNull(date, "date");
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Objects.requireNonNull(time, "time");
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this.date = date;
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this.time = time;
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}
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/**
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* Returns a copy of this date-time with the new date and time, checking
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* to see if a new object is in fact required.
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*
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* @param newDate the date of the new date-time, not null
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* @param newTime the time of the new date-time, not null
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* @return the date-time, not null
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*/
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private ChronoLocalDateTimeImpl<D> with(Temporal newDate, LocalTime newTime) {
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if (date == newDate && time == newTime) {
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return this;
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}
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// Validate that the new Temporal is a ChronoLocalDate (and not something else)
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D cd = ChronoLocalDateImpl.ensureValid(date.getChronology(), newDate);
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return new ChronoLocalDateTimeImpl<>(cd, newTime);
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}
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//-----------------------------------------------------------------------
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@Override
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public D toLocalDate() {
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return date;
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}
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@Override
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public LocalTime toLocalTime() {
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return time;
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}
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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 chronoField) {
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return chronoField.isDateBased() || chronoField.isTimeBased();
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}
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return field != null && field.isSupportedBy(this);
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}
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@Override
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public ValueRange range(TemporalField field) {
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if (field instanceof ChronoField chronoField) {
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return (chronoField.isTimeBased() ? time.range(field) : date.range(field));
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}
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return field.rangeRefinedBy(this);
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}
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@Override
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public int get(TemporalField field) {
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if (field instanceof ChronoField chronoField) {
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return (chronoField.isTimeBased() ? time.get(field) : date.get(field));
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}
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return range(field).checkValidIntValue(getLong(field), field);
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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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return (chronoField.isTimeBased() ? time.getLong(field) : date.getLong(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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@SuppressWarnings("unchecked")
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@Override
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public ChronoLocalDateTimeImpl<D> with(TemporalAdjuster adjuster) {
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if (adjuster instanceof ChronoLocalDate) {
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// The Chronology is checked in with(date,time)
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return with((ChronoLocalDate) adjuster, time);
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} else if (adjuster instanceof LocalTime) {
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return with(date, (LocalTime) adjuster);
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} else if (adjuster instanceof ChronoLocalDateTimeImpl) {
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return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster);
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}
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return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster.adjustInto(this));
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}
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@Override
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public ChronoLocalDateTimeImpl<D> with(TemporalField field, long newValue) {
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if (field instanceof ChronoField chronoField) {
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if (chronoField.isTimeBased()) {
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return with(date, time.with(field, newValue));
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} else {
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return with(date.with(field, newValue), time);
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}
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}
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return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), field.adjustInto(this, newValue));
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}
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//-----------------------------------------------------------------------
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@Override
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public ChronoLocalDateTimeImpl<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 NANOS: return plusNanos(amountToAdd);
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case MICROS: return plusDays(amountToAdd / MICROS_PER_DAY).plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);
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case MILLIS: return plusDays(amountToAdd / MILLIS_PER_DAY).plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000000);
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case SECONDS: return plusSeconds(amountToAdd);
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case MINUTES: return plusMinutes(amountToAdd);
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case HOURS: return plusHours(amountToAdd);
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case HALF_DAYS: return plusDays(amountToAdd / 256).plusHours((amountToAdd % 256) * 12); // no overflow (256 is multiple of 2)
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}
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return with(date.plus(amountToAdd, unit), time);
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}
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return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), unit.addTo(this, amountToAdd));
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}
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private ChronoLocalDateTimeImpl<D> plusDays(long days) {
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return with(date.plus(days, ChronoUnit.DAYS), time);
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}
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private ChronoLocalDateTimeImpl<D> plusHours(long hours) {
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return plusWithOverflow(date, hours, 0, 0, 0);
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}
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private ChronoLocalDateTimeImpl<D> plusMinutes(long minutes) {
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return plusWithOverflow(date, 0, minutes, 0, 0);
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}
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ChronoLocalDateTimeImpl<D> plusSeconds(long seconds) {
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return plusWithOverflow(date, 0, 0, seconds, 0);
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}
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private ChronoLocalDateTimeImpl<D> plusNanos(long nanos) {
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return plusWithOverflow(date, 0, 0, 0, nanos);
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}
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//-----------------------------------------------------------------------
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private ChronoLocalDateTimeImpl<D> plusWithOverflow(D newDate, long hours, long minutes, long seconds, long nanos) {
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// 9223372036854775808 long, 2147483648 int
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if ((hours | minutes | seconds | nanos) == 0) {
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return with(newDate, time);
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}
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long totDays = nanos / NANOS_PER_DAY + // max/24*60*60*1B
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seconds / SECONDS_PER_DAY + // max/24*60*60
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minutes / MINUTES_PER_DAY + // max/24*60
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hours / HOURS_PER_DAY; // max/24
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long totNanos = nanos % NANOS_PER_DAY + // max 86400000000000
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(seconds % SECONDS_PER_DAY) * NANOS_PER_SECOND + // max 86400000000000
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(minutes % MINUTES_PER_DAY) * NANOS_PER_MINUTE + // max 86400000000000
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(hours % HOURS_PER_DAY) * NANOS_PER_HOUR; // max 86400000000000
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long curNoD = time.toNanoOfDay(); // max 86400000000000
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totNanos = totNanos + curNoD; // total 432000000000000
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totDays += Math.floorDiv(totNanos, NANOS_PER_DAY);
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long newNoD = Math.floorMod(totNanos, NANOS_PER_DAY);
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LocalTime newTime = (newNoD == curNoD ? time : LocalTime.ofNanoOfDay(newNoD));
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return with(newDate.plus(totDays, ChronoUnit.DAYS), newTime);
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}
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//-----------------------------------------------------------------------
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@Override
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public ChronoZonedDateTime<D> atZone(ZoneId zone) {
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return ChronoZonedDateTimeImpl.ofBest(this, zone, null);
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}
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//-----------------------------------------------------------------------
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@Override
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public long until(Temporal endExclusive, TemporalUnit unit) {
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Objects.requireNonNull(endExclusive, "endExclusive");
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@SuppressWarnings("unchecked")
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ChronoLocalDateTime<D> end = (ChronoLocalDateTime<D>) getChronology().localDateTime(endExclusive);
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if (unit instanceof ChronoUnit chronoUnit) {
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if (unit.isTimeBased()) {
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long amount = end.getLong(EPOCH_DAY) - date.getLong(EPOCH_DAY);
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switch (chronoUnit) {
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case NANOS: amount = Math.multiplyExact(amount, NANOS_PER_DAY); break;
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case MICROS: amount = Math.multiplyExact(amount, MICROS_PER_DAY); break;
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case MILLIS: amount = Math.multiplyExact(amount, MILLIS_PER_DAY); break;
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case SECONDS: amount = Math.multiplyExact(amount, SECONDS_PER_DAY); break;
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case MINUTES: amount = Math.multiplyExact(amount, MINUTES_PER_DAY); break;
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case HOURS: amount = Math.multiplyExact(amount, HOURS_PER_DAY); break;
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case HALF_DAYS: amount = Math.multiplyExact(amount, 2); break;
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}
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return Math.addExact(amount, time.until(end.toLocalTime(), unit));
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}
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ChronoLocalDate endDate = end.toLocalDate();
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if (end.toLocalTime().isBefore(time)) {
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endDate = endDate.minus(1, ChronoUnit.DAYS);
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}
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return date.until(endDate, unit);
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}
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Objects.requireNonNull(unit, "unit");
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return unit.between(this, end);
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}
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//-----------------------------------------------------------------------
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/**
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* Writes the ChronoLocalDateTime using a
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* <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
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* @serialData
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* <pre>
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* out.writeByte(2); // identifies a ChronoLocalDateTime
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* out.writeObject(toLocalDate());
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* out.writeObject(toLocalTime());
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* </pre>
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*
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* @return the instance of {@code Ser}, not null
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*/
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@java.io.Serial
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private Object writeReplace() {
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return new Ser(Ser.CHRONO_LOCAL_DATE_TIME_TYPE, this);
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}
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/**
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* Defend against malicious streams.
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*
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* @param s the stream to read
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* @throws InvalidObjectException always
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*/
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@java.io.Serial
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private void readObject(ObjectInputStream s) throws InvalidObjectException {
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throw new InvalidObjectException("Deserialization via serialization delegate");
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}
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void writeExternal(ObjectOutput out) throws IOException {
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out.writeObject(date);
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out.writeObject(time);
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}
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static ChronoLocalDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
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ChronoLocalDate date = (ChronoLocalDate) in.readObject();
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LocalTime time = (LocalTime) in.readObject();
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return date.atTime(time);
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}
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//-----------------------------------------------------------------------
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (obj instanceof ChronoLocalDateTime) {
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return compareTo((ChronoLocalDateTime<?>) obj) == 0;
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}
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return false;
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}
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@Override
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public int hashCode() {
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return toLocalDate().hashCode() ^ toLocalTime().hashCode();
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}
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@Override
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public String toString() {
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return toLocalDate().toString() + 'T' + toLocalTime().toString();
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}
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}
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