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	/*
	* Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos
	*
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* * Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	*
	* * Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	*
	* * Neither the name of JSR-310 nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	package java.time.chrono;

	import static java.time.temporal.ChronoField.EPOCH_DAY;

	import java.io.IOException;
	import java.io.InvalidObjectException;
	import java.io.ObjectInput;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutput;
	import java.io.Serializable;
	import java.time.LocalTime;
	import java.time.ZoneId;
	import java.time.temporal.ChronoField;
	import java.time.temporal.ChronoUnit;
	import java.time.temporal.Temporal;
	import java.time.temporal.TemporalAdjuster;
	import java.time.temporal.TemporalField;
	import java.time.temporal.TemporalUnit;
	import java.time.temporal.ValueRange;
	import java.util.Objects;

	/**
	* A date-time without a time-zone for the calendar neutral API.
	* <p>
	* {@code ChronoLocalDateTime} is an immutable date-time object that represents a date-time, often
	* viewed as year-month-day-hour-minute-second. This object can also access other
	* fields such as day-of-year, day-of-week and week-of-year.
	* <p>
	* This class stores all date and time fields, to a precision of nanoseconds.
	* It does not store or represent a time-zone. For example, the value
	* "2nd October 2007 at 13:45.30.123456789" can be stored in an {@code ChronoLocalDateTime}.
	*
	* @implSpec
	* This class is immutable and thread-safe.
	* @serial
	* @param <D> the concrete type for the date of this date-time
	* @since 1.8
	*/
	final class ChronoLocalDateTimeImpl<D extends ChronoLocalDate>
	implements ChronoLocalDateTime<D>, Temporal, TemporalAdjuster, Serializable {

	/**
	* Serialization version.
	*/
	@java.io.Serial
	private static final long serialVersionUID = 4556003607393004514L;
	/**
	* Hours per day.
	*/
	static final int HOURS_PER_DAY = 24;
	/**
	* Minutes per hour.
	*/
	static final int MINUTES_PER_HOUR = 60;
	/**
	* Minutes per day.
	*/
	static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY;
	/**
	* Seconds per minute.
	*/
	static final int SECONDS_PER_MINUTE = 60;
	/**
	* Seconds per hour.
	*/
	static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR;
	/**
	* Seconds per day.
	*/
	static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY;
	/**
	* Milliseconds per day.
	*/
	static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L;
	/**
	* Microseconds per day.
	*/
	static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L;
	/**
	* Nanos per second.
	*/
	static final long NANOS_PER_SECOND = 1000_000_000L;
	/**
	* Nanos per minute.
	*/
	static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE;
	/**
	* Nanos per hour.
	*/
	static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR;
	/**
	* Nanos per day.
	*/
	static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY;

	/**
	* The date part.
	*/
	private final transient D date;
	/**
	* The time part.
	*/
	private final transient LocalTime time;

	//-----------------------------------------------------------------------
	/**
	* Obtains an instance of {@code ChronoLocalDateTime} from a date and time.
	*
	* @param date the local date, not null
	* @param time the local time, not null
	* @return the local date-time, not null
	*/
	static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> of(R date, LocalTime time) {
	return new ChronoLocalDateTimeImpl<>(date, time);
	}

	/**
	* Casts the {@code Temporal} to {@code ChronoLocalDateTime} ensuring it bas the specified chronology.
	*
	* @param chrono the chronology to check for, not null
	* @param temporal a date-time to cast, not null
	* @return the date-time checked and cast to {@code ChronoLocalDateTime}, not null
	* @throws ClassCastException if the date-time cannot be cast to ChronoLocalDateTimeImpl
	* or the chronology is not equal this Chronology
	*/
	static <R extends ChronoLocalDate> ChronoLocalDateTimeImpl<R> ensureValid(Chronology chrono, Temporal temporal) {
	@SuppressWarnings("unchecked")
	ChronoLocalDateTimeImpl<R> other = (ChronoLocalDateTimeImpl<R>) temporal;
	if (chrono.equals(other.getChronology()) == false) {
	throw new ClassCastException("Chronology mismatch, required: " + chrono.getId()
	+ ", actual: " + other.getChronology().getId());
	}
	return other;
	}

	/**
	* Constructor.
	*
	* @param date the date part of the date-time, not null
	* @param time the time part of the date-time, not null
	*/
	private ChronoLocalDateTimeImpl(D date, LocalTime time) {
	Objects.requireNonNull(date, "date");
	Objects.requireNonNull(time, "time");
	this.date = date;
	this.time = time;
	}

	/**
	* Returns a copy of this date-time with the new date and time, checking
	* to see if a new object is in fact required.
	*
	* @param newDate the date of the new date-time, not null
	* @param newTime the time of the new date-time, not null
	* @return the date-time, not null
	*/
	private ChronoLocalDateTimeImpl<D> with(Temporal newDate, LocalTime newTime) {
	if (date == newDate && time == newTime) {
	return this;
	}
	// Validate that the new Temporal is a ChronoLocalDate (and not something else)
	D cd = ChronoLocalDateImpl.ensureValid(date.getChronology(), newDate);
	return new ChronoLocalDateTimeImpl<>(cd, newTime);
	}

	//-----------------------------------------------------------------------
	@Override
	public D toLocalDate() {
	return date;
	}

	@Override
	public LocalTime toLocalTime() {
	return time;
	}

	//-----------------------------------------------------------------------
	@Override
	public boolean isSupported(TemporalField field) {
	if (field instanceof ChronoField chronoField) {
	return chronoField.isDateBased() \|\| chronoField.isTimeBased();
	}
	return field != null && field.isSupportedBy(this);
	}

	@Override
	public ValueRange range(TemporalField field) {
	if (field instanceof ChronoField chronoField) {
	return (chronoField.isTimeBased() ? time.range(field) : date.range(field));
	}
	return field.rangeRefinedBy(this);
	}

	@Override
	public int get(TemporalField field) {
	if (field instanceof ChronoField chronoField) {
	return (chronoField.isTimeBased() ? time.get(field) : date.get(field));
	}
	return range(field).checkValidIntValue(getLong(field), field);
	}

	@Override
	public long getLong(TemporalField field) {
	if (field instanceof ChronoField chronoField) {
	return (chronoField.isTimeBased() ? time.getLong(field) : date.getLong(field));
	}
	return field.getFrom(this);
	}

	//-----------------------------------------------------------------------
	@SuppressWarnings("unchecked")
	@Override
	public ChronoLocalDateTimeImpl<D> with(TemporalAdjuster adjuster) {
	if (adjuster instanceof ChronoLocalDate) {
	// The Chronology is checked in with(date,time)
	return with((ChronoLocalDate) adjuster, time);
	} else if (adjuster instanceof LocalTime) {
	return with(date, (LocalTime) adjuster);
	} else if (adjuster instanceof ChronoLocalDateTimeImpl) {
	return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster);
	}
	return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), (ChronoLocalDateTimeImpl<?>) adjuster.adjustInto(this));
	}

	@Override
	public ChronoLocalDateTimeImpl<D> with(TemporalField field, long newValue) {
	if (field instanceof ChronoField chronoField) {
	if (chronoField.isTimeBased()) {
	return with(date, time.with(field, newValue));
	} else {
	return with(date.with(field, newValue), time);
	}
	}
	return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), field.adjustInto(this, newValue));
	}

	//-----------------------------------------------------------------------
	@Override
	public ChronoLocalDateTimeImpl<D> plus(long amountToAdd, TemporalUnit unit) {
	if (unit instanceof ChronoUnit chronoUnit) {
	switch (chronoUnit) {
	case NANOS: return plusNanos(amountToAdd);
	case MICROS: return plusDays(amountToAdd / MICROS_PER_DAY).plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);
	case MILLIS: return plusDays(amountToAdd / MILLIS_PER_DAY).plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000000);
	case SECONDS: return plusSeconds(amountToAdd);
	case MINUTES: return plusMinutes(amountToAdd);
	case HOURS: return plusHours(amountToAdd);
	case HALF_DAYS: return plusDays(amountToAdd / 256).plusHours((amountToAdd % 256) * 12); // no overflow (256 is multiple of 2)
	}
	return with(date.plus(amountToAdd, unit), time);
	}
	return ChronoLocalDateTimeImpl.ensureValid(date.getChronology(), unit.addTo(this, amountToAdd));
	}

	private ChronoLocalDateTimeImpl<D> plusDays(long days) {
	return with(date.plus(days, ChronoUnit.DAYS), time);
	}

	private ChronoLocalDateTimeImpl<D> plusHours(long hours) {
	return plusWithOverflow(date, hours, 0, 0, 0);
	}

	private ChronoLocalDateTimeImpl<D> plusMinutes(long minutes) {
	return plusWithOverflow(date, 0, minutes, 0, 0);
	}

	ChronoLocalDateTimeImpl<D> plusSeconds(long seconds) {
	return plusWithOverflow(date, 0, 0, seconds, 0);
	}

	private ChronoLocalDateTimeImpl<D> plusNanos(long nanos) {
	return plusWithOverflow(date, 0, 0, 0, nanos);
	}

	//-----------------------------------------------------------------------
	private ChronoLocalDateTimeImpl<D> plusWithOverflow(D newDate, long hours, long minutes, long seconds, long nanos) {
	// 9223372036854775808 long, 2147483648 int
	if ((hours \| minutes \| seconds \| nanos) == 0) {
	return with(newDate, time);
	}
	long totDays = nanos / NANOS_PER_DAY + // max/246060*1B
	seconds / SECONDS_PER_DAY + // max/246060
	minutes / MINUTES_PER_DAY + // max/24*60
	hours / HOURS_PER_DAY; // max/24
	long totNanos = nanos % NANOS_PER_DAY + // max 86400000000000
	(seconds % SECONDS_PER_DAY) * NANOS_PER_SECOND + // max 86400000000000
	(minutes % MINUTES_PER_DAY) * NANOS_PER_MINUTE + // max 86400000000000
	(hours % HOURS_PER_DAY) * NANOS_PER_HOUR; // max 86400000000000
	long curNoD = time.toNanoOfDay(); // max 86400000000000
	totNanos = totNanos + curNoD; // total 432000000000000
	totDays += Math.floorDiv(totNanos, NANOS_PER_DAY);
	long newNoD = Math.floorMod(totNanos, NANOS_PER_DAY);
	LocalTime newTime = (newNoD == curNoD ? time : LocalTime.ofNanoOfDay(newNoD));
	return with(newDate.plus(totDays, ChronoUnit.DAYS), newTime);
	}

	//-----------------------------------------------------------------------
	@Override
	public ChronoZonedDateTime<D> atZone(ZoneId zone) {
	return ChronoZonedDateTimeImpl.ofBest(this, zone, null);
	}

	//-----------------------------------------------------------------------
	@Override
	public long until(Temporal endExclusive, TemporalUnit unit) {
	Objects.requireNonNull(endExclusive, "endExclusive");
	@SuppressWarnings("unchecked")
	ChronoLocalDateTime<D> end = (ChronoLocalDateTime<D>) getChronology().localDateTime(endExclusive);
	if (unit instanceof ChronoUnit chronoUnit) {
	if (unit.isTimeBased()) {
	long amount = end.getLong(EPOCH_DAY) - date.getLong(EPOCH_DAY);
	switch (chronoUnit) {
	case NANOS: amount = Math.multiplyExact(amount, NANOS_PER_DAY); break;
	case MICROS: amount = Math.multiplyExact(amount, MICROS_PER_DAY); break;
	case MILLIS: amount = Math.multiplyExact(amount, MILLIS_PER_DAY); break;
	case SECONDS: amount = Math.multiplyExact(amount, SECONDS_PER_DAY); break;
	case MINUTES: amount = Math.multiplyExact(amount, MINUTES_PER_DAY); break;
	case HOURS: amount = Math.multiplyExact(amount, HOURS_PER_DAY); break;
	case HALF_DAYS: amount = Math.multiplyExact(amount, 2); break;
	}
	return Math.addExact(amount, time.until(end.toLocalTime(), unit));
	}
	ChronoLocalDate endDate = end.toLocalDate();
	if (end.toLocalTime().isBefore(time)) {
	endDate = endDate.minus(1, ChronoUnit.DAYS);
	}
	return date.until(endDate, unit);
	}
	Objects.requireNonNull(unit, "unit");
	return unit.between(this, end);
	}

	//-----------------------------------------------------------------------
	/**
	* Writes the ChronoLocalDateTime using a
	* <a href="{@docRoot}/serialized-form.html#java.time.chrono.Ser">dedicated serialized form</a>.
	* @serialData
	* <pre>
	* out.writeByte(2); // identifies a ChronoLocalDateTime
	* out.writeObject(toLocalDate());
	* out.writeObject(toLocalTime());
	* </pre>
	*
	* @return the instance of {@code Ser}, not null
	*/
	@java.io.Serial
	private Object writeReplace() {
	return new Ser(Ser.CHRONO_LOCAL_DATE_TIME_TYPE, this);
	}

	/**
	* Defend against malicious streams.
	*
	* @param s the stream to read
	* @throws InvalidObjectException always
	*/
	@java.io.Serial
	private void readObject(ObjectInputStream s) throws InvalidObjectException {
	throw new InvalidObjectException("Deserialization via serialization delegate");
	}

	void writeExternal(ObjectOutput out) throws IOException {
	out.writeObject(date);
	out.writeObject(time);
	}

	static ChronoLocalDateTime<?> readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
	ChronoLocalDate date = (ChronoLocalDate) in.readObject();
	LocalTime time = (LocalTime) in.readObject();
	return date.atTime(time);
	}

	//-----------------------------------------------------------------------
	@Override
	public boolean equals(Object obj) {
	if (this == obj) {
	return true;
	}
	if (obj instanceof ChronoLocalDateTime) {
	return compareTo((ChronoLocalDateTime<?>) obj) == 0;
	}
	return false;
	}

	@Override
	public int hashCode() {
	return toLocalDate().hashCode() ^ toLocalTime().hashCode();
	}

	@Override
	public String toString() {
	return toLocalDate().toString() + 'T' + toLocalTime().toString();
	}

	}

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