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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * This code is free software; you can redistribute it and/or modify it

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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

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/*

 * 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

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 */

package java.time;

import static java.time.LocalTime.NANOS_PER_HOUR;

import static java.time.LocalTime.NANOS_PER_MINUTE;

import static java.time.LocalTime.NANOS_PER_SECOND;

import static java.time.LocalTime.SECONDS_PER_DAY;

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

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

import static java.time.temporal.ChronoUnit.NANOS;

import java.io.IOException;

import java.io.ObjectInput;

import java.io.ObjectOutput;

import java.io.InvalidObjectException;

import java.io.ObjectInputStream;

import java.io.Serializable;

import java.time.format.DateTimeFormatter;

import java.time.format.DateTimeParseException;

import java.time.temporal.ChronoField;

import java.time.temporal.ChronoUnit;

import java.time.temporal.Temporal;

import java.time.temporal.TemporalAccessor;

import java.time.temporal.TemporalAdjuster;

import java.time.temporal.TemporalAmount;

import java.time.temporal.TemporalField;

import java.time.temporal.TemporalQueries;

import java.time.temporal.TemporalQuery;

import java.time.temporal.TemporalUnit;

import java.time.temporal.UnsupportedTemporalTypeException;

import java.time.temporal.ValueRange;

import java.time.zone.ZoneRules;

import java.util.Objects;

/**

 * A time with an offset from UTC/Greenwich in the ISO-8601 calendar system,

 * such as {@code 10:15:30+01:00}.

 * <p>

 * {@code OffsetTime} is an immutable date-time object that represents a time, often

 * viewed as hour-minute-second-offset.

 * This class stores all time fields, to a precision of nanoseconds,

 * as well as a zone offset.

 * For example, the value "13:45.30.123456789+02:00" can be stored

 * in an {@code OffsetTime}.

 *

 * <p>

 * This is a <a href="{@docRoot}/java/lang/doc-files/ValueBased.html">value-based</a>

 * class; use of identity-sensitive operations (including reference equality

 * ({@code ==}), identity hash code, or synchronization) on instances of

 * {@code OffsetTime} may have unpredictable results and should be avoided.

 * The {@code equals} method should be used for comparisons.

 *

 * @implSpec

 * This class is immutable and thread-safe.

 *

 * @since 1.8

 */

public final class OffsetTime

        implements Temporal, TemporalAdjuster, Comparable<OffsetTime>, Serializable {

    /**

     * The minimum supported {@code OffsetTime}, '00:00:00+18:00'.

     * This is the time of midnight at the start of the day in the maximum offset

     * (larger offsets are earlier on the time-line).

     * This combines {@link LocalTime#MIN} and {@link ZoneOffset#MAX}.

     * This could be used by an application as a "far past" date.

     */

    public static final OffsetTime MIN = LocalTime.MIN.atOffset(ZoneOffset.MAX);

    /**

     * The maximum supported {@code OffsetTime}, '23:59:59.999999999-18:00'.

     * This is the time just before midnight at the end of the day in the minimum offset

     * (larger negative offsets are later on the time-line).

     * This combines {@link LocalTime#MAX} and {@link ZoneOffset#MIN}.

     * This could be used by an application as a "far future" date.

     */

    public static final OffsetTime MAX = LocalTime.MAX.atOffset(ZoneOffset.MIN);

    /**

     * Serialization version.

     */

    private static final long serialVersionUID = 7264499704384272492L;

    /**

     * The local date-time.

     */

    private final LocalTime time;

    /**

     * The offset from UTC/Greenwich.

     */

    private final ZoneOffset offset;

    //-----------------------------------------------------------------------

    /**

     * Obtains the current time from the system clock in the default time-zone.

     * <p>

     * This will query the {@link Clock#systemDefaultZone() system clock} in the default

     * time-zone to obtain the current time.

     * The offset will be calculated from the time-zone in the clock.

     * <p>

     * Using this method will prevent the ability to use an alternate clock for testing

     * because the clock is hard-coded.

     *

     * @return the current time using the system clock and default time-zone, not null

     */

    public static OffsetTime now() {

        return now(Clock.systemDefaultZone());

    }

    /**

     * Obtains the current time from the system clock in the specified time-zone.

     * <p>

     * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current time.

     * Specifying the time-zone avoids dependence on the default time-zone.

     * The offset will be calculated from the specified time-zone.

     * <p>

     * Using this method will prevent the ability to use an alternate clock for testing

     * because the clock is hard-coded.

     *

     * @param zone  the zone ID to use, not null

     * @return the current time using the system clock, not null

     */

    public static OffsetTime now(ZoneId zone) {

        return now(Clock.system(zone));

    }

    /**

     * Obtains the current time from the specified clock.

     * <p>

     * This will query the specified clock to obtain the current time.

     * The offset will be calculated from the time-zone in the clock.

     * <p>

     * Using this method allows the use of an alternate clock for testing.

     * The alternate clock may be introduced using {@link Clock dependency injection}.

     *

     * @param clock  the clock to use, not null

     * @return the current time, not null

     */

    public static OffsetTime now(Clock clock) {

        Objects.requireNonNull(clock, "clock");

        final Instant now = clock.instant();  // called once

        return ofInstant(now, clock.getZone().getRules().getOffset(now));

    }

    //-----------------------------------------------------------------------

    /**

     * Obtains an instance of {@code OffsetTime} from a local time and an offset.

     *

     * @param time  the local time, not null

     * @param offset  the zone offset, not null

     * @return the offset time, not null

     */

    public static OffsetTime of(LocalTime time, ZoneOffset offset) {

        return new OffsetTime(time, offset);

    }

    /**

     * Obtains an instance of {@code OffsetTime} from an hour, minute, second and nanosecond.

     * <p>

     * This creates an offset time with the four specified fields.

     * <p>

     * This method exists primarily for writing test cases.

     * Non test-code will typically use other methods to create an offset time.

     * {@code LocalTime} has two additional convenience variants of the

     * equivalent factory method taking fewer arguments.

     * They are not provided here to reduce the footprint of the API.

     *

     * @param hour  the hour-of-day to represent, from 0 to 23

     * @param minute  the minute-of-hour to represent, from 0 to 59

     * @param second  the second-of-minute to represent, from 0 to 59

     * @param nanoOfSecond  the nano-of-second to represent, from 0 to 999,999,999

     * @param offset  the zone offset, not null

     * @return the offset time, not null

     * @throws DateTimeException if the value of any field is out of range

     */

    public static OffsetTime of(int hour, int minute, int second, int nanoOfSecond, ZoneOffset offset) {

        return new OffsetTime(LocalTime.of(hour, minute, second, nanoOfSecond), offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Obtains an instance of {@code OffsetTime} from an {@code Instant} and zone ID.

     * <p>

     * This creates an offset time with the same instant as that specified.

     * Finding the offset from UTC/Greenwich is simple as there is only one valid

     * offset for each instant.

     * <p>

     * The date component of the instant is dropped during the conversion.

     * This means that the conversion can never fail due to the instant being

     * out of the valid range of dates.

     *

     * @param instant  the instant to create the time from, not null

     * @param zone  the time-zone, which may be an offset, not null

     * @return the offset time, not null

     */

    public static OffsetTime ofInstant(Instant instant, ZoneId zone) {

        Objects.requireNonNull(instant, "instant");

        Objects.requireNonNull(zone, "zone");

        ZoneRules rules = zone.getRules();

        ZoneOffset offset = rules.getOffset(instant);

        long localSecond = instant.getEpochSecond() + offset.getTotalSeconds();  // overflow caught later

        int secsOfDay = (int) Math.floorMod(localSecond, SECONDS_PER_DAY);

        LocalTime time = LocalTime.ofNanoOfDay(secsOfDay * NANOS_PER_SECOND + instant.getNano());

        return new OffsetTime(time, offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Obtains an instance of {@code OffsetTime} from a temporal object.

     * <p>

     * This obtains an offset time based on the specified temporal.

     * A {@code TemporalAccessor} represents an arbitrary set of date and time information,

     * which this factory converts to an instance of {@code OffsetTime}.

     * <p>

     * The conversion extracts and combines the {@code ZoneOffset} and the

     * {@code LocalTime} from the temporal object.

     * Implementations are permitted to perform optimizations such as accessing

     * those fields that are equivalent to the relevant objects.

     * <p>

     * This method matches the signature of the functional interface {@link TemporalQuery}

     * allowing it to be used as a query via method reference, {@code OffsetTime::from}.

     *

     * @param temporal  the temporal object to convert, not null

     * @return the offset time, not null

     * @throws DateTimeException if unable to convert to an {@code OffsetTime}

     */

    public static OffsetTime from(TemporalAccessor temporal) {

        if (temporal instanceof OffsetTime) {

            return (OffsetTime) temporal;

        }

        try {

            LocalTime time = LocalTime.from(temporal);

            ZoneOffset offset = ZoneOffset.from(temporal);

            return new OffsetTime(time, offset);

        } catch (DateTimeException ex) {

            throw new DateTimeException("Unable to obtain OffsetTime from TemporalAccessor: " +

                    temporal + " of type " + temporal.getClass().getName(), ex);

        }

    }

    //-----------------------------------------------------------------------

    /**

     * Obtains an instance of {@code OffsetTime} from a text string such as {@code 10:15:30+01:00}.

     * <p>

     * The string must represent a valid time and is parsed using

     * {@link java.time.format.DateTimeFormatter#ISO_OFFSET_TIME}.

     *

     * @param text  the text to parse such as "10:15:30+01:00", not null

     * @return the parsed local time, not null

     * @throws DateTimeParseException if the text cannot be parsed

     */

    public static OffsetTime parse(CharSequence text) {

        return parse(text, DateTimeFormatter.ISO_OFFSET_TIME);

    }

    /**

     * Obtains an instance of {@code OffsetTime} from a text string using a specific formatter.

     * <p>

     * The text is parsed using the formatter, returning a time.

     *

     * @param text  the text to parse, not null

     * @param formatter  the formatter to use, not null

     * @return the parsed offset time, not null

     * @throws DateTimeParseException if the text cannot be parsed

     */

    public static OffsetTime parse(CharSequence text, DateTimeFormatter formatter) {

        Objects.requireNonNull(formatter, "formatter");

        return formatter.parse(text, OffsetTime::from);

    }

    //-----------------------------------------------------------------------

    /**

     * Constructor.

     *

     * @param time  the local time, not null

     * @param offset  the zone offset, not null

     */

    private OffsetTime(LocalTime time, ZoneOffset offset) {

        this.time = Objects.requireNonNull(time, "time");

        this.offset = Objects.requireNonNull(offset, "offset");

    }

    /**

     * Returns a new time based on this one, returning {@code this} where possible.

     *

     * @param time  the time to create with, not null

     * @param offset  the zone offset to create with, not null

     */

    private OffsetTime with(LocalTime time, ZoneOffset offset) {

        if (this.time == time && this.offset.equals(offset)) {

            return this;

        }

        return new OffsetTime(time, offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Checks if the specified field is supported.

     * <p>

     * This checks if this time can be queried for the specified field.

     * If false, then calling the {@link #range(TemporalField) range},

     * {@link #get(TemporalField) get} and {@link #with(TemporalField, long)}

     * methods will throw an exception.

     * <p>

     * If the field is a {@link ChronoField} then the query is implemented here.

     * The supported fields are:

     * <ul>

     * <li>{@code NANO_OF_SECOND}

     * <li>{@code NANO_OF_DAY}

     * <li>{@code MICRO_OF_SECOND}

     * <li>{@code MICRO_OF_DAY}

     * <li>{@code MILLI_OF_SECOND}

     * <li>{@code MILLI_OF_DAY}

     * <li>{@code SECOND_OF_MINUTE}

     * <li>{@code SECOND_OF_DAY}

     * <li>{@code MINUTE_OF_HOUR}

     * <li>{@code MINUTE_OF_DAY}

     * <li>{@code HOUR_OF_AMPM}

     * <li>{@code CLOCK_HOUR_OF_AMPM}

     * <li>{@code HOUR_OF_DAY}

     * <li>{@code CLOCK_HOUR_OF_DAY}

     * <li>{@code AMPM_OF_DAY}

     * <li>{@code OFFSET_SECONDS}

     * </ul>

     * All other {@code ChronoField} instances will return false.

     * <p>

     * If the field is not a {@code ChronoField}, then the result of this method

     * is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)}

     * passing {@code this} as the argument.

     * Whether the field is supported is determined by the field.

     *

     * @param field  the field to check, null returns false

     * @return true if the field is supported on this time, false if not

     */

    @Override

    public boolean isSupported(TemporalField field) {

        if (field instanceof ChronoField) {

            return field.isTimeBased() || field == OFFSET_SECONDS;

        }

        return field != null && field.isSupportedBy(this);

    }

    /**

     * Checks if the specified unit is supported.

     * <p>

     * This checks if the specified unit can be added to, or subtracted from, this offset-time.

     * If false, then calling the {@link #plus(long, TemporalUnit)} and

     * {@link #minus(long, TemporalUnit) minus} methods will throw an exception.

     * <p>

     * If the unit is a {@link ChronoUnit} then the query is implemented here.

     * The supported units are:

     * <ul>

     * <li>{@code NANOS}

     * <li>{@code MICROS}

     * <li>{@code MILLIS}

     * <li>{@code SECONDS}

     * <li>{@code MINUTES}

     * <li>{@code HOURS}

     * <li>{@code HALF_DAYS}

     * </ul>

     * All other {@code ChronoUnit} instances will return false.

     * <p>

     * If the unit is not a {@code ChronoUnit}, then the result of this method

     * is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)}

     * passing {@code this} as the argument.

     * Whether the unit is supported is determined by the unit.

     *

     * @param unit  the unit to check, null returns false

     * @return true if the unit can be added/subtracted, false if not

     */

    @Override  // override for Javadoc

    public boolean isSupported(TemporalUnit unit) {

        if (unit instanceof ChronoUnit) {

            return unit.isTimeBased();

        }

        return unit != null && unit.isSupportedBy(this);

    }

    //-----------------------------------------------------------------------

    /**

     * Gets the range of valid values for the specified field.

     * <p>

     * The range object expresses the minimum and maximum valid values for a field.

     * This time is used to enhance the accuracy of the returned range.

     * If it is not possible to return the range, because the field is not supported

     * or for some other reason, an exception is thrown.

     * <p>

     * If the field is a {@link ChronoField} then the query is implemented here.

     * The {@link #isSupported(TemporalField) supported fields} will return

     * appropriate range instances.

     * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.

     * <p>

     * If the field is not a {@code ChronoField}, then the result of this method

     * is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}

     * passing {@code this} as the argument.

     * Whether the range can be obtained is determined by the field.

     *

     * @param field  the field to query the range for, not null

     * @return the range of valid values for the field, not null

     * @throws DateTimeException if the range for the field cannot be obtained

     * @throws UnsupportedTemporalTypeException if the field is not supported

     */

    @Override

    public ValueRange range(TemporalField field) {

        if (field instanceof ChronoField) {

            if (field == OFFSET_SECONDS) {

                return field.range();

            }

            return time.range(field);

        }

        return field.rangeRefinedBy(this);

    }

    /**

     * Gets the value of the specified field from this time as an {@code int}.

     * <p>

     * This queries this time for the value of the specified field.

     * The returned value will always be within the valid range of values for the field.

     * If it is not possible to return the value, because the field is not supported

     * or for some other reason, an exception is thrown.

     * <p>

     * If the field is a {@link ChronoField} then the query is implemented here.

     * The {@link #isSupported(TemporalField) supported fields} will return valid

     * values based on this time, except {@code NANO_OF_DAY} and {@code MICRO_OF_DAY}

     * which are too large to fit in an {@code int} and throw a {@code DateTimeException}.

     * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.

     * <p>

     * If the field is not a {@code ChronoField}, then the result of this method

     * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}

     * passing {@code this} as the argument. Whether the value can be obtained,

     * and what the value represents, is determined by the field.

     *

     * @param field  the field to get, not null

     * @return the value for the field

     * @throws DateTimeException if a value for the field cannot be obtained or

     *         the value is outside the range of valid values for the field

     * @throws UnsupportedTemporalTypeException if the field is not supported or

     *         the range of values exceeds an {@code int}

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override  // override for Javadoc

    public int get(TemporalField field) {

        return Temporal.super.get(field);

    }

    /**

     * Gets the value of the specified field from this time as a {@code long}.

     * <p>

     * This queries this time for the value of the specified field.

     * If it is not possible to return the value, because the field is not supported

     * or for some other reason, an exception is thrown.

     * <p>

     * If the field is a {@link ChronoField} then the query is implemented here.

     * The {@link #isSupported(TemporalField) supported fields} will return valid

     * values based on this time.

     * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.

     * <p>

     * If the field is not a {@code ChronoField}, then the result of this method

     * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}

     * passing {@code this} as the argument. Whether the value can be obtained,

     * and what the value represents, is determined by the field.

     *

     * @param field  the field to get, not null

     * @return the value for the field

     * @throws DateTimeException if a value for the field cannot be obtained

     * @throws UnsupportedTemporalTypeException if the field is not supported

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public long getLong(TemporalField field) {

        if (field instanceof ChronoField) {

            if (field == OFFSET_SECONDS) {

                return offset.getTotalSeconds();

            }

            return time.getLong(field);

        }

        return field.getFrom(this);

    }

    //-----------------------------------------------------------------------

    /**

     * Gets the zone offset, such as '+01:00'.

     * <p>

     * This is the offset of the local time from UTC/Greenwich.

     *

     * @return the zone offset, not null

     */

    public ZoneOffset getOffset() {

        return offset;

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified offset ensuring

     * that the result has the same local time.

     * <p>

     * This method returns an object with the same {@code LocalTime} and the specified {@code ZoneOffset}.

     * No calculation is needed or performed.

     * For example, if this time represents {@code 10:30+02:00} and the offset specified is

     * {@code +03:00}, then this method will return {@code 10:30+03:00}.

     * <p>

     * To take into account the difference between the offsets, and adjust the time fields,

     * use {@link #withOffsetSameInstant}.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param offset  the zone offset to change to, not null

     * @return an {@code OffsetTime} based on this time with the requested offset, not null

     */

    public OffsetTime withOffsetSameLocal(ZoneOffset offset) {

        return offset != null && offset.equals(this.offset) ? this : new OffsetTime(time, offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified offset ensuring

     * that the result is at the same instant on an implied day.

     * <p>

     * This method returns an object with the specified {@code ZoneOffset} and a {@code LocalTime}

     * adjusted by the difference between the two offsets.

     * This will result in the old and new objects representing the same instant on an implied day.

     * This is useful for finding the local time in a different offset.

     * For example, if this time represents {@code 10:30+02:00} and the offset specified is

     * {@code +03:00}, then this method will return {@code 11:30+03:00}.

     * <p>

     * To change the offset without adjusting the local time use {@link #withOffsetSameLocal}.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param offset  the zone offset to change to, not null

     * @return an {@code OffsetTime} based on this time with the requested offset, not null

     */

    public OffsetTime withOffsetSameInstant(ZoneOffset offset) {

        if (offset.equals(this.offset)) {

            return this;

        }

        int difference = offset.getTotalSeconds() - this.offset.getTotalSeconds();

        LocalTime adjusted = time.plusSeconds(difference);

        return new OffsetTime(adjusted, offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Gets the {@code LocalTime} part of this date-time.

     * <p>

     * This returns a {@code LocalTime} with the same hour, minute, second and

     * nanosecond as this date-time.

     *

     * @return the time part of this date-time, not null

     */

    public LocalTime toLocalTime() {

        return time;

    }

    //-----------------------------------------------------------------------

    /**

     * Gets the hour-of-day field.

     *

     * @return the hour-of-day, from 0 to 23

     */

    public int getHour() {

        return time.getHour();

    }

    /**

     * Gets the minute-of-hour field.

     *

     * @return the minute-of-hour, from 0 to 59

     */

    public int getMinute() {

        return time.getMinute();

    }

    /**

     * Gets the second-of-minute field.

     *

     * @return the second-of-minute, from 0 to 59

     */

    public int getSecond() {

        return time.getSecond();

    }

    /**

     * Gets the nano-of-second field.

     *

     * @return the nano-of-second, from 0 to 999,999,999

     */

    public int getNano() {

        return time.getNano();

    }

    //-----------------------------------------------------------------------

    /**

     * Returns an adjusted copy of this time.

     * <p>

     * This returns an {@code OffsetTime}, based on this one, with the time adjusted.

     * The adjustment takes place using the specified adjuster strategy object.

     * Read the documentation of the adjuster to understand what adjustment will be made.

     * <p>

     * A simple adjuster might simply set the one of the fields, such as the hour field.

     * A more complex adjuster might set the time to the last hour of the day.

     * <p>

     * The classes {@link LocalTime} and {@link ZoneOffset} implement {@code TemporalAdjuster},

     * thus this method can be used to change the time or offset:

     * <pre>

     *  result = offsetTime.with(time);

     *  result = offsetTime.with(offset);

     * </pre>

     * <p>

     * The result of this method is obtained by invoking the

     * {@link TemporalAdjuster#adjustInto(Temporal)} method on the

     * specified adjuster passing {@code this} as the argument.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param adjuster the adjuster to use, not null

     * @return an {@code OffsetTime} based on {@code this} with the adjustment made, not null

     * @throws DateTimeException if the adjustment cannot be made

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public OffsetTime with(TemporalAdjuster adjuster) {

        // optimizations

        if (adjuster instanceof LocalTime) {

            return with((LocalTime) adjuster, offset);

        } else if (adjuster instanceof ZoneOffset) {

            return with(time, (ZoneOffset) adjuster);

        } else if (adjuster instanceof OffsetTime) {

            return (OffsetTime) adjuster;

        }

        return (OffsetTime) adjuster.adjustInto(this);

    }

    /**

     * Returns a copy of this time with the specified field set to a new value.

     * <p>

     * This returns an {@code OffsetTime}, based on this one, with the value

     * for the specified field changed.

     * This can be used to change any supported field, such as the hour, minute or second.

     * If it is not possible to set the value, because the field is not supported or for

     * some other reason, an exception is thrown.

     * <p>

     * If the field is a {@link ChronoField} then the adjustment is implemented here.

     * <p>

     * The {@code OFFSET_SECONDS} field will return a time with the specified offset.

     * The local time is unaltered. If the new offset value is outside the valid range

     * then a {@code DateTimeException} will be thrown.

     * <p>

     * The other {@link #isSupported(TemporalField) supported fields} will behave as per

     * the matching method on {@link LocalTime#with(TemporalField, long)} LocalTime}.

     * In this case, the offset is not part of the calculation and will be unchanged.

     * <p>

     * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.

     * <p>

     * If the field is not a {@code ChronoField}, then the result of this method

     * is obtained by invoking {@code TemporalField.adjustInto(Temporal, long)}

     * passing {@code this} as the argument. In this case, the field determines

     * whether and how to adjust the instant.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param field  the field to set in the result, not null

     * @param newValue  the new value of the field in the result

     * @return an {@code OffsetTime} based on {@code this} with the specified field set, not null

     * @throws DateTimeException if the field cannot be set

     * @throws UnsupportedTemporalTypeException if the field is not supported

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public OffsetTime with(TemporalField field, long newValue) {

        if (field instanceof ChronoField) {

            if (field == OFFSET_SECONDS) {

                ChronoField f = (ChronoField) field;

                return with(time, ZoneOffset.ofTotalSeconds(f.checkValidIntValue(newValue)));

            }

            return with(time.with(field, newValue), offset);

        }

        return field.adjustInto(this, newValue);

    }

    //-----------------------------------------------------------------------

    /**

     * Returns a copy of this {@code OffsetTime} with the hour-of-day altered.

     * <p>

     * The offset does not affect the calculation and will be the same in the result.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param hour  the hour-of-day to set in the result, from 0 to 23

     * @return an {@code OffsetTime} based on this time with the requested hour, not null

     * @throws DateTimeException if the hour value is invalid

     */

    public OffsetTime withHour(int hour) {

        return with(time.withHour(hour), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the minute-of-hour altered.

     * <p>

     * The offset does not affect the calculation and will be the same in the result.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param minute  the minute-of-hour to set in the result, from 0 to 59

     * @return an {@code OffsetTime} based on this time with the requested minute, not null

     * @throws DateTimeException if the minute value is invalid

     */

    public OffsetTime withMinute(int minute) {

        return with(time.withMinute(minute), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the second-of-minute altered.

     * <p>

     * The offset does not affect the calculation and will be the same in the result.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param second  the second-of-minute to set in the result, from 0 to 59

     * @return an {@code OffsetTime} based on this time with the requested second, not null

     * @throws DateTimeException if the second value is invalid

     */

    public OffsetTime withSecond(int second) {

        return with(time.withSecond(second), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the nano-of-second altered.

     * <p>

     * The offset does not affect the calculation and will be the same in the result.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param nanoOfSecond  the nano-of-second to set in the result, from 0 to 999,999,999

     * @return an {@code OffsetTime} based on this time with the requested nanosecond, not null

     * @throws DateTimeException if the nanos value is invalid

     */

    public OffsetTime withNano(int nanoOfSecond) {

        return with(time.withNano(nanoOfSecond), offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Returns a copy of this {@code OffsetTime} with the time truncated.

     * <p>

     * Truncation returns a copy of the original time with fields

     * smaller than the specified unit set to zero.

     * For example, truncating with the {@link ChronoUnit#MINUTES minutes} unit

     * will set the second-of-minute and nano-of-second field to zero.

     * <p>

     * The unit must have a {@linkplain TemporalUnit#getDuration() duration}

     * that divides into the length of a standard day without remainder.

     * This includes all supplied time units on {@link ChronoUnit} and

     * {@link ChronoUnit#DAYS DAYS}. Other units throw an exception.

     * <p>

     * The offset does not affect the calculation and will be the same in the result.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param unit  the unit to truncate to, not null

     * @return an {@code OffsetTime} based on this time with the time truncated, not null

     * @throws DateTimeException if unable to truncate

     * @throws UnsupportedTemporalTypeException if the unit is not supported

     */

    public OffsetTime truncatedTo(TemporalUnit unit) {

        return with(time.truncatedTo(unit), offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Returns a copy of this time with the specified amount added.

     * <p>

     * This returns an {@code OffsetTime}, based on this one, with the specified amount added.

     * The amount is typically {@link Duration} but may be any other type implementing

     * the {@link TemporalAmount} interface.

     * <p>

     * The calculation is delegated to the amount object by calling

     * {@link TemporalAmount#addTo(Temporal)}. The amount implementation is free

     * to implement the addition in any way it wishes, however it typically

     * calls back to {@link #plus(long, TemporalUnit)}. Consult the documentation

     * of the amount implementation to determine if it can be successfully added.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param amountToAdd  the amount to add, not null

     * @return an {@code OffsetTime} based on this time with the addition made, not null

     * @throws DateTimeException if the addition cannot be made

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public OffsetTime plus(TemporalAmount amountToAdd) {

        return (OffsetTime) amountToAdd.addTo(this);

    }

    /**

     * Returns a copy of this time with the specified amount added.

     * <p>

     * This returns an {@code OffsetTime}, based on this one, with the amount

     * in terms of the unit added. If it is not possible to add the amount, because the

     * unit is not supported or for some other reason, an exception is thrown.

     * <p>

     * If the field is a {@link ChronoUnit} then the addition is implemented by

     * {@link LocalTime#plus(long, TemporalUnit)}.

     * The offset is not part of the calculation and will be unchanged in the result.

     * <p>

     * If the field is not a {@code ChronoUnit}, then the result of this method

     * is obtained by invoking {@code TemporalUnit.addTo(Temporal, long)}

     * passing {@code this} as the argument. In this case, the unit determines

     * whether and how to perform the addition.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param amountToAdd  the amount of the unit to add to the result, may be negative

     * @param unit  the unit of the amount to add, not null

     * @return an {@code OffsetTime} based on this time with the specified amount added, not null

     * @throws DateTimeException if the addition cannot be made

     * @throws UnsupportedTemporalTypeException if the unit is not supported

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public OffsetTime plus(long amountToAdd, TemporalUnit unit) {

        if (unit instanceof ChronoUnit) {

            return with(time.plus(amountToAdd, unit), offset);

        }

        return unit.addTo(this, amountToAdd);

    }

    //-----------------------------------------------------------------------

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of hours added.

     * <p>

     * This adds the specified number of hours to this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param hours  the hours to add, may be negative

     * @return an {@code OffsetTime} based on this time with the hours added, not null

     */

    public OffsetTime plusHours(long hours) {

        return with(time.plusHours(hours), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of minutes added.

     * <p>

     * This adds the specified number of minutes to this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param minutes  the minutes to add, may be negative

     * @return an {@code OffsetTime} based on this time with the minutes added, not null

     */

    public OffsetTime plusMinutes(long minutes) {

        return with(time.plusMinutes(minutes), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of seconds added.

     * <p>

     * This adds the specified number of seconds to this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param seconds  the seconds to add, may be negative

     * @return an {@code OffsetTime} based on this time with the seconds added, not null

     */

    public OffsetTime plusSeconds(long seconds) {

        return with(time.plusSeconds(seconds), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of nanoseconds added.

     * <p>

     * This adds the specified number of nanoseconds to this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param nanos  the nanos to add, may be negative

     * @return an {@code OffsetTime} based on this time with the nanoseconds added, not null

     */

    public OffsetTime plusNanos(long nanos) {

        return with(time.plusNanos(nanos), offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Returns a copy of this time with the specified amount subtracted.

     * <p>

     * This returns an {@code OffsetTime}, based on this one, with the specified amount subtracted.

     * The amount is typically {@link Duration} but may be any other type implementing

     * the {@link TemporalAmount} interface.

     * <p>

     * The calculation is delegated to the amount object by calling

     * {@link TemporalAmount#subtractFrom(Temporal)}. The amount implementation is free

     * to implement the subtraction in any way it wishes, however it typically

     * calls back to {@link #minus(long, TemporalUnit)}. Consult the documentation

     * of the amount implementation to determine if it can be successfully subtracted.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param amountToSubtract  the amount to subtract, not null

     * @return an {@code OffsetTime} based on this time with the subtraction made, not null

     * @throws DateTimeException if the subtraction cannot be made

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public OffsetTime minus(TemporalAmount amountToSubtract) {

        return (OffsetTime) amountToSubtract.subtractFrom(this);

    }

    /**

     * Returns a copy of this time with the specified amount subtracted.

     * <p>

     * This returns an {@code OffsetTime}, based on this one, with the amount

     * in terms of the unit subtracted. If it is not possible to subtract the amount,

     * because the unit is not supported or for some other reason, an exception is thrown.

     * <p>

     * This method is equivalent to {@link #plus(long, TemporalUnit)} with the amount negated.

     * See that method for a full description of how addition, and thus subtraction, works.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param amountToSubtract  the amount of the unit to subtract from the result, may be negative

     * @param unit  the unit of the amount to subtract, not null

     * @return an {@code OffsetTime} based on this time with the specified amount subtracted, not null

     * @throws DateTimeException if the subtraction cannot be made

     * @throws UnsupportedTemporalTypeException if the unit is not supported

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public OffsetTime minus(long amountToSubtract, TemporalUnit unit) {

        return (amountToSubtract == Long.MIN_VALUE ? plus(Long.MAX_VALUE, unit).plus(1, unit) : plus(-amountToSubtract, unit));

    }

    //-----------------------------------------------------------------------

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of hours subtracted.

     * <p>

     * This subtracts the specified number of hours from this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param hours  the hours to subtract, may be negative

     * @return an {@code OffsetTime} based on this time with the hours subtracted, not null

     */

    public OffsetTime minusHours(long hours) {

        return with(time.minusHours(hours), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of minutes subtracted.

     * <p>

     * This subtracts the specified number of minutes from this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param minutes  the minutes to subtract, may be negative

     * @return an {@code OffsetTime} based on this time with the minutes subtracted, not null

     */

    public OffsetTime minusMinutes(long minutes) {

        return with(time.minusMinutes(minutes), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of seconds subtracted.

     * <p>

     * This subtracts the specified number of seconds from this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param seconds  the seconds to subtract, may be negative

     * @return an {@code OffsetTime} based on this time with the seconds subtracted, not null

     */

    public OffsetTime minusSeconds(long seconds) {

        return with(time.minusSeconds(seconds), offset);

    }

    /**

     * Returns a copy of this {@code OffsetTime} with the specified number of nanoseconds subtracted.

     * <p>

     * This subtracts the specified number of nanoseconds from this time, returning a new time.

     * The calculation wraps around midnight.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param nanos  the nanos to subtract, may be negative

     * @return an {@code OffsetTime} based on this time with the nanoseconds subtracted, not null

     */

    public OffsetTime minusNanos(long nanos) {

        return with(time.minusNanos(nanos), offset);

    }

    //-----------------------------------------------------------------------

    /**

     * Queries this time using the specified query.

     * <p>

     * This queries this time using the specified query strategy object.

     * The {@code TemporalQuery} object defines the logic to be used to

     * obtain the result. Read the documentation of the query to understand

     * what the result of this method will be.

     * <p>

     * The result of this method is obtained by invoking the

     * {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the

     * specified query passing {@code this} as the argument.

     *

     * @param <R> the type of the result

     * @param query  the query to invoke, not null

     * @return the query result, null may be returned (defined by the query)

     * @throws DateTimeException if unable to query (defined by the query)

     * @throws ArithmeticException if numeric overflow occurs (defined by the query)

     */

    @SuppressWarnings("unchecked")

    @Override

    public <R> R query(TemporalQuery<R> query) {

        if (query == TemporalQueries.offset() || query == TemporalQueries.zone()) {

            return (R) offset;

        } else if (query == TemporalQueries.zoneId() | query == TemporalQueries.chronology() || query == TemporalQueries.localDate()) {

            return null;

        } else if (query == TemporalQueries.localTime()) {

            return (R) time;

        } else if (query == TemporalQueries.precision()) {

            return (R) NANOS;

        }

        // inline TemporalAccessor.super.query(query) as an optimization

        // non-JDK classes are not permitted to make this optimization

        return query.queryFrom(this);

    }

    /**

     * Adjusts the specified temporal object to have the same offset and time

     * as this object.

     * <p>

     * This returns a temporal object of the same observable type as the input

     * with the offset and time changed to be the same as this.

     * <p>

     * The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)}

     * twice, passing {@link ChronoField#NANO_OF_DAY} and

     * {@link ChronoField#OFFSET_SECONDS} as the fields.

     * <p>

     * In most cases, it is clearer to reverse the calling pattern by using

     * {@link Temporal#with(TemporalAdjuster)}:

     * <pre>

     *   // these two lines are equivalent, but the second approach is recommended

     *   temporal = thisOffsetTime.adjustInto(temporal);

     *   temporal = temporal.with(thisOffsetTime);

     * </pre>

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param temporal  the target object to be adjusted, not null

     * @return the adjusted object, not null

     * @throws DateTimeException if unable to make the adjustment

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public Temporal adjustInto(Temporal temporal) {

        return temporal

                .with(NANO_OF_DAY, time.toNanoOfDay())

                .with(OFFSET_SECONDS, offset.getTotalSeconds());

    }

    /**

     * Calculates the amount of time until another time in terms of the specified unit.

     * <p>

     * This calculates the amount of time between two {@code OffsetTime}

     * objects in terms of a single {@code TemporalUnit}.

     * The start and end points are {@code this} and the specified time.

     * The result will be negative if the end is before the start.

     * For example, the amount in hours between two times can be calculated

     * using {@code startTime.until(endTime, HOURS)}.

     * <p>

     * The {@code Temporal} passed to this method is converted to a

     * {@code OffsetTime} using {@link #from(TemporalAccessor)}.

     * If the offset differs between the two times, then the specified

     * end time is normalized to have the same offset as this time.

     * <p>

     * The calculation returns a whole number, representing the number of

     * complete units between the two times.

     * For example, the amount in hours between 11:30Z and 13:29Z will only

     * be one hour as it is one minute short of two hours.

     * <p>

     * There are two equivalent ways of using this method.

     * The first is to invoke this method.

     * The second is to use {@link TemporalUnit#between(Temporal, Temporal)}:

     * <pre>

     *   // these two lines are equivalent

     *   amount = start.until(end, MINUTES);

     *   amount = MINUTES.between(start, end);

     * </pre>

     * The choice should be made based on which makes the code more readable.

     * <p>

     * The calculation is implemented in this method for {@link ChronoUnit}.

     * The units {@code NANOS}, {@code MICROS}, {@code MILLIS}, {@code SECONDS},

     * {@code MINUTES}, {@code HOURS} and {@code HALF_DAYS} are supported.

     * Other {@code ChronoUnit} values will throw an exception.

     * <p>

     * If the unit is not a {@code ChronoUnit}, then the result of this method

     * is obtained by invoking {@code TemporalUnit.between(Temporal, Temporal)}

     * passing {@code this} as the first argument and the converted input temporal

     * as the second argument.

     * <p>

     * This instance is immutable and unaffected by this method call.

     *

     * @param endExclusive  the end time, exclusive, which is converted to an {@code OffsetTime}, not null

     * @param unit  the unit to measure the amount in, not null

     * @return the amount of time between this time and the end time

     * @throws DateTimeException if the amount cannot be calculated, or the end

     *  temporal cannot be converted to an {@code OffsetTime}

     * @throws UnsupportedTemporalTypeException if the unit is not supported

     * @throws ArithmeticException if numeric overflow occurs

     */

    @Override

    public long until(Temporal endExclusive, TemporalUnit unit) {

        OffsetTime end = OffsetTime.from(endExclusive);

        if (unit instanceof ChronoUnit) {

            long nanosUntil = end.toEpochNano() - toEpochNano();  // no overflow

            switch ((ChronoUnit) unit) {

                case NANOS: return nanosUntil;

                case MICROS: return nanosUntil / 1000;

                case MILLIS: return nanosUntil / 1000_000;

                case SECONDS: return nanosUntil / NANOS_PER_SECOND;

                case MINUTES: return nanosUntil / NANOS_PER_MINUTE;

                case HOURS: return nanosUntil / NANOS_PER_HOUR;

                case HALF_DAYS: return nanosUntil / (12 * NANOS_PER_HOUR);

            }

            throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);

        }

        return unit.between(this, end);

    }

    /**

     * Formats this time using the specified formatter.

     * <p>

     * This time will be passed to the formatter to produce a string.

     *

     * @param formatter  the formatter to use, not null

     * @return the formatted time string, not null

     * @throws DateTimeException if an error occurs during printing

     */

    public String format(DateTimeFormatter formatter) {

        Objects.requireNonNull(formatter, "formatter");

        return formatter.format(this);

    }

    //-----------------------------------------------------------------------

    /**

     * Combines this time with a date to create an {@code OffsetDateTime}.

     * <p>