/**
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* @copyright (c) 2016, Philipp Thürwächter & Pattrick Hüper
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* @copyright (c) 2007-present, Stephen Colebourne & Michael Nascimento Santos
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* @license BSD-3-Clause (see LICENSE in the root directory of this source tree)
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*/
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import { MathUtil } from '../MathUtil';
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import { Duration } from '../Duration';
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import { YearConstants } from '../YearConstants';
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import { TemporalUnit } from './TemporalUnit';
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/**
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* A standard set of date periods units.
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*
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* This set of units provide unit-based access to manipulate a date, time or date-time.
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* The standard set of units can be extended by implementing {@link TemporalUnit}.
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*
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* These units are intended to be applicable in multiple calendar systems.
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* For example, most non-ISO calendar systems define units of years, months and days,
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* just with slightly different rules.
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* The documentation of each unit explains how it operates.
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*
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* ### Static properties:
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*
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* - `ChronoUnit.CENTURIES`: Unit that represents the concept of a century. For the ISO calendar
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* system, it is equal to 100 years.
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*
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* - `ChronoUnit.DAYS`: Unit that represents the concept of a day. For the ISO calendar system, it
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* is the standard day from midnight to midnight. The estimated duration of a day is 24 Hours.
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*
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* - `ChronoUnit.DECADES`: Unit that represents the concept of a decade. For the ISO calendar system,
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* it is equal to 10 years.
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*
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* - `ChronoUnit.ERAS`: Unit that represents the concept of an era. The ISO calendar system doesn't
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* have eras thus it is impossible to add an era to a date or date-time. The estimated duration of the
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* era is artificially defined as 1,000,000,000 Years.
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*
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* - `ChronoUnit.FOREVER`: Artificial unit that represents the concept of forever. This is primarily
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* used with {@link TemporalField} to represent unbounded fields such as the year or era. The
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* estimated duration of the era is artificially defined as the largest duration supported by
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* {@link Duration}.
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*
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* - `ChronoUnit.HALF_DAYS`: Unit that represents the concept of half a day, as used in AM/PM. For
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* the ISO calendar system, it is equal to 12 hours.
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*
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* - `ChronoUnit.HOURS`: Unit that represents the concept of an hour. For the ISO calendar system,
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* it is equal to 60 minutes.
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*
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* - `ChronoUnit.MICROS`: Unit that represents the concept of a microsecond. For the ISO calendar
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* system, it is equal to the 1,000,000th part of the second unit.
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*
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* - `ChronoUnit.MILLENNIA`: Unit that represents the concept of a millennium. For the ISO calendar
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* system, it is equal to 1,000 years.
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*
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* - `ChronoUnit.MILLIS`: Unit that represents the concept of a millisecond. For the ISO calendar
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* system, it is equal to the 1000th part of the second unit.
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*
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* - `ChronoUnit.MINUTES`: Unit that represents the concept of a minute. For the ISO calendar system,
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* it is equal to 60 seconds.
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*
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* - `ChronoUnit.MONTHS`: Unit that represents the concept of a month. For the ISO calendar system,
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* the length of the month varies by month-of-year. The estimated duration of a month is one twelfth
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* of 365.2425 Days.
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*
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* - `ChronoUnit.NANOS`: Unit that represents the concept of a nanosecond, the smallest supported unit
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* of time. For the ISO calendar system, it is equal to the 1,000,000,000th part of the second unit.
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*
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* - `ChronoUnit.SECONDS`: Unit that represents the concept of a second. For the ISO calendar system,
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* it is equal to the second in the SI system of units, except around a leap-second.
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*
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* - `ChronoUnit.WEEKS`: Unit that represents the concept of a week. For the ISO calendar system,
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* it is equal to 7 Days.
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*
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* - `ChronoUnit.YEARS`: Unit that represents the concept of a year. For the ISO calendar system, it
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* is equal to 12 months. The estimated duration of a year is 365.2425 Days.
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*/
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export class ChronoUnit extends TemporalUnit {
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/**
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*
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* @param {String} name
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* @param {Duration} estimatedDuration
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* @private
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*/
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constructor (name, estimatedDuration) {
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super();
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this._name = name;
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this._duration = estimatedDuration;
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}
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//-----------------------------------------------------------------------
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/**
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* @return {Duration} the duration of this unit, which may be an estimate.
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*/
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duration() {
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return this._duration;
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}
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/**
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* @return {boolean} `true` if the duration is estimated, `false` if accurate.
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*/
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isDurationEstimated() {
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return this.isDateBased() || this === ChronoUnit.FOREVER;
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}
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//-----------------------------------------------------------------------
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/**
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* @return {boolean} `true` if date unit, `false` if a time unit.
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*/
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isDateBased() {
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return this.compareTo(ChronoUnit.DAYS) >= 0 && this !== ChronoUnit.FOREVER;
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}
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/**
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* Checks if this unit is a time unit.
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*
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* @return {boolean} `true` if time unit, `false` if a date unit.
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*/
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isTimeBased() {
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return this.compareTo(ChronoUnit.DAYS) < 0;
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}
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//-----------------------------------------------------------------------
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/**
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* @param {!Temporal} temporal the temporal object to check.
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* @return {boolean} `true` if the unit is supported.
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*/
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isSupportedBy(temporal) {
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if (this === ChronoUnit.FOREVER) {
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return false;
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}
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/* TODO: classes not implemented yet */
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/*
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if (temporal instanceof ChronoLocalDate) {
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return isDateBased();
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}
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if (temporal instanceof ChronoLocalDateTime || temporal instanceof ChronoZonedDateTime) {
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return true;
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}
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*/
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try {
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temporal.plus(1, this);
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return true;
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} catch (e) {
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try {
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temporal.plus(-1, this);
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return true;
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} catch (e2) {
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return false;
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}
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}
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}
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/**
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* @param {!Temporal} temporal the temporal object to adjust.
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* @param {number} amount the period of this unit to add, positive or negative.
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* @return {Temporal} the adjusted temporal object.
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* @throws DateTimeException if the period cannot be added.
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*/
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addTo(temporal, amount) {
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return temporal.plus(amount, this);
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}
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//-----------------------------------------------------------------------
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/**
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* @param {!Temporal} temporal1 the base temporal object.
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* @param {!Temporal} temporal2 the other temporal object.
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* @return {number} the period between temporal1 and temporal2 in terms of this unit;
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* positive if temporal2 is later than temporal1, negative if earlier.
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* @throws DateTimeException if the period cannot be calculated.
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* @throws ArithmeticException if numeric overflow occurs.
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*/
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between(temporal1, temporal2) {
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return temporal1.until(temporal2, this);
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}
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//-----------------------------------------------------------------------
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toString() {
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return this._name;
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}
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/**
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* Compares this ChronoUnit to the specified {@link TemporalUnit}.
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*
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* The comparison is based on the total length of the durations.
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*
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* @param {!TemporalUnit} other the other unit to compare to.
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* @return the comparator value, negative if less, positive if greater.
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*/
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compareTo(other) {
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return this.duration().compareTo(other.duration());
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}
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}
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export function _init() {
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/**
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* Unit that represents the concept of a nanosecond, the smallest supported unit of time.
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* For the ISO calendar system, it is equal to the 1,000,000,000th part of the second unit.
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*/
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ChronoUnit.NANOS = new ChronoUnit('Nanos', Duration.ofNanos(1));
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/**
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* Unit that represents the concept of a microsecond.
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* For the ISO calendar system, it is equal to the 1,000,000th part of the second unit.
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*/
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ChronoUnit.MICROS = new ChronoUnit('Micros', Duration.ofNanos(1000));
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/**
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* Unit that represents the concept of a millisecond.
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* For the ISO calendar system, it is equal to the 1000th part of the second unit.
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*/
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ChronoUnit.MILLIS = new ChronoUnit('Millis', Duration.ofNanos(1000000));
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/**
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* Unit that represents the concept of a second.
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* For the ISO calendar system, it is equal to the second in the SI system
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* of units, except around a leap-second.
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*/
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ChronoUnit.SECONDS = new ChronoUnit('Seconds', Duration.ofSeconds(1));
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/**
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* Unit that represents the concept of a minute.
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* For the ISO calendar system, it is equal to 60 seconds.
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*/
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ChronoUnit.MINUTES = new ChronoUnit('Minutes', Duration.ofSeconds(60));
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/**
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* Unit that represents the concept of an hour.
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* For the ISO calendar system, it is equal to 60 minutes.
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*/
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ChronoUnit.HOURS = new ChronoUnit('Hours', Duration.ofSeconds(3600));
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/**
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* Unit that represents the concept of half a day, as used in AM/PM.
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* For the ISO calendar system, it is equal to 12 hours.
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*/
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ChronoUnit.HALF_DAYS = new ChronoUnit('HalfDays', Duration.ofSeconds(43200));
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/**
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* Unit that represents the concept of a day.
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* For the ISO calendar system, it is the standard day from midnight to midnight.
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* The estimated duration of a day is 24 hours.
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*
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* When used with other calendar systems it must correspond to the day defined by
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* the rising and setting of the Sun on Earth. It is not required that days begin
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* at midnight - when converting between calendar systems, the date should be
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* equivalent at midday.
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*/
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ChronoUnit.DAYS = new ChronoUnit('Days', Duration.ofSeconds(86400));
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/**
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* Unit that represents the concept of a week.
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* For the ISO calendar system, it is equal to 7 days.
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*
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* When used with other calendar systems it must correspond to an integral number of days.
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*/
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ChronoUnit.WEEKS = new ChronoUnit('Weeks', Duration.ofSeconds(7 * 86400));
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/**
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* Unit that represents the concept of a month.
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* For the ISO calendar system, the length of the month varies by month-of-year.
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* The estimated duration of a month is one twelfth of 365.2425 days.
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*
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* When used with other calendar systems it must correspond to an integral number of days.
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*/
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ChronoUnit.MONTHS = new ChronoUnit('Months', Duration.ofSeconds(31556952 / 12));
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/**
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* Unit that represents the concept of a year.
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* For the ISO calendar system, it is equal to 12 months.
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* The estimated duration of a year is 365.2425 days.
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*
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* When used with other calendar systems it must correspond to an integral number of days
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* or months roughly equal to a year defined by the passage of the Earth around the Sun.
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*/
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ChronoUnit.YEARS = new ChronoUnit('Years', Duration.ofSeconds(31556952));
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/**
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* Unit that represents the concept of a decade.
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* For the ISO calendar system, it is equal to 10 years.
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*
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* When used with other calendar systems it must correspond to an integral number of days
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* and is normally an integral number of years.
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*/
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ChronoUnit.DECADES = new ChronoUnit('Decades', Duration.ofSeconds(31556952 * 10));
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/**
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* Unit that represents the concept of a century.
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* For the ISO calendar system, it is equal to 100 years.
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*
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* When used with other calendar systems it must correspond to an integral number of days
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* and is normally an integral number of years.
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*/
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ChronoUnit.CENTURIES = new ChronoUnit('Centuries', Duration.ofSeconds(31556952 * 100));
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/**
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* Unit that represents the concept of a millennium.
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* For the ISO calendar system, it is equal to 1000 years.
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*
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* When used with other calendar systems it must correspond to an integral number of days
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* and is normally an integral number of years.
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*/
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ChronoUnit.MILLENNIA = new ChronoUnit('Millennia', Duration.ofSeconds(31556952 * 1000));
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/**
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* Unit that represents the concept of an era.
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* The ISO calendar system doesn't have eras thus it is impossible to add
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* an era to a date or date-time.
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* The estimated duration of the era is artificially defined as {Year.MAX_VALUE} + 1.
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*
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* When used with other calendar systems there are no restrictions on the unit.
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*/
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ChronoUnit.ERAS = new ChronoUnit('Eras', Duration.ofSeconds(31556952 * (YearConstants.MAX_VALUE + 1)));
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/**
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* Artificial unit that represents the concept of forever.
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* This is primarily used with {@link TemporalField} to represent unbounded fields
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* such as the year or era.
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* The estimated duration of the era is artificially defined as the largest duration
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* supported by {@link Duration}.
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*/
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ChronoUnit.FOREVER = new ChronoUnit('Forever', Duration.ofSeconds(MathUtil.MAX_SAFE_INTEGER, 999999999));
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}
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