@js-joda/extra
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additional date-time classes that complement those in js-joda
488 lines (461 loc) • 20.5 kB
JavaScript
/*
* @copyright (c) 2022, Philipp Thürwächter & Pattrick Hüper & Michał Sobkiewicz
* @copyright (c) 2007-present, Stephen Colebourne & Michael Nascimento Santos
* @license BSD-3-Clause (see LICENSE in the root directory of this source tree)
*/
import { ChronoField, Clock, DateTimeException, IllegalArgumentException, IsoChronology, LocalDate, Month, MonthDay, TemporalAccessor, TemporalQueries, TemporalQuery, UnsupportedTemporalTypeException, ZoneId } from '@js-joda/core';
// TODO: hm... is this a good idea?? copied from joda currently, could we add a js-joda-utils module??
import { requireInstance, requireNonNull } from './assert';
import { _ as jodaInternal } from '@js-joda/core';
const MathUtil = jodaInternal.MathUtil;
/**
* A day-of-month in the ISO-8601 calendar system.
*
* {@link DayOfMonth} is an immutable date-time object that represents a day-of-month.
* It is a type-safe way of representing a day-of-month in an application.
* Any field that can be derived from a day-of-month can be obtained.
*
* This class does not store or represent a year, month, time or time-zone.
* For example, the value '21' can be stored in a {@link DayOfMonth} and
* would represent the 21st day of any month.
*/
export class DayOfMonth extends TemporalAccessor {
//-----------------------------------------------------------------------
/**
* Function overloading for {@link DayOfMonth.now}:
* - if called with no arguments, {@link DayOfMonth._now0} is executed;
* - if called with an instance of {@link ZoneId}, then {@link DayOfMonth._nowZoneId} is executed;
* - if called with an instance of {@link Clock}, then {@link DayOfMonth._nowClock} is executed;
* - otherwise {@link IllegalArgumentException} is thrown.
*
* @param {?(ZoneId|Clock)} zoneIdOrClock
* @return {DayOfMonth}
*/
static now(zoneIdOrClock) {
switch (arguments.length) {
case 0:
return DayOfMonth._now0();
case 1:
requireNonNull(zoneIdOrClock, 'clockOrZone');
if (zoneIdOrClock instanceof ZoneId) {
return DayOfMonth._nowZoneId(zoneIdOrClock);
}
if (zoneIdOrClock instanceof Clock) {
return DayOfMonth._nowClock(zoneIdOrClock);
}
throw new IllegalArgumentException(`zoneIdOrClock must be an instance of ZoneId or Clock, but is ${zoneIdOrClock.constructor.name}`);
default:
throw new IllegalArgumentException(`Invalid number of arguments: ${arguments.length}`);
}
}
/**
* Obtains the current day-of-month from the system clock in the default time-zone.
*
* This will query the {@link Clock.systemDefaultZone} system clock in the default
* time-zone to obtain the current day-of-month.
* The zone and offset will be set based on the time-zone in the clock.
*
* Using this method will prevent the ability to use an alternate clock for testing
* because the clock is hard-coded.
*
* @return {DayOfMonth} the current day-of-month using the system clock and default time-zone, not null
* @protected
*/
static _now0() {
return this.now(Clock.systemDefaultZone());
}
/**
* Obtains the current day-of-month from the system clock in the specified time-zone.
*
* This will query the {@link Clock#system(java.time.ZoneId) system clock} to obtain the current day-of-month.
* Specifying the time-zone avoids dependence on the default time-zone.
*
* Using this method will prevent the ability to use an alternate clock for testing
* because the clock is hard-coded.
*
* @param {ZoneId} zone - the zone ID to use, not null
* @return {DayOfMonth} the current day-of-month using the system clock, not null
* @protected
*/
static _nowZoneId(zone) {
return this.now(Clock.system(zone));
}
/**
* Obtains the current day-of-month from the specified clock.
*
* This will query the specified clock to obtain the current day-of-month.
* 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} clock - the clock to use, not null
* @return {DayOfMonth} the current day-of-month, not null
* @protected
*/
static _nowClock(clock) {
const now = LocalDate.now(clock); // called once
return DayOfMonth.of(now.dayOfMonth());
}
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@link DayOfMonth}.
*
* A day-of-month object represents one of the 31 days of the month, from 1 to 31.
*
* @param {number} dayOfMonth - the day-of-month to represent, from 1 to 31
* @return {DayOfMonth} the day-of-month, not null
* @throws {DateTimeException} if the day-of-month is invalid
*/
static of(dayOfMonth) {
if (1 <= dayOfMonth && dayOfMonth <= 31) {
return DayOfMonth.VALUES[dayOfMonth - 1];
} else {
throw new DateTimeException(`Invalid value for DayOfMonth: ${dayOfMonth}`);
}
}
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@link DayOfMonth} from a date-time object.
*
* This obtains a day-of-month based on the specified temporal.
* A {@link TemporalAccessor} represents an arbitrary set of date and time information,
* which this factory converts to an instance of {@link DayOfMonth}.
*
* The conversion extracts the {@link ChronoField#DAY_OF_MONTH} day-of-month field.
* The extraction is only permitted if the temporal object has an ISO
* chronology, or can be converted to a {@link LocalDate}.
*
* This method matches the signature of the functional interface {@link TemporalQuery}
* allowing it to be used in queries via method reference, {@link DayOfMonth.from}.
*
* @param {TemporalAccessor} temporal - the temporal object to convert, not null
* @return {DayOfMonth} the day-of-month, not null
* @throws {DateTimeException} if unable to convert to a {@link DayOfMonth}
*/
static from(temporal) {
if (temporal instanceof DayOfMonth) {
return temporal;
}
requireNonNull(temporal, 'temporal');
try {
/* TODO: only IsoChronology for now
if (IsoChronology.INSTANCE.equals(Chronology.from(temporal)) == false) {
temporal = LocalDate.from(temporal);
}*/
return DayOfMonth.of(temporal.get(ChronoField.DAY_OF_MONTH));
} catch (ex) {
throw new DateTimeException(`Unable to obtain DayOfMonth from TemporalAccessor: ${temporal} of type ${temporal.constructor.name}`, ex);
}
}
//-----------------------------------------------------------------------
/**
* Constructor, previously validated.
*
* @param {number} dayOfMonth the day-of-month to represent, - from 1 to 31.
* @private
*/
constructor(dayOfMonth) {
super();
this._day = MathUtil.safeToInt(dayOfMonth);
}
//-----------------------------------------------------------------------
/**
* Gets the day-of-month value.
*
* @return {number} the day-of-month, from 1 to 31
*/
value() {
return this._day;
}
//-----------------------------------------------------------------------
/**
* Checks if the specified field is supported.
*
* This checks if this day-of-month can be queried for the specified field.
* If false, then calling the {@link DayOfMonth.range} range,
* {@link DayOfMonth.get} get and {@link DayOfMonth.getLong} getLong
* methods will throw an exception.
*
* If the field is a {@link ChronoField} then the query is implemented here.
* The supported fields are:
* <ul>
* <li>{@link ChronoField.DAY_OF_MONTH}
* </ul>
* All other {@link ChronoField} instances will return false.
*
* If the field is not a {@link ChronoField}, then the result of this method
* is obtained by invoking {@link TemporalField.isSupportedBy}
* passing this as the argument.
* Whether the field is supported is determined by the field.
*
* @param {TemporalField} field - the field to check, null returns false
* @return {boolean} true if the field is supported on this day-of-month, false if not
*/
isSupported(field) {
if (field instanceof ChronoField) {
return field === ChronoField.DAY_OF_MONTH;
}
return field != null && field.isSupportedBy(this);
}
//-----------------------------------------------------------------------
/**
* Gets the range of valid values for the specified field.
*
* The range object expresses the minimum and maximum valid values for a field.
* This day-of-month 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.
*
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link DayOfMonth.isSupported} supported fields will return
* appropriate range instances.
* All other {@link ChronoField} instances will throw an {@link UnsupportedTemporalTypeException}.
*
* If the field is not a {@link ChronoField}, then the result of this method
* is obtained by invoking {@link TemporalField.rangeRefinedBy}
* passing this as the argument.
* Whether the range can be obtained is determined by the field.
*
* @param {TemporalField} field - the field to query the range for, not null
* @return {ValueRange} 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
*/
range(field) {
requireNonNull(field, 'field');
if (field === ChronoField.DAY_OF_MONTH) {
return field.range();
}
return super.range(field);
}
/**
* Gets the value of the specified field from this day-of-month as an `int`.
*
* This queries this day-of-month for the value for 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.
*
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link DayOfMonth.isSupported} supported fields will return valid
* values based on this day-of-month.
* All other {@link ChronoField} instances will throw an {@link UnsupportedTemporalTypeException}.
*
* If the field is not a {@link ChronoField}, then the result of this method
* is obtained by invoking {@link TemporalField.getFrom}
* passing this as the argument. Whether the value can be obtained,
* and what the value represents, is determined by the field.
*
* @param {TemporalField} field - the field to get, not null
* @return {number} 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 `int`
* @throws {ArithmeticException} if numeric overflow occurs
*/
get(field) {
return this.range(field).checkValidIntValue(this.getLong(field), field);
}
/**
* Gets the value of the specified field from this day-of-month as a `long`.
*
* This queries this day-of-month for the value for 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.
*
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link DayOfMonth.isSupported(TemporalField) supported fields} will return valid
* values based on this day-of-month.
* All other {@link ChronoField} instances will throw an {@link UnsupportedTemporalTypeException}.
*
* If the field is not a {@link ChronoField}, then the result of this method
* is obtained by invoking {@link TemporalField.getFrom}
* passing this as the argument. Whether the value can be obtained,
* and what the value represents, is determined by the field.
*
* @param {TemporalField} field - the field to get, not null
* @return {number} 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
*/
getLong(field) {
requireNonNull(field, 'field');
if (field === ChronoField.DAY_OF_MONTH) {
return this._day;
} else if (field instanceof ChronoField) {
throw new UnsupportedTemporalTypeException(`Unsupported field: ${field}`);
}
return field.getFrom(this);
}
//-----------------------------------------------------------------------
/**
* Checks if the year-month is valid for this year.
*
* This method checks whether this day and the input year and month form
* a valid date.
*
* @param {YearMonth} yearMonth - the year month to validate, null returns false
* @return {boolean} true if the year and month are valid for this day
*/
isValidYearMonth(yearMonth) {
return yearMonth != null && yearMonth.isValidDay(this._day);
}
//-----------------------------------------------------------------------
/**
* Queries this day-of-month using the specified query.
*
* This queries this day-of-month using the specified query strategy object.
* The {@link 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.
*
* The result of this method is obtained by invoking the
* {@link TemporalQuery.queryFrom} method on the
* specified query passing this as the argument.
*
* @param {TemporalQuery} 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)
*/
query(query) {
requireNonNull(query, 'query');
requireInstance(query, TemporalQuery, 'query');
if (query === TemporalQueries.chronology()) {
return IsoChronology.INSTANCE;
}
return super.query(query);
}
/**
* Adjusts the specified temporal object to have this day-of-month.
*
* This returns a temporal object of the same observable type as the input
* with the day-of-month changed to be the same as this.
*
* The adjustment is equivalent to using {@link Temporal.with}
* passing {@link ChronoField.DAY_OF_MONTH} as the field.
* If the specified temporal object does not use the ISO calendar system then
* a {@link DateTimeException} is thrown.
*
* In most cases, it is clearer to reverse the calling pattern by using
* {@link Temporal.with}:
* ```
* // these two lines are equivalent, but the second approach is recommended
* temporal = thisDay.adjustInto(temporal);
* temporal = temporal.with(thisDay);
* ```
*
* This instance is immutable and unaffected by this method call.
*
* @param {Temporal} temporal - the target object to be adjusted, not null
* @return {Temporal} the adjusted object, not null
* @throws {DateTimeException} if unable to make the adjustment
* @throws {ArithmeticException} if numeric overflow occurs
*/
adjustInto(temporal) {
requireNonNull(temporal, 'temporal');
/* TODO: only IsoChronology for now
if (Chronology.from(temporal).equals(IsoChronology.INSTANCE) === false) {
throw new DateTimeException('Adjustment only supported on ISO date-time');
}*/
return temporal.with(ChronoField.DAY_OF_MONTH, this._day);
}
//-----------------------------------------------------------------------
/**
* Combines this day-of-month with a month to create a {@link MonthDay}.
*
* This returns a {@link MonthDay} formed from this day and the specified month.
*
* This method can be used as part of a chain to produce a date:
* ```
* LocalDate date = day.atMonth(month).atYear(year);
* ```
*
* If this day-of-month is invalid for the month then it will be changed
* to the last valid date for the month.
*
* @param {Month | number} month - the month-of-year to use, from 1 (January) to 12 (December), not null
* @return {MonthDay} the year-month formed from this year and the specified month, not null
*/
atMonth(month) {
requireNonNull(month, 'month');
if (month instanceof Month) {
return MonthDay.of(month, Math.min(this._day, month.maxLength()));
} else {
return MonthDay.of(month, Math.min(this._day, Month.of(month).maxLength()));
}
}
/**
* Combines this day-of-month with a year-month to create a {@link LocalDate}.
*
* This returns a {@link LocalDate} formed from this year and the specified year-month.
*
* If this day-of-month is invalid for the year-month then it will be changed
* to the last valid date for the month.
*
* @param {YearMonth} yearMonth - the year-month to use, not null
* @return {LocalDate} the local date formed from this year and the specified year-month, not null
*/
atYearMonth(yearMonth) {
requireNonNull(yearMonth, 'yearMonth');
return yearMonth.atDay(Math.min(this._day, yearMonth.lengthOfMonth()));
}
//-----------------------------------------------------------------------
/**
* Compares this day-of-month to another.
*
* The comparison is based on the value of the day.
* It is 'consistent with equals', as defined by {@link Comparable}.
*
* @param {DayOfMonth} other - the other day-of-month instance, not null
* @return {number} the comparator value, negative if less, positive if greater
*/
compareTo(other) {
requireNonNull(other, 'other');
requireInstance(other, DayOfMonth, 'other');
return this._day - other._day;
}
//-----------------------------------------------------------------------
/**
* Checks if this day-of-month is equal to another day-of-month.
*
* @param {*} obj - the other day-of-month instance, null returns false
* @return {boolean} true if the day-of-month is the same
*/
equals(obj) {
if (this === obj) {
return true;
}
if (obj instanceof DayOfMonth) {
return this._day === obj._day;
}
return false;
}
/**
* A hash code for this day-of-month.
*
* @return {number} a suitable hash code
*/
hashCode() {
return this._day;
}
//-----------------------------------------------------------------------
/**
* Outputs this day-of-month as a {@link String}.
*
* @return {string} a string representation of this day-of-month, not null
*/
toString() {
return `DayOfMonth:${this._day}`;
}
}
export function _init() {
/**
* Cache of singleton instances.
*/
DayOfMonth.VALUES = new Array(31);
for (let i = 0; i < 31; i++) {
DayOfMonth.VALUES[i] = new DayOfMonth(i + 1);
}
}