src/chrono/IsoChronology.js
/**
* @copyright (c) 2016, Philipp Thuerwaechter & Pattrick Hueper
* @copyright (c) 2007-present, Stephen Colebourne & Michael Nascimento Santos
* @license BSD-3-Clause (see LICENSE in the root directory of this source tree)
*/
import {Enum} from '../Enum';
import {LocalDate} from '../LocalDate';
import {Month} from '../Month';
import {Year} from '../Year';
import {ChronoField} from '../temporal/ChronoField';
import {ResolverStyle} from '../format/ResolverStyle';
export class IsoChronology extends Enum{
/**
* Checks if the year is a leap year, according to the ISO proleptic
* calendar system rules.
*
* This method applies the current rules for leap years across the whole time-line.
* In general, a year is a leap year if it is divisible by four without
* remainder. However, years divisible by 100, are not leap years, with
* the exception of years divisible by 400 which are.
*
* For example, 1904 is a leap year it is divisible by 4.
* 1900 was not a leap year as it is divisible by 100, however 2000 was a
* leap year as it is divisible by 400.
*
* The calculation is proleptic - applying the same rules into the far future and far past.
* This is historically inaccurate, but is correct for the ISO-8601 standard.
*
* @param {number} prolepticYear - the ISO proleptic year to check
* @return {boolean} true if the year is leap, false otherwise
*/
static isLeapYear(prolepticYear) {
return ((prolepticYear & 3) === 0) && ((prolepticYear % 100) !== 0 || (prolepticYear % 400) === 0);
}
resolveDate(fieldValues, resolverStyle) {
if (fieldValues.containsKey(ChronoField.EPOCH_DAY)) {
return LocalDate.ofEpochDay(fieldValues.remove(ChronoField.EPOCH_DAY));
}
// normalize fields
/*
var prolepticMonth = fieldValues.remove(PROLEPTIC_MONTH);
if (prolepticMonth != null) {
if (resolverStyle != ResolverStyle.LENIENT) {
PROLEPTIC_MONTH.checkValidValue(prolepticMonth);
}
updateResolveMap(fieldValues, ChronoField.MONTH_OF_YEAR, Jdk8Methods.floorMod(prolepticMonth, 12) + 1);
updateResolveMap(fieldValues, ChronoField.YEAR, Jdk8Methods.floorDiv(prolepticMonth, 12));
}
*/
// eras
/*
Long yoeLong = fieldValues.remove(YEAR_OF_ERA);
if (yoeLong != null) {
if (resolverStyle != ResolverStyle.LENIENT) {
YEAR_OF_ERA.checkValidValue(yoeLong);
}
Long era = fieldValues.remove(ERA);
if (era == null) {
Long year = fieldValues.get(ChronoField.YEAR);
if (resolverStyle == ResolverStyle.STRICT) {
// do not invent era if strict, but do cross-check with year
if (year != null) {
updateResolveMap(fieldValues, ChronoField.YEAR, (year > 0 ? yoeLong: Jdk8Methods.safeSubtract(1, yoeLong)));
} else {
// reinstate the field removed earlier, no cross-check issues
fieldValues.put(YEAR_OF_ERA, yoeLong);
}
} else {
// invent era
updateResolveMap(fieldValues, ChronoField.YEAR, (year == null || year > 0 ? yoeLong: Jdk8Methods.safeSubtract(1, yoeLong)));
}
} else if (era.longValue() == 1L) {
updateResolveMap(fieldValues, ChronoField.YEAR, yoeLong);
} else if (era.longValue() == 0L) {
updateResolveMap(fieldValues, ChronoField.YEAR, Jdk8Methods.safeSubtract(1, yoeLong));
} else {
throw new DateTimeException("Invalid value for era: " + era);
}
} else if (fieldValues.containsKey(ERA)) {
ERA.checkValidValue(fieldValues.get(ERA)); // always validated
}
*/
// build date
if (fieldValues.containsKey(ChronoField.YEAR)) {
if (fieldValues.containsKey(ChronoField.MONTH_OF_YEAR)) {
if (fieldValues.containsKey(ChronoField.DAY_OF_MONTH)) {
var y = ChronoField.YEAR.checkValidIntValue(fieldValues.remove(ChronoField.YEAR));
var moy = fieldValues.remove(ChronoField.MONTH_OF_YEAR);
var dom = fieldValues.remove(ChronoField.DAY_OF_MONTH);
if (resolverStyle === ResolverStyle.LENIENT) {
var months = moy - 1;
var days = dom - 1;
return LocalDate.of(y, 1, 1).plusMonths(months).plusDays(days);
} else if (resolverStyle === ResolverStyle.SMART){
ChronoField.DAY_OF_MONTH.checkValidValue(dom);
if (moy === 4 || moy === 6 || moy === 9 || moy === 11) {
dom = Math.min(dom, 30);
} else if (moy === 2) {
dom = Math.min(dom, Month.FEBRUARY.length(Year.isLeap(y)));
}
return LocalDate.of(y, moy, dom);
} else {
return LocalDate.of(y, moy, dom);
}
}
/*
if (fieldValues.containsKey(ALIGNED_WEEK_OF_MONTH)) {
if (fieldValues.containsKey(ALIGNED_DAY_OF_WEEK_IN_MONTH)) {
int y = ChronoField.YEAR.checkValidIntValue(fieldValues.remove(ChronoField.YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long months = Jdk8Methods.safeSubtract(fieldValues.remove(ChronoField.MONTH_OF_YEAR), 1);
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_MONTH), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_MONTH), 1);
return LocalDate.of(y, 1, 1).plusMonths(months).plusWeeks(weeks).plusDays(days);
}
int moy = ChronoField.MONTH_OF_YEAR.checkValidIntValue(fieldValues.remove(ChronoField.MONTH_OF_YEAR));
int aw = ALIGNED_WEEK_OF_MONTH.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_MONTH));
int ad = ALIGNED_DAY_OF_WEEK_IN_MONTH.checkValidIntValue(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_MONTH));
LocalDate date = LocalDate.of(y, moy, 1).plusDays((aw - 1) * 7 + (ad - 1));
if (resolverStyle == ResolverStyle.STRICT && date.get(ChronoField.MONTH_OF_YEAR) != moy) {
throw new DateTimeException("Strict mode rejected date parsed to a different month");
}
return date;
}
if (fieldValues.containsKey(DAY_OF_WEEK)) {
int y = ChronoField.YEAR.checkValidIntValue(fieldValues.remove(ChronoField.YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long months = Jdk8Methods.safeSubtract(fieldValues.remove(ChronoField.MONTH_OF_YEAR), 1);
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_MONTH), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_WEEK), 1);
return LocalDate.of(y, 1, 1).plusMonths(months).plusWeeks(weeks).plusDays(days);
}
int moy = ChronoField.MONTH_OF_YEAR.checkValidIntValue(fieldValues.remove(ChronoField.MONTH_OF_YEAR));
int aw = ALIGNED_WEEK_OF_MONTH.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_MONTH));
int dow = DAY_OF_WEEK.checkValidIntValue(fieldValues.remove(DAY_OF_WEEK));
LocalDate date = LocalDate.of(y, moy, 1).plusWeeks(aw - 1).with(nextOrSame(DayOfWeek.of(dow)));
if (resolverStyle == ResolverStyle.STRICT && date.get(ChronoField.MONTH_OF_YEAR) != moy) {
throw new DateTimeException("Strict mode rejected date parsed to a different month");
}
return date;
}
}
*/
}
/*
if (fieldValues.containsKey(DAY_OF_YEAR)) {
int y = ChronoField.YEAR.checkValidIntValue(fieldValues.remove(ChronoField.YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_YEAR), 1);
return LocalDate.ofYearDay(y, 1).plusDays(days);
}
int doy = DAY_OF_YEAR.checkValidIntValue(fieldValues.remove(DAY_OF_YEAR));
return LocalDate.ofYearDay(y, doy);
}
*/
/*
if (fieldValues.containsKey(ALIGNED_WEEK_OF_YEAR)) {
if (fieldValues.containsKey(ALIGNED_DAY_OF_WEEK_IN_YEAR)) {
int y = ChronoField.YEAR.checkValidIntValue(fieldValues.remove(ChronoField.YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_YEAR), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_YEAR), 1);
return LocalDate.of(y, 1, 1).plusWeeks(weeks).plusDays(days);
}
int aw = ALIGNED_WEEK_OF_YEAR.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_YEAR));
int ad = ALIGNED_DAY_OF_WEEK_IN_YEAR.checkValidIntValue(fieldValues.remove(ALIGNED_DAY_OF_WEEK_IN_YEAR));
LocalDate date = LocalDate.of(y, 1, 1).plusDays((aw - 1) * 7 + (ad - 1));
if (resolverStyle == ResolverStyle.STRICT && date.get(ChronoField.YEAR) != y) {
throw new DateTimeException("Strict mode rejected date parsed to a different year");
}
return date;
}
if (fieldValues.containsKey(DAY_OF_WEEK)) {
int y = ChronoField.YEAR.checkValidIntValue(fieldValues.remove(ChronoField.YEAR));
if (resolverStyle == ResolverStyle.LENIENT) {
long weeks = Jdk8Methods.safeSubtract(fieldValues.remove(ALIGNED_WEEK_OF_YEAR), 1);
long days = Jdk8Methods.safeSubtract(fieldValues.remove(DAY_OF_WEEK), 1);
return LocalDate.of(y, 1, 1).plusWeeks(weeks).plusDays(days);
}
int aw = ALIGNED_WEEK_OF_YEAR.checkValidIntValue(fieldValues.remove(ALIGNED_WEEK_OF_YEAR));
int dow = DAY_OF_WEEK.checkValidIntValue(fieldValues.remove(DAY_OF_WEEK));
LocalDate date = LocalDate.of(y, 1, 1).plusWeeks(aw - 1).with(nextOrSame(DayOfWeek.of(dow)));
if (resolverStyle == ResolverStyle.STRICT && date.get(ChronoField.YEAR) != y) {
throw new DateTimeException("Strict mode rejected date parsed to a different month");
}
return date;
}
}
*/
}
return null;
}
}
export function _init() {
IsoChronology.INSTANCE = new IsoChronology('IsoChronology');
}
