/*
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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 { requireNonNull } from './assert';
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import { DateTimeException, IllegalArgumentException } from './errors';
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import { StringUtil } from './StringUtil';
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import { ZoneOffset } from './ZoneOffset';
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import { ZoneRegion } from './ZoneRegion';
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import { ZoneId } from './ZoneId';
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import { TemporalQueries } from './temporal/TemporalQueries';
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import { SystemDefaultZoneId } from './zone/SystemDefaultZoneId';
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import { ZoneRulesProvider } from './zone/ZoneRulesProvider';
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/**
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* @see {@link ZoneId}
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*
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* Helper class to avoid dependency cycles.
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* Static methods of the class ZoneIdFactory are added automatically to class ZoneId.
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* @private
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*/
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export class ZoneIdFactory {
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/**
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* Gets the system default time-zone.
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*
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*
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* @return {ZoneId} the zone ID, not null
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*/
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static systemDefault() {
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return SYSTEM_DEFAULT_ZONE_ID_INSTANCE;
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}
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/**
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* Gets the set of available zone IDs.
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*
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* This set includes the string form of all available region-based IDs.
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* Offset-based zone IDs are not included in the returned set.
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* The ID can be passed to {@link of} to create a {@link ZoneId}.
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*
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* The set of zone IDs can increase over time, although in a typical application
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* the set of IDs is fixed. Each call to this method is thread-safe.
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*
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* @return {string[]} a modifiable copy of the set of zone IDs, not null
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*/
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static getAvailableZoneIds() {
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return ZoneRulesProvider.getAvailableZoneIds();
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}
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/**
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* Obtains an instance of {@link ZoneId} from an ID ensuring that the
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* ID is valid and available for use.
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*
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* This method parses the ID producing a {@link ZoneId} or {@link ZoneOffset}.
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* A {@link ZoneOffset} is returned if the ID is 'Z', or starts with '+' or '-'.
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* The result will always be a valid ID for which {@link ZoneRules} can be obtained.
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*
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* Parsing matches the zone ID step by step as follows.
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*
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* * If the zone ID equals 'Z', the result is {@link ZoneOffset.UTC}.
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* * If the zone ID consists of a single letter, the zone ID is invalid
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* and {@link DateTimeException} is thrown.
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* * If the zone ID starts with '+' or '-', the ID is parsed as a
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* {@link ZoneOffset} using {@link ZoneOffset#of}.
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* * If the zone ID equals 'GMT', 'UTC' or 'UT' then the result is a {@link ZoneId}
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* with the same ID and rules equivalent to {@link ZoneOffset.UTC}.
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* * If the zone ID starts with 'UTC+', 'UTC-', 'GMT+', 'GMT-', 'UT+' or 'UT-'
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* then the ID is a prefixed offset-based ID. The ID is split in two, with
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* a two or three letter prefix and a suffix starting with the sign.
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* The suffix is parsed as a {@link ZoneOffset}.
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* The result will be a {@link ZoneId} with the specified UTC/GMT/UT prefix
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* and the normalized offset ID as per {@link ZoneOffset#getId}.
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* The rules of the returned {@link ZoneId} will be equivalent to the
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* parsed {@link ZoneOffset}.
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* * All other IDs are parsed as region-based zone IDs. Region IDs must
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* match the regular expression `[A-Za-z][A-Za-z0-9~/._+-]+`,
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* otherwise a {@link DateTimeException} is thrown. If the zone ID is not
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* in the configured set of IDs, {@link ZoneRulesException} is thrown.
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* The detailed format of the region ID depends on the group supplying the data.
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* The default set of data is supplied by the IANA Time Zone Database (TZDB).
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* This has region IDs of the form '{area}/{city}', such as 'Europe/Paris' or 'America/New_York'.
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* This is compatible with most IDs from {@link java.util.TimeZone}.
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*
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* @param {string} zoneId the time-zone ID, not null
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* @return {ZoneId} the zone ID, not null
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* @throws DateTimeException if the zone ID has an invalid format
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* @throws ZoneRulesException if the zone ID is a region ID that cannot be found
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*/
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static of(zoneId) {
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requireNonNull(zoneId, 'zoneId');
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if (zoneId === 'Z') {
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return ZoneOffset.UTC;
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}
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if (zoneId.length === 1) {
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throw new DateTimeException(`Invalid zone: ${zoneId}`);
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}
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if (StringUtil.startsWith(zoneId, '+') || StringUtil.startsWith(zoneId, '-')) {
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return ZoneOffset.of(zoneId);
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}
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if (zoneId === 'UTC' || zoneId === 'GMT' || zoneId === 'GMT0' || zoneId === 'UT') {
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return new ZoneRegion(zoneId, ZoneOffset.UTC.rules());
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}
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if (StringUtil.startsWith(zoneId, 'UTC+') || StringUtil.startsWith(zoneId, 'GMT+') ||
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StringUtil.startsWith(zoneId, 'UTC-') || StringUtil.startsWith(zoneId, 'GMT-')) {
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const offset = ZoneOffset.of(zoneId.substring(3));
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if (offset.totalSeconds() === 0) {
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return new ZoneRegion(zoneId.substring(0, 3), offset.rules());
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}
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return new ZoneRegion(zoneId.substring(0, 3) + offset.id(), offset.rules());
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}
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if (StringUtil.startsWith(zoneId, 'UT+') || StringUtil.startsWith(zoneId, 'UT-')) {
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const offset = ZoneOffset.of(zoneId.substring(2));
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if (offset.totalSeconds() === 0) {
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return new ZoneRegion('UT', offset.rules());
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}
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return new ZoneRegion(`UT${offset.id()}`, offset.rules());
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}
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// javascript special case
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if(zoneId === 'SYSTEM'){
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return ZoneId.systemDefault();
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}
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return ZoneRegion.ofId(zoneId);
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}
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/**
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* Obtains an instance of {@link ZoneId} wrapping an offset.
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*
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* If the prefix is 'GMT', 'UTC', or 'UT' a {@link ZoneId}
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* with the prefix and the non-zero offset is returned.
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* If the prefix is empty `''` the {@link ZoneOffset} is returned.
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*
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* @param {string} prefix the time-zone ID, not null
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* @param {ZoneOffset} offset the offset, not null
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* @return {ZoneId} the zone ID, not null
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* @throws IllegalArgumentException if the prefix is not one of
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* 'GMT', 'UTC', or 'UT', or ''
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*/
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static ofOffset(prefix, offset) {
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requireNonNull(prefix, 'prefix');
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requireNonNull(offset, 'offset');
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if (prefix.length === 0) {
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return offset;
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}
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if (prefix === 'GMT' || prefix === 'UTC' || prefix === 'UT') {
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if (offset.totalSeconds() === 0) {
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return new ZoneRegion(prefix, offset.rules());
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}
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return new ZoneRegion(prefix + offset.id(), offset.rules());
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}
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throw new IllegalArgumentException(`Invalid prefix, must be GMT, UTC or UT: ${prefix}`);
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}
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/**
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* Obtains an instance of {@link ZoneId} from a temporal object.
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*
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* A {@link TemporalAccessor} represents some form of date and time information.
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* This factory converts the arbitrary temporal object to an instance of {@link ZoneId}.
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*
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* The conversion will try to obtain the zone in a way that favours region-based
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* zones over offset-based zones using {@link TemporalQueries#zone}.
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*
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* This method matches the signature of the functional interface {@link TemporalQuery}
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* allowing it to be used in queries via method reference, {@link ZoneId::from}.
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*
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* @param {!TemporalAccessor} temporal - the temporal object to convert, not null
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* @return {ZoneId} the zone ID, not null
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* @throws DateTimeException if unable to convert to a {@link ZoneId}
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*/
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static from(temporal) {
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requireNonNull(temporal, 'temporal');
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const obj = temporal.query(TemporalQueries.zone());
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if (obj == null) {
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throw new DateTimeException(`Unable to obtain ZoneId from TemporalAccessor: ${
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temporal}, type ${temporal.constructor != null ? temporal.constructor.name : ''}`);
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}
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return obj;
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}
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}
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let SYSTEM_DEFAULT_ZONE_ID_INSTANCE = null;
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export function _init(){
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SYSTEM_DEFAULT_ZONE_ID_INSTANCE = new SystemDefaultZoneId();
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// a bit magic to stay a bit more to the threeten bp impl.
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ZoneId.systemDefault = ZoneIdFactory.systemDefault;
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ZoneId.getAvailableZoneIds = ZoneIdFactory.getAvailableZoneIds;
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ZoneId.of = ZoneIdFactory.of;
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ZoneId.ofOffset = ZoneIdFactory.ofOffset;
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ZoneId.from = ZoneIdFactory.from;
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ZoneOffset.from = ZoneIdFactory.from;
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// short cut
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ZoneId.SYSTEM = SYSTEM_DEFAULT_ZONE_ID_INSTANCE;
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ZoneId.UTC = ZoneOffset.ofTotalSeconds(0);
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}
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