Examples with ZoneRules java.time.zone.ZoneRules used on opensource projects

Example 31 with ZoneRules

use of java.time.zone.ZoneRules in project jdk8u_jdk by JetBrains.

the class ZoneRegion method ofId.

/**
     * Obtains an instance of {@code ZoneId} from an identifier.
     *
     * @param zoneId  the time-zone ID, not null
     * @param checkAvailable  whether to check if the zone ID is available
     * @return the zone ID, not null
     * @throws DateTimeException if the ID format is invalid
     * @throws ZoneRulesException if checking availability and the ID cannot be found
     */
static ZoneRegion ofId(String zoneId, boolean checkAvailable) {
    Objects.requireNonNull(zoneId, "zoneId");
    checkName(zoneId);
    ZoneRules rules = null;
    try {
        // always attempt load for better behavior after deserialization
        rules = ZoneRulesProvider.getRules(zoneId, true);
    } catch (ZoneRulesException ex) {
        if (checkAvailable) {
            throw ex;
        }
    }
    return new ZoneRegion(zoneId, rules);
}

Example 32 with ZoneRules

use of java.time.zone.ZoneRules in project jdk8u_jdk by JetBrains.

the class ZonedDateTime method ofStrict.

//-----------------------------------------------------------------------
/**
     * Obtains an instance of {@code ZonedDateTime} strictly validating the
     * combination of local date-time, offset and zone ID.
     * <p>
     * This creates a zoned date-time ensuring that the offset is valid for the
     * local date-time according to the rules of the specified zone.
     * If the offset is invalid, an exception is thrown.
     *
     * @param localDateTime  the local date-time, not null
     * @param offset  the zone offset, not null
     * @param zone  the time-zone, not null
     * @return the zoned date-time, not null
     */
public static ZonedDateTime ofStrict(LocalDateTime localDateTime, ZoneOffset offset, ZoneId zone) {
    Objects.requireNonNull(localDateTime, "localDateTime");
    Objects.requireNonNull(offset, "offset");
    Objects.requireNonNull(zone, "zone");
    ZoneRules rules = zone.getRules();
    if (rules.isValidOffset(localDateTime, offset) == false) {
        ZoneOffsetTransition trans = rules.getTransition(localDateTime);
        if (trans != null && trans.isGap()) {
            // even though there are other kinds of gaps
            throw new DateTimeException("LocalDateTime '" + localDateTime + "' does not exist in zone '" + zone + "' due to a gap in the local time-line, typically caused by daylight savings");
        }
        throw new DateTimeException("ZoneOffset '" + offset + "' is not valid for LocalDateTime '" + localDateTime + "' in zone '" + zone + "'");
    }
    return new ZonedDateTime(localDateTime, offset, zone);
}

Example 33 with ZoneRules

use of java.time.zone.ZoneRules in project jdk8u_jdk by JetBrains.

the class ChronoZonedDateTimeImpl method ofBest.

//-----------------------------------------------------------------------
/**
     * Obtains an instance from a local date-time using the preferred offset if possible.
     *
     * @param localDateTime  the local date-time, not null
     * @param zone  the zone identifier, not null
     * @param preferredOffset  the zone offset, null if no preference
     * @return the zoned date-time, not null
     */
static <R extends ChronoLocalDate> ChronoZonedDateTime<R> ofBest(ChronoLocalDateTimeImpl<R> localDateTime, ZoneId zone, ZoneOffset preferredOffset) {
    Objects.requireNonNull(localDateTime, "localDateTime");
    Objects.requireNonNull(zone, "zone");
    if (zone instanceof ZoneOffset) {
        return new ChronoZonedDateTimeImpl<>(localDateTime, (ZoneOffset) zone, zone);
    }
    ZoneRules rules = zone.getRules();
    LocalDateTime isoLDT = LocalDateTime.from(localDateTime);
    List<ZoneOffset> validOffsets = rules.getValidOffsets(isoLDT);
    ZoneOffset offset;
    if (validOffsets.size() == 1) {
        offset = validOffsets.get(0);
    } else if (validOffsets.size() == 0) {
        ZoneOffsetTransition trans = rules.getTransition(isoLDT);
        localDateTime = localDateTime.plusSeconds(trans.getDuration().getSeconds());
        offset = trans.getOffsetAfter();
    } else {
        if (preferredOffset != null && validOffsets.contains(preferredOffset)) {
            offset = preferredOffset;
        } else {
            offset = validOffsets.get(0);
        }
    }
    // protect against bad ZoneRules
    Objects.requireNonNull(offset, "offset");
    return new ChronoZonedDateTimeImpl<>(localDateTime, offset, zone);
}

Example 34 with ZoneRules

use of java.time.zone.ZoneRules in project jdk8u_jdk by JetBrains.

the class ChronoZonedDateTimeImpl method ofInstant.

/**
     * Obtains an instance from an instant using the specified time-zone.
     *
     * @param chrono  the chronology, not null
     * @param instant  the instant, not null
     * @param zone  the zone identifier, not null
     * @return the zoned date-time, not null
     */
static ChronoZonedDateTimeImpl<?> ofInstant(Chronology chrono, Instant instant, ZoneId zone) {
    ZoneRules rules = zone.getRules();
    ZoneOffset offset = rules.getOffset(instant);
    // protect against bad ZoneRules
    Objects.requireNonNull(offset, "offset");
    LocalDateTime ldt = LocalDateTime.ofEpochSecond(instant.getEpochSecond(), instant.getNano(), offset);
    ChronoLocalDateTimeImpl<?> cldt = (ChronoLocalDateTimeImpl<?>) chrono.localDateTime(ldt);
    return new ChronoZonedDateTimeImpl<>(cldt, offset, zone);
}

Example 35 with ZoneRules

use of java.time.zone.ZoneRules in project jdk8u_jdk by JetBrains.

the class ZonedDateTime method ofLocal.

/**
     * Obtains an instance of {@code ZonedDateTime} from a local date-time
     * using the preferred offset if possible.
     * <p>
     * The local date-time is resolved to a single instant on the time-line.
     * This is achieved by finding a valid offset from UTC/Greenwich for the local
     * date-time as defined by the {@link ZoneRules rules} of the zone ID.
     *<p>
     * In most cases, there is only one valid offset for a local date-time.
     * In the case of an overlap, where clocks are set back, there are two valid offsets.
     * If the preferred offset is one of the valid offsets then it is used.
     * Otherwise the earlier valid offset is used, typically corresponding to "summer".
     * <p>
     * In the case of a gap, where clocks jump forward, there is no valid offset.
     * Instead, the local date-time is adjusted to be later by the length of the gap.
     * For a typical one hour daylight savings change, the local date-time will be
     * moved one hour later into the offset typically corresponding to "summer".
     *
     * @param localDateTime  the local date-time, not null
     * @param zone  the time-zone, not null
     * @param preferredOffset  the zone offset, null if no preference
     * @return the zoned date-time, not null
     */
public static ZonedDateTime ofLocal(LocalDateTime localDateTime, ZoneId zone, ZoneOffset preferredOffset) {
    Objects.requireNonNull(localDateTime, "localDateTime");
    Objects.requireNonNull(zone, "zone");
    if (zone instanceof ZoneOffset) {
        return new ZonedDateTime(localDateTime, (ZoneOffset) zone, zone);
    }
    ZoneRules rules = zone.getRules();
    List<ZoneOffset> validOffsets = rules.getValidOffsets(localDateTime);
    ZoneOffset offset;
    if (validOffsets.size() == 1) {
        offset = validOffsets.get(0);
    } else if (validOffsets.size() == 0) {
        ZoneOffsetTransition trans = rules.getTransition(localDateTime);
        localDateTime = localDateTime.plusSeconds(trans.getDuration().getSeconds());
        offset = trans.getOffsetAfter();
    } else {
        if (preferredOffset != null && validOffsets.contains(preferredOffset)) {
            offset = preferredOffset;
        } else {
            // protect against bad ZoneRules
            offset = Objects.requireNonNull(validOffsets.get(0), "offset");
        }
    }
    return new ZonedDateTime(localDateTime, offset, zone);
}