Examples with TimeZoneTransition android.icu.util.TimeZoneTransition used on opensource projects

Example 1 with TimeZoneTransition

use of android.icu.util.TimeZoneTransition in project j2objc by google.

the class TimeZoneRuleTest method hasEquivalentTransitions.

/*
     * Slightly modified version of BasicTimeZone#hasEquivalentTransitions.
     * This version returns true if transition time delta is within the given
     * delta range.
     */
private static boolean hasEquivalentTransitions(BasicTimeZone tz1, BasicTimeZone tz2, long start, long end, boolean ignoreDstAmount, int maxTransitionTimeDelta) {
    if (tz1.hasSameRules(tz2)) {
        return true;
    }
    // Check the offsets at the start time
    int[] offsets1 = new int[2];
    int[] offsets2 = new int[2];
    tz1.getOffset(start, false, offsets1);
    tz2.getOffset(start, false, offsets2);
    if (ignoreDstAmount) {
        if ((offsets1[0] + offsets1[1] != offsets2[0] + offsets2[1]) || (offsets1[1] != 0 && offsets2[1] == 0) || (offsets1[1] == 0 && offsets2[1] != 0)) {
            return false;
        }
    } else {
        if (offsets1[0] != offsets2[0] || offsets1[1] != offsets2[1]) {
            return false;
        }
    }
    // Check transitions in the range
    long time = start;
    while (true) {
        TimeZoneTransition tr1 = tz1.getNextTransition(time, false);
        TimeZoneTransition tr2 = tz2.getNextTransition(time, false);
        if (ignoreDstAmount) {
            // Skip a transition which only differ the amount of DST savings
            while (true) {
                if (tr1 != null && tr1.getTime() <= end && (tr1.getFrom().getRawOffset() + tr1.getFrom().getDSTSavings() == tr1.getTo().getRawOffset() + tr1.getTo().getDSTSavings()) && (tr1.getFrom().getDSTSavings() != 0 && tr1.getTo().getDSTSavings() != 0)) {
                    tr1 = tz1.getNextTransition(tr1.getTime(), false);
                } else {
                    break;
                }
            }
            while (true) {
                if (tr2 != null && tr2.getTime() <= end && (tr2.getFrom().getRawOffset() + tr2.getFrom().getDSTSavings() == tr2.getTo().getRawOffset() + tr2.getTo().getDSTSavings()) && (tr2.getFrom().getDSTSavings() != 0 && tr2.getTo().getDSTSavings() != 0)) {
                    tr2 = tz2.getNextTransition(tr2.getTime(), false);
                } else {
                    break;
                }
            }
        }
        boolean inRange1 = false;
        boolean inRange2 = false;
        if (tr1 != null) {
            if (tr1.getTime() <= end) {
                inRange1 = true;
            }
        }
        if (tr2 != null) {
            if (tr2.getTime() <= end) {
                inRange2 = true;
            }
        }
        if (!inRange1 && !inRange2) {
            // No more transition in the range
            break;
        }
        if (!inRange1 || !inRange2) {
            return false;
        }
        if (Math.abs(tr1.getTime() - tr2.getTime()) > maxTransitionTimeDelta) {
            return false;
        }
        if (ignoreDstAmount) {
            if (tr1.getTo().getRawOffset() + tr1.getTo().getDSTSavings() != tr2.getTo().getRawOffset() + tr2.getTo().getDSTSavings() || tr1.getTo().getDSTSavings() != 0 && tr2.getTo().getDSTSavings() == 0 || tr1.getTo().getDSTSavings() == 0 && tr2.getTo().getDSTSavings() != 0) {
                return false;
            }
        } else {
            if (tr1.getTo().getRawOffset() != tr2.getTo().getRawOffset() || tr1.getTo().getDSTSavings() != tr2.getTo().getDSTSavings()) {
                return false;
            }
        }
        time = tr1.getTime() > tr2.getTime() ? tr1.getTime() : tr2.getTime();
    }
    return true;
}

Example 2 with TimeZoneTransition

use of android.icu.util.TimeZoneTransition in project j2objc by google.

the class TimeZoneRuleTest method TestT6669.

@Test
public void TestT6669() {
    // getNext/PreviousTransition implementation in SimpleTimeZone
    // used to use a bad condition for detecting if DST is enabled or not.
    SimpleTimeZone stz = new SimpleTimeZone(0, "CustomID", Calendar.JANUARY, 1, Calendar.SUNDAY, 0, Calendar.JULY, 1, Calendar.SUNDAY, 0);
    // 2008-12-31T00:00:00
    long t = 1230681600000L;
    // 2009-01-04T00:00:00
    long expectedNext = 1231027200000L;
    // 2008-07-06T00:00:00
    long expectedPrev = 1215298800000L;
    TimeZoneTransition tzt = stz.getNextTransition(t, false);
    if (tzt == null) {
        errln("FAIL: No transition returned by getNextTransition.");
    } else if (tzt.getTime() != expectedNext) {
        errln("FAIL: Wrong transition time returned by getNextTransition - " + tzt.getTime() + " Expected: " + expectedNext);
    }
    tzt = stz.getPreviousTransition(t, true);
    if (tzt == null) {
        errln("FAIL: No transition returned by getPreviousTransition.");
    } else if (tzt.getTime() != expectedPrev) {
        errln("FAIL: Wrong transition time returned by getPreviousTransition - " + tzt.getTime() + " Expected: " + expectedPrev);
    }
}

Example 3 with TimeZoneTransition

use of android.icu.util.TimeZoneTransition in project j2objc by google.

the class TimeZoneRuleTest method verifyTransitions.

// Internal utility methods -----------------------------------------
/*
     * Check if a time shift really happens on each transition returned by getNextTransition or
     * getPreviousTransition in the specified time range
     */
private void verifyTransitions(TimeZone tz, long start, long end) {
    BasicTimeZone icutz = (BasicTimeZone) tz;
    long time;
    int[] before = new int[2];
    int[] after = new int[2];
    TimeZoneTransition tzt0;
    // Ascending
    tzt0 = null;
    time = start;
    while (true) {
        TimeZoneTransition tzt = icutz.getNextTransition(time, false);
        if (tzt == null) {
            break;
        }
        time = tzt.getTime();
        if (time >= end) {
            break;
        }
        icutz.getOffset(time, false, after);
        icutz.getOffset(time - 1, false, before);
        if (after[0] == before[0] && after[1] == before[1]) {
            errln("FAIL: False transition returned by getNextTransition for " + icutz.getID() + " at " + time);
        }
        if (tzt0 != null && (tzt0.getTo().getRawOffset() != tzt.getFrom().getRawOffset() || tzt0.getTo().getDSTSavings() != tzt.getFrom().getDSTSavings())) {
            errln("FAIL: TO rule of the previous transition does not match FROM rule of this transtion at " + time + " for " + icutz.getID());
        }
        tzt0 = tzt;
    }
    // Descending
    tzt0 = null;
    time = end;
    while (true) {
        TimeZoneTransition tzt = icutz.getPreviousTransition(time, false);
        if (tzt == null) {
            break;
        }
        time = tzt.getTime();
        if (time <= start) {
            break;
        }
        icutz.getOffset(time, false, after);
        icutz.getOffset(time - 1, false, before);
        if (after[0] == before[0] && after[1] == before[1]) {
            errln("FAIL: False transition returned by getPreviousTransition for " + icutz.getID() + " at " + time);
        }
        if (tzt0 != null && (tzt0.getFrom().getRawOffset() != tzt.getTo().getRawOffset() || tzt0.getFrom().getDSTSavings() != tzt.getTo().getDSTSavings())) {
            errln("FAIL: TO rule of the next transition does not match FROM rule in this transtion at " + time + " for " + icutz.getID());
        }
        tzt0 = tzt;
    }
}

Example 4 with TimeZoneTransition

use of android.icu.util.TimeZoneTransition in project j2objc by google.

the class TimeZoneRuleTest method compareTransitionsDescending.

/*
     * Compare all time transitions in 2 time zones in the specified time range in descending order
     */
private void compareTransitionsDescending(TimeZone tz1, TimeZone tz2, long start, long end, boolean inclusive) {
    BasicTimeZone z1 = (BasicTimeZone) tz1;
    BasicTimeZone z2 = (BasicTimeZone) tz2;
    String zid1 = tz1.getID();
    String zid2 = tz2.getID();
    long time = end;
    while (true) {
        TimeZoneTransition tzt1 = z1.getPreviousTransition(time, inclusive);
        TimeZoneTransition tzt2 = z2.getPreviousTransition(time, inclusive);
        boolean inRange1 = false;
        boolean inRange2 = false;
        if (tzt1 != null) {
            if (tzt1.getTime() > start || (inclusive && tzt1.getTime() == start)) {
                inRange1 = true;
            }
        }
        if (tzt2 != null) {
            if (tzt2.getTime() > start || (inclusive && tzt2.getTime() == start)) {
                inRange2 = true;
            }
        }
        if (!inRange1 && !inRange2) {
            // No more transition in the range
            break;
        }
        if (!inRange1) {
            errln("FAIL: " + zid1 + " does not have any transitions before " + time + " after " + start);
            break;
        }
        if (!inRange2) {
            errln("FAIL: " + zid2 + " does not have any transitions before " + time + " after " + start);
            break;
        }
        if (tzt1.getTime() != tzt2.getTime()) {
            errln("FAIL: Last transition before " + time + " " + zid1 + "[" + tzt1.getTime() + "] " + zid2 + "[" + tzt2.getTime() + "]");
            break;
        }
        time = tzt1.getTime();
        if (inclusive) {
            time--;
        }
    }
}

Example 5 with TimeZoneTransition

use of android.icu.util.TimeZoneTransition in project j2objc by google.

the class TimeZoneRuleTest method TestVTimeZoneRoundTripPartial.

/*
     * Write out time zone rules of OlsonTimeZone after a cutoff date into VTIMEZONE format,
     * create a new VTimeZone from the VTIMEZONE data, then compare transitions
     */
@Test
public void TestVTimeZoneRoundTripPartial() {
    long[] startTimes = new long[] { getUTCMillis(1900, Calendar.JANUARY, 1), getUTCMillis(1950, Calendar.JANUARY, 1), getUTCMillis(2020, Calendar.JANUARY, 1) };
    long endTime = getUTCMillis(2050, Calendar.JANUARY, 1);
    String[] tzids = getTestZIDs();
    for (int n = 0; n < startTimes.length; n++) {
        long startTime = startTimes[n];
        for (int i = 0; i < tzids.length; i++) {
            BasicTimeZone olsontz = (BasicTimeZone) TimeZone.getTimeZone(tzids[i], TimeZone.TIMEZONE_ICU);
            VTimeZone vtz_org = VTimeZone.create(tzids[i]);
            VTimeZone vtz_new = null;
            try {
                // Write out VTIMEZONE
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                OutputStreamWriter writer = new OutputStreamWriter(baos);
                vtz_org.write(writer, startTime);
                writer.close();
                byte[] vtzdata = baos.toByteArray();
                // Read VTIMEZONE
                ByteArrayInputStream bais = new ByteArrayInputStream(vtzdata);
                InputStreamReader reader = new InputStreamReader(bais);
                vtz_new = VTimeZone.create(reader);
                reader.close();
            } catch (IOException ioe) {
                errln("FAIL: IO error while writing/reading VTIMEZONE data");
            }
            // VTIMEZONE.
            if (vtz_new.getOffset(startTime) != olsontz.getOffset(startTime)) {
                errln("FAIL: VTimeZone for " + tzids[i] + " is not equivalent to its OlsonTimeZone corresponding at " + startTime);
            }
            TimeZoneTransition tzt = olsontz.getNextTransition(startTime, false);
            if (tzt != null) {
                if (!vtz_new.hasEquivalentTransitions(olsontz, tzt.getTime(), endTime, true)) {
                    int maxDelta = 1000;
                    if (!hasEquivalentTransitions(vtz_new, olsontz, tzt.getTime() + maxDelta, endTime, true, maxDelta)) {
                        errln("FAIL: VTimeZone for " + tzids[i] + "(>=" + startTime + ") is not equivalent to its OlsonTimeZone corresponding.");
                    } else {
                        logln("VTimeZone for " + tzids[i] + "(>=" + startTime + ")  differs from its OlsonTimeZone corresponding with maximum transition time delta - " + maxDelta);
                    }
                }
            }
        }
    }
}