Merge "Take into account obsoleted zone IDs" (23d290e3) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/TimeZoneLookupHelper.java

+20 −3

Original line number	Diff line number	Diff line
		@@ -97,15 +97,26 @@ public class TimeZoneLookupHelper {
		public final String zoneId;

		/**
		* True if all the time zones in the country have the same offset at {@link #whenMillis}.
		* True if the country has multiple effective zones to choose from at {@link #whenMillis}.
		*/
		public final boolean multipleZonesInCountry;

		/**
		* True if all the effective time zones in the country have the same offset at
		* {@link #whenMillis}.
		*/
		public final boolean allZonesHaveSameOffset;

		/** The time associated with {@link #allZonesHaveSameOffset}. */
		/**
		* The time associated with {@link #allZonesHaveSameOffset} and
		* {@link #multipleZonesInCountry}.
		*/
		public final long whenMillis;

		public CountryResult(String zoneId, boolean allZonesHaveSameOffset, long whenMillis) {
		public CountryResult(String zoneId, boolean multipleZonesInCountry,
		boolean allZonesHaveSameOffset, long whenMillis) {
		this.zoneId = zoneId;
		this.multipleZonesInCountry = multipleZonesInCountry;
		this.allZonesHaveSameOffset = allZonesHaveSameOffset;
		this.whenMillis = whenMillis;
		}
		@@ -121,6 +132,9 @@ public class TimeZoneLookupHelper {

		CountryResult that = (CountryResult) o;

		if (multipleZonesInCountry != that.multipleZonesInCountry) {
		return false;
		}
		if (allZonesHaveSameOffset != that.allZonesHaveSameOffset) {
		return false;
		}
		@@ -133,6 +147,7 @@ public class TimeZoneLookupHelper {
		@Override
		public int hashCode() {
		int result = zoneId.hashCode();
		result = 31 * result + (multipleZonesInCountry ? 1 : 0);
		result = 31 * result + (allZonesHaveSameOffset ? 1 : 0);
		result = 31 * result + (int) (whenMillis ^ (whenMillis >>> 32));
		return result;
		@@ -142,6 +157,7 @@ public class TimeZoneLookupHelper {
		public String toString() {
		return "CountryResult{"
		+ "zoneId='" + zoneId + '\''
		+ ", multipleZonesInCountry=" + multipleZonesInCountry
		+ ", allZonesHaveSameOffset=" + allZonesHaveSameOffset
		+ ", whenMillis=" + whenMillis
		+ '}';
		@@ -211,6 +227,7 @@ public class TimeZoneLookupHelper {

		return new CountryResult(
		countryTimeZones.getDefaultTimeZoneId(),
		countryTimeZones.getEffectiveTimeZoneMappingsAt(whenMillis).size() > 1,
		countryTimeZones.isDefaultOkForCountryTimeZoneDetection(whenMillis),
		whenMillis);
		}

tests/telephonytests/src/com/android/internal/telephony/NitzStateMachineImplTest.java

+6 −2

Original line number	Diff line number	Diff line
		@@ -111,7 +111,9 @@ public class NitzStateMachineImplTest extends TelephonyTest {

		// allZonesHaveSameOffset == false, so we shouldn't pick an arbitrary zone.
		CountryResult expectedCountryLookupResult = new CountryResult(
		"America/New_York", false /* allZonesHaveSameOffset */,
		"America/New_York",
		true /* multipleZonesInCountry */,
		false /* allZonesHaveSameOffset */,
		UNIQUE_US_ZONE_SCENARIO.getInitialSystemClockMillis());
		CountryResult actualCountryLookupResult =
		mRealTimeZoneLookupHelper.lookupByCountry(
		@@ -135,7 +137,9 @@ public class NitzStateMachineImplTest extends TelephonyTest {
		// allZonesHaveSameOffset == true (not only that, there is only one zone), so we can pick
		// the zone knowing only the country.
		CountryResult expectedCountryLookupResult = new CountryResult(
		"Europe/London", true /* allZonesHaveSameOffset */,
		"Europe/London",
		false /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */,
		UNITED_KINGDOM_SCENARIO.getInitialSystemClockMillis());
		CountryResult actualCountryLookupResult =
		mRealTimeZoneLookupHelper.lookupByCountry(

tests/telephonytests/src/com/android/internal/telephony/TimeZoneLookupHelperTest.java

+114 −56

Original line number	Diff line number	Diff line
		@@ -146,19 +146,74 @@ public class TimeZoneLookupHelperTest {
		}

		@Test
		public void testLookupByNitzCountry() {
		public void testLookupByNitzCountry_filterByEffectiveDate() {
		// America/North_Dakota/Beulah was on Mountain Time until 2010-11-07, when it switched to
		// Central Time.
		String usIso = "US";

		// Try MDT / -6 hours in summer before America/North_Dakota/Beulah switched to Central Time.
		{
		String nitzString = "10/11/05,00:00:00-24,1"; // 2010-11-05 00:00:00 UTC, UTC-6, DST
		NitzData nitzData = NitzData.parse(nitzString);
		// The zone chosen is a side effect of zone ordering in the data files so we just check
		// the isOnlyMatch value.
		OffsetResult offsetResult = mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, usIso);
		assertFalse(offsetResult.getIsOnlyMatch());
		}

		// Try MDT / -6 hours in summer after America/North_Dakota/Beulah switched to central time.
		{
		String nitzString = "11/11/05,00:00:00-24,1"; // 2011-11-05 00:00:00 UTC, UTC-6, DST
		NitzData nitzData = NitzData.parse(nitzString);
		OffsetResult offsetResult = mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, usIso);
		assertTrue(offsetResult.getIsOnlyMatch());
		}
		}

		@Test
		public void testLookupByNitzCountry_multipleMatches() {
		// America/Denver & America/Phoenix share the same Mountain Standard Time offset (i.e.
		// during winter).
		String usIso = "US";

		// Try MDT for a recent summer date: No ambiguity here.
		{
		String nitzString = "15/06/01,00:00:00-24,1"; // 2015-06-01 00:00:00 UTC, UTC-6, DST
		NitzData nitzData = NitzData.parse(nitzString);
		OffsetResult offsetResult = mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, usIso);
		assertTrue(offsetResult.getIsOnlyMatch());
		}

		// Try MST for a recent summer date: No ambiguity here.
		{
		String nitzString = "15/06/01,00:00:00-28,0"; // 2015-06-01 00:00:00 UTC, UTC-7, not DST
		NitzData nitzData = NitzData.parse(nitzString);
		OffsetResult offsetResult = mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, usIso);
		assertTrue(offsetResult.getIsOnlyMatch());
		}

		// Try MST for a recent winter date: There are multiple zones to pick from because of the
		// America/Denver & America/Phoenix ambiguity.
		{
		String nitzString = "15/01/01,00:00:00-28,0"; // 2015-01-01 00:00:00 UTC, UTC-7, not DST
		NitzData nitzData = NitzData.parse(nitzString);
		OffsetResult offsetResult = mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, usIso);
		assertFalse(offsetResult.getIsOnlyMatch());
		}
		}

		@Test
		public void testLookupByNitzCountry_dstKnownAndUnknown() {
		// Historical dates are used to avoid the test breaking due to data changes.
		// However, algorithm updates may change the exact time zone returned, though it shouldn't
		// ever be a less exact match.
		long nhSummerTimeMillis = createUtcTime(2015, 6, 20, 1, 2, 3);
		long nhWinterTimeMillis = createUtcTime(2015, 1, 20, 1, 2, 3);

		// Two countries in the northern hemisphere that share the same Winter and Summer DST
		// offsets at the dates being used.
		String deIso = "DE"; // Germany
		// A country in the northern hemisphere with one time zone.
		String adIso = "AD"; // Andora
		String summerTimeNitzString = "15/06/20,01:02:03+8";
		String winterTimeNitzString = "15/01/20,01:02:03+4";
		String summerTimeNitzString = "15/06/20,01:02:03+8"; // 2015-06-20 01:02:03 UTC, UTC+2
		String winterTimeNitzString = "15/01/20,01:02:03+4"; // 2015-01-20 01:02:03 UTC, UTC+1

		// Summer, known DST state (DST == true).
		{
		@@ -169,18 +224,10 @@ public class TimeZoneLookupHelperTest {
		assertEquals(expectedUtcOffset, nitzData.getLocalOffsetMillis());
		assertEquals(expectedDstOffset, nitzData.getDstAdjustmentMillis());

		OffsetResult expectedResult;

		OffsetResult deSummerWithDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, deIso);
		expectedResult = new OffsetResult(zone("Europe/Berlin"), false /* isOnlyMatch */);
		assertEquals(expectedResult, deSummerWithDstResult);
		assertOffsetResultZoneOffsets(nhSummerTimeMillis, expectedUtcOffset, expectedDstOffset,
		deSummerWithDstResult);

		OffsetResult adSummerWithDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, adIso);
		expectedResult = new OffsetResult(zone("Europe/Andorra"), true /* isOnlyMatch */);
		OffsetResult expectedResult =
		new OffsetResult(zone("Europe/Andorra"), true /* isOnlyMatch */);
		assertEquals(expectedResult, adSummerWithDstResult);
		assertOffsetResultZoneOffsets(nhSummerTimeMillis, expectedUtcOffset, expectedDstOffset,
		adSummerWithDstResult);
		@@ -196,18 +243,10 @@ public class TimeZoneLookupHelperTest {
		assertEquals(expectedUtcOffset, nitzData.getLocalOffsetMillis());
		assertEquals(expectedDstOffset, nitzData.getDstAdjustmentMillis());

		OffsetResult expectedResult;

		OffsetResult deWinterWithDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, deIso);
		expectedResult = new OffsetResult(zone("Europe/Berlin"), false /* isOnlyMatch */);
		assertEquals(expectedResult, deWinterWithDstResult);
		assertOffsetResultZoneOffsets(nhWinterTimeMillis, expectedUtcOffset, expectedDstOffset,
		deWinterWithDstResult);

		OffsetResult adWinterWithDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, adIso);
		expectedResult = new OffsetResult(zone("Europe/Andorra"), true /* isOnlyMatch */);
		OffsetResult expectedResult =
		new OffsetResult(zone("Europe/Andorra"), true /* isOnlyMatch */);
		assertEquals(expectedResult, adWinterWithDstResult);
		assertOffsetResultZoneOffsets(nhWinterTimeMillis, expectedUtcOffset, expectedDstOffset,
		adWinterWithDstResult);
		@@ -224,10 +263,6 @@ public class TimeZoneLookupHelperTest {
		assertEquals(expectedUtcOffset, nitzData.getLocalOffsetMillis());
		assertEquals(expectedDstOffset, nitzData.getDstAdjustmentMillis());

		OffsetResult deSummerUnknownDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, deIso);
		assertNull(deSummerUnknownDstResult);

		OffsetResult adSummerUnknownDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, adIso);
		assertNull(adSummerUnknownDstResult);
		@@ -241,18 +276,10 @@ public class TimeZoneLookupHelperTest {
		assertEquals(expectedUtcOffset, nitzData.getLocalOffsetMillis());
		assertEquals(expectedDstOffset, nitzData.getDstAdjustmentMillis());

		OffsetResult expectedResult;

		OffsetResult deWinterUnknownDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, deIso);
		expectedResult = new OffsetResult(zone("Europe/Berlin"), false /* isOnlyMatch */);
		assertEquals(expectedResult, deWinterUnknownDstResult);
		assertOffsetResultZoneOffsets(nhWinterTimeMillis, expectedUtcOffset, expectedDstOffset,
		deWinterUnknownDstResult);

		OffsetResult adWinterUnknownDstResult =
		mTimeZoneLookupHelper.lookupByNitzCountry(nitzData, adIso);
		expectedResult = new OffsetResult(zone("Europe/Andorra"), true /* isOnlyMatch */);
		OffsetResult expectedResult =
		new OffsetResult(zone("Europe/Andorra"), true /* isOnlyMatch */);
		assertEquals(expectedResult, adWinterUnknownDstResult);
		assertOffsetResultZoneOffsets(nhWinterTimeMillis, expectedUtcOffset, expectedDstOffset,
		adWinterUnknownDstResult);
		@@ -260,36 +287,67 @@ public class TimeZoneLookupHelperTest {
		}

		@Test
		public void testLookupByCountry() {
		public void testLookupByCountry_oneZone() {
		CountryResult expectedResult;

		// GB has one time zone.
		expectedResult = new CountryResult("Europe/London", true /* allZonesHaveSameOffset */,
		NH_SUMMER_TIME_MILLIS);
		expectedResult = new CountryResult("Europe/London", false /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */, NH_SUMMER_TIME_MILLIS);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("gb", NH_SUMMER_TIME_MILLIS));
		expectedResult = new CountryResult("Europe/London", true /* allZonesHaveSameOffset */,
		NH_WINTER_TIME_MILLIS);
		expectedResult = new CountryResult("Europe/London", false /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */, NH_WINTER_TIME_MILLIS);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("gb", NH_WINTER_TIME_MILLIS));
		}

		@Test
		public void testLookupByCountry_oneEffectiveZone() {
		// Historical dates are used to avoid the test breaking due to data changes.

		// DE has two time zones according to IANA data: Europe/Berlin and Europe/Busingen.
		expectedResult = new CountryResult("Europe/Berlin", true /* allZonesHaveSameOffset */,
		NH_SUMMER_TIME_MILLIS);
		// DE has two time zones according to IANA data: Europe/Berlin and Europe/Busingen, but they
		// become effectively identical after 338950800000 millis (Sun, 28 Sep 1980 01:00:00 GMT).
		// Android data tells us that Europe/Berlin the one that was "kept".
		long nhSummerTimeMillis = createUtcTime(1975, 6, 20, 1, 2, 3);
		long nhWinterTimeMillis = createUtcTime(1975, 1, 20, 1, 2, 3);

		CountryResult expectedResult;

		expectedResult = new CountryResult("Europe/Berlin", true /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */, nhSummerTimeMillis);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("de", NH_SUMMER_TIME_MILLIS));
		expectedResult = new CountryResult("Europe/Berlin", true /* allZonesHaveSameOffset */,
		NH_WINTER_TIME_MILLIS);
		mTimeZoneLookupHelper.lookupByCountry("de", nhSummerTimeMillis));
		expectedResult = new CountryResult("Europe/Berlin", true /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */, nhWinterTimeMillis);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("de", nhWinterTimeMillis));

		// And in 2015, multipleZonesInCountry == false because Europe/Busingen became irrelevant
		// after 1980.
		nhSummerTimeMillis = createUtcTime(2015, 6, 20, 1, 2, 3);
		nhWinterTimeMillis = createUtcTime(2015, 1, 20, 1, 2, 3);

		expectedResult = new CountryResult("Europe/Berlin", false /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */, nhSummerTimeMillis);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("de", NH_WINTER_TIME_MILLIS));
		mTimeZoneLookupHelper.lookupByCountry("de", nhSummerTimeMillis));
		expectedResult = new CountryResult("Europe/Berlin", false /* multipleZonesInCountry */,
		true /* allZonesHaveSameOffset */, nhWinterTimeMillis);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("de", nhWinterTimeMillis));
		}

		@Test
		public void testLookupByCountry_multipleZones() {
		CountryResult expectedResult;

		// US has many time zones that have different offsets.
		expectedResult = new CountryResult("America/New_York", false /* allZonesHaveSameOffset */,
		NH_SUMMER_TIME_MILLIS);
		expectedResult = new CountryResult("America/New_York", true /* multipleZonesInCountry */,
		false /* allZonesHaveSameOffset */, NH_SUMMER_TIME_MILLIS);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("us", NH_SUMMER_TIME_MILLIS));
		expectedResult = new CountryResult("America/New_York", false /* allZonesHaveSameOffset */,
		NH_WINTER_TIME_MILLIS);
		expectedResult = new CountryResult("America/New_York", true /* multipleZonesInCountry */,
		false /* allZonesHaveSameOffset */, NH_WINTER_TIME_MILLIS);
		assertEquals(expectedResult,
		mTimeZoneLookupHelper.lookupByCountry("us", NH_WINTER_TIME_MILLIS));
		}