Examples with CountryTimeZones android.timezone.CountryTimeZones used on opensource projects

Example 1 with CountryTimeZones

use of android.timezone.CountryTimeZones in project android_frameworks_opt_telephony by LineageOS.

the class TimeZoneLookupHelper method lookupByCountry.

/**
 * Returns information about the time zones used in a country at a given time.
 *
 * {@code null} can be returned if a problem occurs during lookup, e.g. if the country code is
 * unrecognized, if the country is uninhabited, or if there is a problem with the data.
 */
@VisibleForTesting
@Nullable
public CountryResult lookupByCountry(@NonNull String isoCountryCode, long whenMillis) {
    CountryTimeZones countryTimeZones = getCountryTimeZones(isoCountryCode);
    if (countryTimeZones == null) {
        // Unknown country code.
        return null;
    }
    TimeZone countryDefaultZone = countryTimeZones.getDefaultTimeZone();
    if (countryDefaultZone == null) {
        // This is not expected: the country default should have been validated before.
        return null;
    }
    String debugInfo;
    int matchQuality;
    if (countryTimeZones.isDefaultTimeZoneBoosted()) {
        matchQuality = CountryResult.QUALITY_DEFAULT_BOOSTED;
        debugInfo = "Country default is boosted";
    } else {
        List<TimeZoneMapping> effectiveTimeZoneMappings = countryTimeZones.getEffectiveTimeZoneMappingsAt(whenMillis);
        if (effectiveTimeZoneMappings.isEmpty()) {
            // This should never happen unless there's been an error loading the data.
            // Treat it the same as a low quality answer.
            matchQuality = QUALITY_MULTIPLE_ZONES_DIFFERENT_OFFSETS;
            debugInfo = "No effective time zones found at whenMillis=" + whenMillis;
        } else if (effectiveTimeZoneMappings.size() == 1) {
            // The default is the only zone so it's a good candidate.
            matchQuality = CountryResult.QUALITY_SINGLE_ZONE;
            debugInfo = "One effective time zone found at whenMillis=" + whenMillis;
        } else {
            boolean countryUsesDifferentOffsets = countryUsesDifferentOffsets(whenMillis, effectiveTimeZoneMappings, countryDefaultZone);
            matchQuality = countryUsesDifferentOffsets ? QUALITY_MULTIPLE_ZONES_DIFFERENT_OFFSETS : QUALITY_MULTIPLE_ZONES_SAME_OFFSET;
            debugInfo = "countryUsesDifferentOffsets=" + countryUsesDifferentOffsets + " at" + " whenMillis=" + whenMillis;
        }
    }
    return new CountryResult(countryDefaultZone.getID(), matchQuality, debugInfo);
}

Example 2 with CountryTimeZones

use of android.timezone.CountryTimeZones in project android_frameworks_opt_telephony by LineageOS.

the class TimeZoneLookupHelper method lookupByNitzCountry.

/**
 * Looks for a time zone for the supplied NITZ and country information.
 *
 * <p><em>Note:</em> When there are multiple matching zones then one of the matching candidates
 * will be returned in the result. If the current device default zone matches it will be
 * returned in preference to other candidates. This method can return {@code null} if no
 * matching time zones are found.
 */
@VisibleForTesting
@Nullable
public OffsetResult lookupByNitzCountry(@NonNull NitzData nitzData, @NonNull String isoCountryCode) {
    CountryTimeZones countryTimeZones = getCountryTimeZones(isoCountryCode);
    if (countryTimeZones == null) {
        return null;
    }
    TimeZone bias = TimeZone.getDefault();
    // Android NITZ time zone matching doesn't try to do a precise match using the DST offset
    // supplied by the carrier. It only considers whether or not the carrier suggests local time
    // is DST (if known). NITZ is limited in only being able to express DST offsets in whole
    // hours and the DST info is optional.
    Integer dstAdjustmentMillis = nitzData.getDstAdjustmentMillis();
    if (dstAdjustmentMillis == null) {
        return countryTimeZones.lookupByOffsetWithBias(nitzData.getCurrentTimeInMillis(), bias, nitzData.getLocalOffsetMillis());
    } else {
        // We don't try to match the exact DST offset given, we just use it to work out if
        // the country is in DST.
        boolean isDst = dstAdjustmentMillis != 0;
        return countryTimeZones.lookupByOffsetWithBias(nitzData.getCurrentTimeInMillis(), bias, nitzData.getLocalOffsetMillis(), isDst);
    }
}