Merge "Move isDefaultOkForCountryTimeZoneDetection" (e0efd704) · Commits · e / os / android_frameworks_opt_telephony

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

+50 −4

Original line number	Diff line number	Diff line
		@@ -20,9 +20,11 @@ import android.icu.util.TimeZone;
		import android.text.TextUtils;

		import libcore.timezone.CountryTimeZones;
		import libcore.timezone.CountryTimeZones.TimeZoneMapping;
		import libcore.timezone.TimeZoneFinder;

		import java.util.Date;
		import java.util.List;
		import java.util.Objects;

		/**
		@@ -225,11 +227,55 @@ public class TimeZoneLookupHelper {
		return null;
		}

		List<TimeZoneMapping> effectiveTimeZoneMappings =
		countryTimeZones.getEffectiveTimeZoneMappingsAt(whenMillis);
		boolean multipleZonesInCountry = effectiveTimeZoneMappings.size() > 1;
		boolean defaultOkForCountryTimeZoneDetection = isDefaultOkForCountryTimeZoneDetection(
		countryTimeZones.getDefaultTimeZone(), effectiveTimeZoneMappings, whenMillis);
		return new CountryResult(
		countryTimeZones.getDefaultTimeZoneId(),
		countryTimeZones.getEffectiveTimeZoneMappingsAt(whenMillis).size() > 1,
		countryTimeZones.isDefaultOkForCountryTimeZoneDetection(whenMillis),
		whenMillis);
		countryTimeZones.getDefaultTimeZoneId(), multipleZonesInCountry,
		defaultOkForCountryTimeZoneDetection, whenMillis);
		}

		/**
		* Returns {@code true} if the default time zone for the country is either the only zone used or
		* if it has the same offsets as all other zones used by the country <em>at the specified time
		* </em> making the default equivalent to all other zones used by the country <em>at that time
		* </em>.
		*/
		private static boolean isDefaultOkForCountryTimeZoneDetection(
		TimeZone countryDefault, List<TimeZoneMapping> timeZoneMappings, long whenMillis) {
		if (timeZoneMappings.isEmpty()) {
		// Should never happen unless there's been an error loading the data.
		return false;
		} else if (timeZoneMappings.size() == 1) {
		// The default is the only zone so it's a good candidate.
		return true;
		} else {
		if (countryDefault == null) {
		return false;
		}

		String countryDefaultId = countryDefault.getID();
		int countryDefaultOffset = countryDefault.getOffset(whenMillis);
		for (TimeZoneMapping timeZoneMapping : timeZoneMappings) {
		if (timeZoneMapping.timeZoneId.equals(countryDefaultId)) {
		continue;
		}

		TimeZone timeZone = timeZoneMapping.getTimeZone();
		if (timeZone == null) {
		continue;
		}

		int candidateOffset = timeZone.getOffset(whenMillis);
		if (countryDefaultOffset != candidateOffset) {
		// Multiple different offsets means the default should not be used.
		return false;
		}
		}
		return true;
		}
		}

		/**