/// <summary>
/// Reads an <see cref="DateTimeZone" /> value from the stream.
/// </summary>
/// <remarks>
/// The value must have been written by <see cref="LegacyDateTimeZoneWriter.WriteTimeZone" />.
/// </remarks>
/// <returns>The <see cref="DateTimeZone" /> value from the stream.</returns>
public DateTimeZone ReadTimeZone(string id)
{
int flag = ReadByte();
switch (flag)
{
case LegacyDateTimeZoneWriter.FlagTimeZoneFixed:
return(FixedDateTimeZone.Read(this, id));
case LegacyDateTimeZoneWriter.FlagTimeZonePrecalculated:
return(PrecalculatedDateTimeZone.ReadLegacy(this, id));
case LegacyDateTimeZoneWriter.FlagTimeZoneNull:
return(null); // Only used when reading a tail zone
case LegacyDateTimeZoneWriter.FlagTimeZoneCached:
return(CachedDateTimeZone.ReadLegacy(this, id));
case LegacyDateTimeZoneWriter.FlagTimeZoneDst:
return(DaylightSavingsDateTimeZone.ReadLegacy(this, id));
default:
throw new InvalidNodaDataException("Unknown time zone flag type: " + flag);
}
}
public void Extremes()
{
ZoneRecurrence winter = new ZoneRecurrence("Winter", Offset.Zero,
new ZoneYearOffset(TransitionMode.Wall, 10, 5, 0, false, new LocalTime(2, 0)), int.MinValue, int.MaxValue);
ZoneRecurrence summer = new ZoneRecurrence("Summer", Offset.FromHours(1),
new ZoneYearOffset(TransitionMode.Wall, 3, 10, 0, false, new LocalTime(1, 0)), int.MinValue, int.MaxValue);
var zone = new DaylightSavingsDateTimeZone("infinite", Offset.Zero, winter, summer);
var firstSpring = Instant.FromUtc(-9998, 3, 10, 1, 0);
var firstAutumn = Instant.FromUtc(-9998, 10, 5, 1, 0); // 1am UTC = 2am wall
var lastSpring = Instant.FromUtc(9999, 3, 10, 1, 0);
var lastAutumn = Instant.FromUtc(9999, 10, 5, 1, 0); // 1am UTC = 2am wall
var dstOffset = Offset.FromHours(1);
// Check both year -9998 and 9999, both the infinite interval and the next one in
var firstWinter = new ZoneInterval("Winter", Instant.BeforeMinValue, firstSpring, Offset.Zero, Offset.Zero);
var firstSummer = new ZoneInterval("Summer", firstSpring, firstAutumn, dstOffset, dstOffset);
var lastSummer = new ZoneInterval("Summer", lastSpring, lastAutumn, dstOffset, dstOffset);
var lastWinter = new ZoneInterval("Winter", lastAutumn, Instant.AfterMaxValue, Offset.Zero, Offset.Zero);
Assert.AreEqual(firstWinter, zone.GetZoneInterval(Instant.MinValue));
Assert.AreEqual(firstWinter, zone.GetZoneInterval(Instant.FromUtc(-9998, 2, 1, 0, 0)));
Assert.AreEqual(firstSummer, zone.GetZoneInterval(firstSpring));
Assert.AreEqual(firstSummer, zone.GetZoneInterval(Instant.FromUtc(-9998, 5, 1, 0, 0)));
Assert.AreEqual(lastSummer, zone.GetZoneInterval(lastSpring));
Assert.AreEqual(lastSummer, zone.GetZoneInterval(Instant.FromUtc(9999, 5, 1, 0, 0)));
Assert.AreEqual(lastWinter, zone.GetZoneInterval(lastAutumn));
Assert.AreEqual(lastWinter, zone.GetZoneInterval(Instant.FromUtc(9999, 11, 1, 0, 0)));
Assert.AreEqual(lastWinter, zone.GetZoneInterval(Instant.MaxValue));
// And just for kicks, let's check we can get them all with GetZoneIntervals.
IEnumerable <ZoneInterval> intervals = zone.GetZoneIntervals(new Interval(null, null)).ToList();
Assert.AreEqual(firstWinter, intervals.First());
Assert.AreEqual(firstSummer, intervals.Skip(1).First());
Assert.AreEqual(lastSummer, intervals.Reverse().Skip(1).First());
Assert.AreEqual(lastWinter, intervals.Last());
}
