/// <summary>
/// Returns an <see cref="Instant"/> that represents the point in the given year that this
/// object defines. If the exact point is not valid then the nearest point that matches the
/// definition is returned.
/// </summary>
/// <param name="year">The year to calculate for.</param>
/// <param name="standardOffset">The standard offset.</param>
/// <param name="savings">The daylight savings adjustment.</param>
/// <returns>The <see cref="Instant"/> of the point in the given year.</returns>
internal Instant MakeInstant(int year, Offset standardOffset, Offset savings)
{
CalendarSystem calendar = CalendarSystem.Iso;
if (year > calendar.MaxYear)
{
return(Instant.MaxValue);
}
if (year < calendar.MinYear)
{
return(Instant.MinValue);
}
LocalDate date = new LocalDate(year, monthOfYear, dayOfMonth > 0 ? dayOfMonth : 1);
if (dayOfMonth < 0)
{
date = date.PlusMonths(1).PlusDays(dayOfMonth);
}
if (dayOfWeek != 0 && dayOfWeek != date.DayOfWeek)
{
IsoDayOfWeek isoDayOfWeek = (IsoDayOfWeek)dayOfWeek;
date = advance ? date.Next(isoDayOfWeek) : date.Previous(isoDayOfWeek);
}
if (addDay)
{
date = date.PlusDays(1);
}
LocalInstant localInstant = (date + timeOfDay).LocalInstant;
Offset offset = GetOffset(standardOffset, savings);
// Convert from local time to UTC.
return(localInstant.Minus(offset));
}
public void MinusOffset_Zero_IsNeutralElement()
{
Instant sampleInstant = new Instant(1, 23456L);
LocalInstant sampleLocalInstant = new LocalInstant(1, 23456L);
Assert.AreEqual(sampleInstant, sampleLocalInstant.Minus(Offset.Zero));
Assert.AreEqual(sampleInstant, sampleLocalInstant.MinusZeroOffset());
}
public void MinusOffset_Zero_IsNeutralElement()
{
Instant sampleInstant = new Instant(1, 23456L);
LocalInstant sampleLocalInstant = new LocalInstant(1, 23456L);
Assert.AreEqual(sampleInstant, sampleLocalInstant.Minus(Offset.Zero));
Assert.AreEqual(sampleInstant, sampleLocalInstant.MinusZeroOffset());
}
public void AtStrictly_InSummer()
{
var when = Pacific.AtStrictly(new LocalDateTime(2009, 6, 22, 21, 39, 30));
Instant instant = when.ToInstant();
LocalInstant localInstant = when.LocalInstant;
Assert.AreEqual(instant, localInstant.Minus(Offset.FromHours(-7)));
Assert.AreEqual(2009, when.Year);
Assert.AreEqual(6, when.Month);
Assert.AreEqual(22, when.Day);
Assert.AreEqual(21, when.Hour);
Assert.AreEqual(39, when.Minute);
Assert.AreEqual(30, when.Second);
}
private ZoneInterval GetIntervalAfterGap(LocalInstant localInstant)
{
Instant guess = new Instant(localInstant.Ticks);
ZoneInterval guessInterval = GetZoneInterval(guess);
// If the local interval occurs before the zone interval we're looking at starts,
// it's the one we're looking for. Otherwise, we need to find the next interval.
if (localInstant.Minus(guessInterval.Offset) < guessInterval.Start)
{
return guessInterval;
}
else
{
return GetZoneInterval(guessInterval.End);
}
}
private ZoneInterval GetIntervalBeforeGap(LocalInstant localInstant)
{
Instant guess = new Instant(localInstant.Ticks);
ZoneInterval guessInterval = GetZoneInterval(guess);
// If the local interval occurs before the zone interval we're looking at start,
// we need to find the earlier one; otherwise this interval must come after the gap, and
// it's therefore the one we want.
if (localInstant.Minus(guessInterval.Offset) < guessInterval.Start)
{
return GetZoneInterval(guessInterval.Start - Duration.One);
}
else
{
return guessInterval;
}
}
