/// <summary>
/// Retrieves the recurrence, after applying the specified name format.
/// </summary>
/// <remarks>
/// Multiple zones may apply the same set of rules as to when they change into/out of
/// daylight saving time, but with different names.
/// </remarks>
/// <param name="zone">The zone for which this rule is being considered.</param>
public IEnumerable <ZoneRecurrence> GetRecurrences(ZoneLine zone)
{
string name = zone.FormatName(recurrence.Savings, daylightSavingsIndicator);
if (Type == null)
{
yield return(recurrence.WithName(name));
}
else
{
Predicate <int> yearPredicate = GetYearPredicate();
// Apply a little sanity...
if (recurrence.IsInfinite || recurrence.ToYear - recurrence.FromYear > 1000)
{
throw new NotSupportedException("Noda Time does not support 'typed' rules over large periods");
}
for (int year = recurrence.FromYear; year <= recurrence.ToYear; year++)
{
if (yearPredicate(year))
{
yield return(recurrence.ForSingleYear(year).WithName(name));
}
}
}
}
public void ForSingleYear()
{
var yearOffset = new ZoneYearOffset(TransitionMode.Utc, 10, 31, (int)IsoDayOfWeek.Wednesday, true, LocalTime.Midnight);
var original = new ZoneRecurrence("original", Offset.FromHours(1), yearOffset, 1900, 2000);
var singleYear = original.ForSingleYear(2017);
Assert.AreEqual(original.Name, singleYear.Name);
Assert.AreEqual(original.Savings, singleYear.Savings);
Assert.AreEqual(original.YearOffset, singleYear.YearOffset);
Assert.AreEqual(2017, singleYear.FromYear);
Assert.AreEqual(2017, singleYear.ToYear);
}
