/// <summary>
/// Returns a list of Dates that are the next fire times of a <see cref="Trigger" />
/// that fall within the given date range. The input trigger will be cloned
/// before any work is done, so you need not worry about its state being
/// altered by this method.
/// <p>
/// NOTE: if this is a trigger that has previously fired within the given
/// date range, then firings which have already occured will not be listed
/// in the output List.
/// </p>
/// </summary>
/// <param name="trigg">The trigger upon which to do the work</param>
/// <param name="cal">The calendar to apply to the trigger's schedule</param>
/// <param name="from">The starting date at which to find fire times</param>
/// <param name="to">The ending date at which to stop finding fire times</param>
/// <returns>List of java.util.Date objects</returns>
public static IList ComputeFireTimesBetween(Trigger trigg, ICalendar cal, DateTime from, DateTime to)
{
ArrayList lst = new ArrayList();
Trigger t = (Trigger) trigg.Clone();
if (t.GetNextFireTimeUtc() == null || !t.GetNextFireTimeUtc().HasValue)
{
t.StartTimeUtc = from;
t.EndTimeUtc = to;
t.ComputeFirstFireTimeUtc(cal);
}
// TODO: this method could be more efficient by using logic specific
// to the type of trigger ...
while (true)
{
NullableDateTime d = t.GetNextFireTimeUtc();
if (d.HasValue)
{
if (d.Value < from)
{
t.Triggered(cal);
continue;
}
if (d.Value > to)
{
break;
}
lst.Add(d);
t.Triggered(cal);
}
else
{
break;
}
}
return ArrayList.ReadOnly(new ArrayList(lst));
}
/// <summary>
/// Returns a list of Dates that are the next fire times of a
/// <see cref="Trigger" />.
/// The input trigger will be cloned before any work is done, so you need
/// not worry about its state being altered by this method.
/// </summary>
/// <param name="trigg">The trigger upon which to do the work</param>
/// <param name="cal">The calendar to apply to the trigger's schedule</param>
/// <param name="numTimes">The number of next fire times to produce</param>
/// <returns>List of java.util.Date objects</returns>
public static IList ComputeFireTimes(Trigger trigg, ICalendar cal, int numTimes)
{
ArrayList lst = new ArrayList();
Trigger t = (Trigger) trigg.Clone();
if (t.GetNextFireTimeUtc() == null || !t.GetNextFireTimeUtc().HasValue)
{
t.ComputeFirstFireTimeUtc(cal);
}
for (int i = 0; i < numTimes; i++)
{
NullableDateTime d = t.GetNextFireTimeUtc();
if (d.HasValue)
{
lst.Add(d);
t.Triggered(cal);
}
else
{
break;
}
}
return ArrayList.ReadOnly(new ArrayList(lst));
}