/// <summary>
/// Create the first (or only) TimeSlice in a sequence.
/// </summary>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="inc"></param>
/// <returns></returns>
public static TimeSlice CreateInitial(DateTime from, DateTime to, double inc)
{
TimeSlice retval = null;
bool incomplete = false;
DateTime later;
if (from > to)
{
later = from;
if (inc > 0.0)
{
long intMillis = MillisecondsToTicks(inc);
long totMillis = MillisecondsToTicks((from - to).TotalMilliseconds);
long remMillis = totMillis % intMillis;
later = (remMillis > 0) ? to + new TimeSpan(remMillis) : to + new TimeSpan(intMillis);
incomplete = (remMillis > 0);
}
retval = new BackwardTimeSlice
{
From = later,
To = to,
Incomplete = incomplete,
EarlyBound = new BoundingValue { Timestamp = to },
LateBound = new BoundingValue { Timestamp = later }
};
}
else if (to > from)
{
later = to;
if (inc > 0.0)
{
later = from + new TimeSpan(MillisecondsToTicks(inc));
if (later > to)
{
later = to;
incomplete = true;
}
}
retval = new ForwardTimeSlice
{
From = from,
To = later,
Incomplete = incomplete,
EarlyBound = new BoundingValue { Timestamp = from },
LateBound = new BoundingValue { Timestamp = later }
};
}
//deliberately ignore (if from == to)
return retval;
}
/// <summary>
/// Create the TimeSlice that immediately follows this one in time.
/// </summary>
/// <param name="latest"></param>
/// <param name="inc"></param>
/// <returns></returns>
protected override TimeSlice CreateSuccessor(DateTime latest, double inc)
{
TimeSlice retval = null;
if (To < latest)
{
bool incomplete = false;
DateTime target = To + new TimeSpan(MillisecondsToTicks(inc));
if (target > latest)
{
target = latest;
incomplete = true;
}
retval = new ForwardTimeSlice
{
From = this.To,
To = target,
Incomplete = incomplete,
EarlyBound = this.LateBound,
LateBound = new BoundingValue { Timestamp = target }
};
}
return retval;
}