public void EnumerateDifferenceAt(int offsetLength, int timeIndex, NaiadList <Weighted <S> > toFill)
{
if (toFill.Count == 0)
{
var temp = new OffsetLength(offsetLength);
var accum = new CollectionTraceWithAggregationIncrement <S>();
var handle = increments.Dereference(temp);
for (int i = 0; i < handle.Length && !handle.Array[handle.Offset + i].IsEmpty(isZero); i++)
{
if (handle.Array[handle.Offset + i].TimeIndex == timeIndex)
{
accum.Add(handle.Array[handle.Offset + i], axpy);
}
}
if (!accum.IsEmpty(isZero))
{
toFill.Add(new Weighted <S>(accum.Value, 1));
}
}
else
{
throw new NotImplementedException();
}
}
// no caching at the moment; should do, but need to figure out how...
CollectionTraceWithAggregationIncrement <S> UpdateAccumulation(ref OffsetLength ol, int timeIndex)
{
#if true
if (ol.IsEmpty)
{
return(new CollectionTraceWithAggregationIncrement <S>(timeIndex));
}
var handle = increments.Dereference(ol);
// special-case single element accumulations to avoid unprocessed accumulation dropping processed accumulation
if (handle.Length == 1)
{
if (TimeLessThan(handle.Array[handle.Offset].TimeIndex, timeIndex))
{
return(handle.Array[handle.Offset]);
}
else
{
return(new CollectionTraceWithAggregationIncrement <S>(timeIndex));
}
}
else
#else
var handle = increments.Dereference(ol);
#endif
{
// if we have a hit on the cache ...
if (ol.offsetLength == cachedIncrementOffset.offsetLength)
{
for (int i = 0; i < handle.Length && !handle.Array[handle.Offset + i].IsEmpty(isZero); i++)
{
if (!handle.Array[handle.Offset + i].IsEmpty(isZero))
{
var inNew = TimeLessThan(handle.Array[handle.Offset + i].TimeIndex, timeIndex);
var inOld = TimeLessThan(handle.Array[handle.Offset + i].TimeIndex, cacheContents.TimeIndex);
if (inOld != inNew)
{
cacheContents.Add(handle.Array[handle.Offset + i], axpy, inOld ? -1 : +1);
}
}
}
cacheContents.TimeIndex = timeIndex;
}
else
{
ReleaseCache(); // blow cache away and start over
for (int i = 0; i < handle.Length && !handle.Array[handle.Offset + i].IsEmpty(isZero); i++)
{
if (TimeLessThan(handle.Array[handle.Offset + i].TimeIndex, timeIndex))
{
cacheContents.Add(handle.Array[handle.Offset + i], axpy);
}
}
cachedIncrementOffset = ol;
cacheContents.TimeIndex = timeIndex;
}
return(cacheContents);
}
}
