/// <summary>
/// Outputs debug information about observations and calls any registered event
/// handlers.
/// </summary>
/// <param name="continuousObservations">
/// Each item will be passed to <see cref="Debug.WriteLine(object)"/>.
/// </param>
/// <returns>An empty set of aggregated data points.</returns>
public IEnumerable<AggregatedDataPoint> Aggregate(
ConsecutiveDataPointObservationsCollection continuousObservations)
{
Debug.WriteLine("Enter: SampleDataPointAggregator.Aggregate");
if (continuousObservations == null)
{
throw new ArgumentNullException("continuousObservations");
}
Debug.WriteLine(string.Join(" ", continuousObservations.ToArray()));
IEnumerable<AggregatedDataPoint> result = this.callback(continuousObservations);
Debug.WriteLine("Success: SampleDataPointAggregator.Aggregate");
return result;
}
/// <inheritdoc />
public IEnumerable<AggregatedDataPoint> Aggregate(ConsecutiveDataPointObservationsCollection continuousObservations)
{
IEnumerable<DataPointObservation> remainingPoints = continuousObservations;
while (remainingPoints.Any())
{
DateTime aggregateUtcTime = TruncateToSecondsUtc(remainingPoints.First().UtcTimestamp);
Func<DataPointObservation, bool> inAggregationWindow =
p => TruncateToSecondsUtc(p.UtcTimestamp).Ticks == aggregateUtcTime.Ticks;
IEnumerable<DataPointObservation> pointsUnderConsideration = remainingPoints.TakeWhile(inAggregationWindow);
remainingPoints = remainingPoints.SkipWhile(inAggregationWindow);
yield return new AggregatedDataPoint()
{
UtcTimestamp = aggregateUtcTime,
AggregatedValue = pointsUnderConsideration.Average(p => p.Value),
};
}
yield break;
}
