public PivotCorrelatedStreamNode(string name, PivotCorrelatedArgs <TIn, TAggrRes, TKey> args) : base(name, args)
{
}
protected override IStream <Correlated <AggregationResult <TIn, TKey, TAggrRes> > > CreateOutputStream(PivotCorrelatedArgs <TIn, TAggrRes, TKey> args)
{
var aggregationProcessor = new AggregationProcessor <Correlated <TIn>, TIn, TAggrRes, CorrelatedAggregator <TIn> >(args.AggregationDescriptor);
return(CreateUnsortedStream(
args.InputStream.Observable.Aggregate(
i => aggregationProcessor.CreateAggregators(i),
i => args.GetKey(i.Row),
aggregationProcessor.Aggregate,
(i, k, a) =>
{
HashSet <Guid> correlationKeys = new HashSet <Guid>();
a.Values.Select(i => i.CorrelationKeys).ToList().ForEach(correlationKeys.UnionWith);
return new Correlated <AggregationResult <TIn, TKey, TAggrRes> >
{
Row = new AggregationResult <TIn, TKey, TAggrRes>
{
Aggregation = aggregationProcessor.CreateInstance(a),
FirstValue = i.Row,
Key = k
},
CorrelationKeys = correlationKeys
};
})));
}
