protected override IStream <Correlated <TOut> > CreateOutputStream(WithPreviousCorrelatedArgs <TIn, TOut> args)
{
var obs = args.Stream.Observable
.Scan <Correlated <TIn>, (FixedQueue <Correlated <TIn> > Queue, TIn[] Items, HashSet <Guid> CorrelationKeys)>((new FixedQueue <Correlated <TIn> >(args.Count), new TIn[] { }, new HashSet <Guid>()), (a, v) =>
{
a.Queue.Enqueue(v);
return(
a.Queue,
a.Queue.ToArray().Reverse().Select(i => i.Row).ToArray(),
a.Queue.ToArray().SelectMany(i => i.CorrelationKeys).ToHashSet());
})
.Map(i => new Correlated <TOut>
{
Row = args.GetResult(i.Items),
CorrelationKeys = i.CorrelationKeys
});
return(base.CreateUnsortedStream(obs));
}
public WithPreviousCorrelatedStreamNode(string name, WithPreviousCorrelatedArgs <TIn, TOut> args) : base(name, args)
{
}
