private IStreamObserver <Empty, TInput> GetPipe(IStreamObserver <Empty, TResult> observer)
{
var lookupKey = CacheKey.Create(this.KeySelector.ExpressionToCSharp(), this.ResultSelector.ExpressionToCSharp());
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => GroupedWindowTemplate.Generate(this));
Func <PlanNode, IQueryObject, PlanNode> planNode = ((PlanNode p, IQueryObject o) => new GroupedWindowPlanNode <TInput, TState, TOutput>(
p, o, typeof(TKey), typeof(TInput), typeof(TOutput), this.Aggregate, this.KeySelector, this.ResultSelector,
true, generatedPipeType.Item2, false));
var instance = Activator.CreateInstance(generatedPipeType.Item1, this, observer, this.Aggregate, planNode);
var returnValue = (IStreamObserver <Empty, TInput>)instance;
return(returnValue);
}
protected override bool CanGenerateColumnar()
{
var typeOfTKey = typeof(TKey);
var typeOfTInput = typeof(TInput);
if (!typeOfTInput.CanRepresentAsColumnar())
{
return(false);
}
if (typeOfTKey.GetPartitionType() != null)
{
return(false);
}
var lookupKey = CacheKey.Create(this.KeySelector.ExpressionToCSharp(), this.ResultSelector.ExpressionToCSharp());
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => GroupedWindowTemplate.Generate(this));
this.errorMessages = generatedPipeType.Item2;
return(generatedPipeType.Item1 != null);
}