Are multiple iterators ever needed to be requested from it?
I'm kind of tempted to do
Flow.<Iterator<T>>create().mapConcat(iter -> new Iterable<T>() {
@Override
public Iterator<T> iterator()
{
return iter;
}}).grouped(chunkSize).map(list -> list.iterator())
That’s what “multiple materializations of the same stream pipeline” are, so
yes.
If returning the same iterator is what you want there then feel free to do
so; It means though that if you start 2 streams using a part of that
mapConcat would end up accessing the same iterator potentially concurrently.
— Konrad
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