On Feb 12, 2015, at 3:33 PM, Chris Hegarty <chris.hega...@oracle.com> wrote:
> On 3 Feb 2015, at 13:48, Paul Sandoz <paul.san...@oracle.com> wrote: > >> Hi, >> >> http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8071600-Collector-flatMapping/webrev/ > > Looks like a useful addition. > Thanks. > Trivially, the handling of null caught my eye: "If a mapped stream is {@code > null} an empty stream is used, instead.” It looks like the result of the > mapper function returning null is equivalent to it returning an empty stream, > but I’m not sure that I see an empty stream being used in the implementation. Right, and the caller cannot tell the difference, since in either case no elements will be pushed downstream. > Is this just a convenience, for implementers of the mapping function? > Yes, the sentence makes most sense in the context of what comes before it. Paul.
