Streams returned by flat-mappers (parallel, unordered) (original) (raw)

Georgiy Rakov georgiy.rakov at oracle.com
Fri Apr 12 10:08:42 PDT 2013

Hello,

according to b85 all the flatMap-methods accept mappers returning stream instances (Function<T, Stream >, IntFunction, etc.).

I wonder if spec will specify any recommendations regarding what kinds of streams user should or should not return from flat-mappers. For instance:

"If called stream is supposed to be executed in parallel then
flat-mapper should return parallel streams or streams which could be
converted to those by calling its parallel() method; otherwise the
streams returned by flat-mapper will be executed sequentially."

Recommendations regarding unordered streams also seem to be interesting.

Thanks, Georgiy.

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