Possible JSR-310 (date/time API) stream methods
brian.goetz at oracle.com
Fri Mar 8 08:04:23 PST 2013
> If a user needs an Iterable, it's not too much trouble either
> Iterable<A> iterable = ()->source.stream().iterator();
While this satisfies the type system, it is asking for trouble. Users
routinely assume Iterable means "can be iterated repeatedly." This is a
pretty crippled Iterable.
> That should cover all legacy usages that interface with
> Iterable/Iterator. So I agree that new APIs can forget about
Still, I agree with this conclusion. Returning Iterator/Iterable as a
LCD is nearly always the wrong thing.
If you know the caller needs a reified aggregate, return a Collection.
If you think the caller merely needs access to the elements, return a
Stream, with the best Spliterator you can give it.
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