Hi,
instanceof has been refitted to include an auto-cast ("pattern matching on
instanceof"). Unfortunately, doing this as an intermediate operation on a
stream requires first to filter via instanceof and then map via a cast.
This is because
x instanceof MyClass myClass
returns a boolean, not myClass.
I've asked for an easier way of doing it long ago directly on Stream and
was declined, but now with Gatherers I'm bringing this up again. I think it
would be reasonable to put such an operation in the Gatherers class. I
imagine that many Gatherer libraries, or utility classes, will include it
since it's a common operation, and having it in the JDK means that it'll be
done the best way possible (you can optimize where others can't, if
applicable here).
-- Nir
