Hi all,
today, I stubble on a variant of JDK-8050818 [1],
trying to call negate() on a lambda which is not yet a Predicate (due to
target typing) which requires either to cast the lambda to a Predicate
and everybody knows that cast are evil or to add a local variable.
I think there is a way to fix that, it's not very orthodox so I let you
judge.
The idea is to introduce a static method 'of' on Predicate,
class Predicate<T> {
...
public static <T> Predicate<T> of(Predicate<T> predicate) {
return predicate;
}
}
so one can write:
stream.filter(Predicate.of(String::isEmpty).negate())
compared to
stream.filter(((Predicate<String>)String::isEmpty).negate())
so the question is, does it it worth the cost to introduce a static
method that basically do nothing on all functional interfaces of
java.util.function.
cheers,
Rémi
[1] https://bugs.openjdk.java.net/browse/JDK-8050818
