Collectors update

[Remi Forax]

On 01/29/2013 11:34 PM, Brian Goetz wrote:
> I've done some refactoring in Collectors to address some issues, 
> including approachability issues that were raised by Kevin.  See if 
> you like them.

>
> 4.  Rejigger Partition to return an array again, with an explicit 
> lambda (which will likely be an array ctor ref) to make the array.  
> Eliminated the silly Partition class.

Please don't do that, it's pure evil.
   public static<T> Collector<T, Collection<T>[]> 
partitioningBy(Predicate<T> predicate, IntFunction<Collection<T>[]> 
arraySupplier) {

in order to call this method users have to send a lambda that creates an 
array of parametrized type something which will be unsafe (the only way 
to get type safety is to create a class that inherits from Collection 
and to provide a type argument something like class Foo extends 
ArrayList<String> {}) so while the code of the library is typesafe, no 
user code will never be typesafe.

and BTW, the IntFunction will be always called with 2 as argument.

Rémi