Stream.toArray()

[Brian Goetz]

Agree on the general form -- toArray(clazz) is definitely better than 
the current bad alternatives offered by Collection.

I prefer that the argument be the component class, not the array class. 
  I think toArray(Foo.class) is far more natural to users than 
toArray(Foo[].class).

On 12/5/2012 10:33 AM, Remi Forax wrote:
> Restarting a thread that ends without clear winner.
>
> Currently, Stream.toArray() is specified as:
>    Object[] toArray()
>
> which is not what users want, given the lack of reified generics and the
> fact that it's usually hard for a user to predict the number of elements
> of a Stream,
> the best signature seems to be:
>    <A> A[] toArray(Class<A> arrayClass)
> with arrayClass.isArray() returning true and
> arrayClass.getComponentType().isPrimitive() returning false
> (or if you prefer Object[].class.isAssignableFrom(arrayClass) returning
> true)
>
> example of usage,
>    Person[] coolPersons =
> persons.stream().filter(person#isCool()).toArray(Person[].class);
>
> cheers,
> Rémi
>