Round 1 feedback

[Michael Nascimento]

On Wed, Jan 9, 2013 at 2:13 PM, Brian Goetz <brian.goetz at oracle.com> wrote:
> What we did in 8 is add {Map,ConcurrentMap}.computeIfAbsent.  This
> eliminates 80% of the pain of simulating a multimap with a
> Map<K,Collection<V>>.  To wit:
>
> void add(K k, V v) {
>   map.computeIfAbsent(k, ArrayList::new).add(v);
> }
>
> This is only slightly worse than
>   multimap.add(k, v);
>
> and certainly way less pain than doing it today.
>
> With this tweak, I think the argument in favor of adding Multimap to the JDK
> loses about 80% of its steam.

Ok, now to a different point of the Multimap discussion. Turning this:

Collection<Foo<Bar>> values = fooBySomething.values();

into this:

Collection<Foo<Bar>> values =
fooBySomething.values().stream().<Foo<Bar>>explode((d, foos) ->
d.send(foos)).collectUnordered(toList());

is pretty ugly, isn't it? Or is there a better way?

Regards,
Michael