+1
This restriction probably dates back to the days of JSF 1.0/1.1 and Java SE 1.4 before java.util.Collection had type enforcement via generics.
> On Jun 13, 2016, at 3:04 AM, arjan tijms <arjan.tijms_at_gmail.com> wrote:
>
> Hi,
>
> +1
>
> No objection, sounds like a good idea. Especially since MyFaces implemented it already I almost assume a default +1 by them (but would be good to see it explicitly here ;)).
>
> Kind regards,
> Arjan Tijms
>
>
> On Sat, Jun 11, 2016 at 9:56 AM, Bauke Scholtz <balusc_at_gmail.com> wrote:
> Hi,
>
> See https://java.net/jira/browse/JAVASERVERFACES_SPEC_PUBLIC-1422.
>
> Currently, http://docs.oracle.com/javaee/7/api/javax/faces/component/UISelectMany.html states that it won't make any attempt to obtain the converter when the value is of type java.util.Collection.
> It is technically however possible to obtain it anyway by inspecting the first non-null select item. MyFaces has this already implemented and I find it's a good idea to improve the spec accordingly.
> This should save the effort of explicitly declaring the converter by name and rely on forClass.
> If there are no objections, I will take care of it for 2.3.
> Cheers, B
>