RFR: 8015318: Extend Collector with 'finish' operation

[Henry Jen]

Forgot to mention this patch depends on fix of bug 8012238[1], to enable
compile without fix, attached patch will help.

[1] http://bugs.sun.com/view_bug.do?bug_id=8012238

Cheers,
Henry


On 07/05/2013 05:11 PM, Henry Jen wrote:
> Hi,
> 
> Please review the webrev at
> http://cr.openjdk.java.net/~henryjen/ccc/8015318.0/webrev/
> 
> This webrev refactor java.util.Collector interface to allow an
> intermediate type used for accumulation and then produce final result
> type with a 'finished' function.
> 
> Collectors are updated to reflect the changes, and quite a few API changes,
> 
> toStringJoiner -> joining
> Return type becoming Optional<T> when appropriate
> sumBy -> a set of summing[Int,Long,Double]
> average[Int,Long,Double]
> 
> I'll put specdiff up later for those interested in API changes.
> 
> Cheers,
> Henry
>