hg: lambda/lambda/jdk: 8009736: Comparator to allow narrowing type on combinator APIs

[Henry Jen]

On Mar 11, 2013, at 10:33 AM, Dan Smith <daniel.smith at oracle.com> wrote:

> To be consistent, Comparators.reverseOrder should be changed to match (thus avoiding an unchecked cast).  	Don't know what our compatibility policies are for existing generic methods, though…
> 

I would like to do that, but I am not sure if it's an acceptable change if we make it in Collections.reverseOrder().

Another possibility is to have a separate implementation in the new API?

Cheers,
Henry

> —Dan
> 
> On Mar 9, 2013, at 11:27 PM, henry.jen at oracle.com wrote:
> 
>> Changeset: fb7b7275d220
>> Author:    henryjen
>> Date:      2013-03-08 21:54 -0800
>> URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/fb7b7275d220
>> 
>> 8009736: Comparator to allow narrowing type on combinator APIs
>> Reviewed-by:
>> Summary: Allow to narrow return type, add javadoc return tag
>> Allow key extract not limited to Comparable, but use a Comparator of key type.
>> 
>> ! src/share/classes/java/util/Comparator.java
>> ! src/share/classes/java/util/Comparators.java
>> 
>> 
>