JDK 16 RFR of JDK-8250660: Clarify that WildcardType and AnnotatedWildcardType bounds methods return one

Joe Darcy joe.darcy at oracle.com
Wed Aug 5 21:37:05 UTC 2020


Addressing some feedback from off-list discussions with Mandy, I propose 
changing the API notes to:

     @apiNote While to date a wildcard may have at most one upper[lower] 
bound, callers of this method should be written to accommodate multiple 



On 8/3/2020 9:24 AM, Joe Darcy wrote:
> Hi David,
> To provide a bit more context, the API was consciously designed to be 
> future-proofed against the possibility of Java supporting multiple 
> bounds here (JDK-4891872). As of yet, that change has not come to 
> pass, and as you note may never come to pass. So besides in addition 
> to the links into the JLS, I think it is reasonable to include an API 
> note acknowledging the situation. How about:
>     This method supports the existence of multiple bounds, but to 
> date, a wildcard may have at most one upper/lower bound.
> -Joe

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