RFR(XS) : JDK-8008687 - MethodHandle code: allow static and invokespecial calls to interface methods

[John Rose]

On Apr 19, 2013, at 9:41 AM, Bharadwaj Yadavalli <bharadwaj.yadavalli at oracle.com> wrote:

> I would like to request for a review of code changes made to support lambda related modifications to allow static and invokespecial calls to interface methods per spec version 0.6.2 (http://cr.openjdk.java.net/~dlsmith/jsr335-0.6.2.html). These changes support an upcoming change that compiles lambdas as private static methods in conjunction with hotspot changes pushed to address JDK-8006267.
> 
> JBS        : https://jbs.oracle.com/bugs/browse/JDK-8008687
> Webrev : http://cr.openjdk.java.net/~bharadwaj/8008687/webrev/

Looks good as far as it goes (to allow private lambda bodies to be accessed from interfaces).  But more work is needed to align the java.lang.invoke APIs with the new class file rules.

In your code, I think the case 'refKind == REF_invokeSpecial' is missing.  The draft JVMS implies REF_invokeSpecial is also allowed, since an interface method can be any of {public,private}+{static,non-static}.  We should have unit tests for findStatic and findSpecial of interface methods.  (Also unreflect and unreflectSpecial.)

But it is a step forward.  You can count me as a reviewer.  Please consider filing a followup bug to support the other new interface method kinds.

— John