> On 20 Jul 2016, at 20:13, Paul Benedict <pbened...@apache.org> wrote: > > Yes, that's my concern, but it's really only secondary to something else. I > am more concerned that specifying both seems redundant. The JVM should be > able to infer at resolution time that what's not exported is concealed. > There may be a grander design at play which I yet to understand, but I > don't see how specifying what's concealed adds more information to the mix > than you already have.
Concealed Packages are just a performance optimization, nothing more. If the ConcealedPackages attribute is present then it should contain all the non-exported packages of the module. The ConcealedPackages attribute, if present, can be used by a class loader implementation to quickly determine, along with the exports, what packages are contained within a module. If the ConcealedPackages attribute is not present then the module artifact will have to be scanned to determine the set of packages it contains. -Chris.
