RFR: 8237878: Improve ModuleLoaderMap datastructures

[Alan Bateman]

On 10/02/2020 09:04, Claes Redestad wrote:
> :
>
> So how about:
> http://cr.openjdk.java.net/~redestad/8237878/open.02/

Thanks for restoring the use of Function<String, ClassLoader>. Changing 
Module::defineClass to invoke a method on ModuleLoaderMap is okay but 
the method needs to something like "isBuiltinMapper" because it tests if 
the function is a built-in mapper used for the boot layer (or child 
layers created when we need to dynamically augment the set of platform 
modules).

Minor nit but I think the comment on the Mapper constructor would say 
that it creates a Mapper to map the modules in the given Configuration 
to the built-in class loaders.

The rest looks good to me.

-Alan