RFR: 8157474: clean up/simplify/rename ModuleWrappers class

[Jonathan Gibbons]

On 05/20/2016 04:20 PM, Mandy Chung wrote:
>> On May 20, 2016, at 1:54 PM, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:
>>
>> Please review this change to simplify and rename the javac ModuleWrappers class.
>> There is no deliberate change in functionality.
>>
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8157474
>> Webrev: http://cr.openjdk.java.net/~jjg/8157474/webrev.00/
> Looks fine.  Nits:
>
>    58     public static final class ServiceLoaderHelper {
>
> You have a good convention to name the helper class same as the JDK 9 class name.  Should this ServiceLoaderHelper one be renamed to “ServiceLoader” too?

Good point.  It was deliberate to use Helper, but since we only use this 
for a static method, and never need to create a wrapped instance of 
ServiceLoader, we can probably simplify the name.

>
> On this Class::forName call:
>   123                     moduleFinderClass = Class.forName("java.lang.module.ModuleFinder", false, ClassLoader.getSystemClassLoader());
>
> It’s okay to use ClassLoader.getSystemClassLoader() for delegation.  Since the classes are in java.base, it’s safe to always pass null loader.  It’s nit.

null is good.  Thanks for the tip.

>
> Mandy