Using EntityManagerFactoryImpl.newInstanceWithClassNames doesn't work on Mac OS

[grouchal]

NB This is Issue 39 at google code: http://code.google.com/p/simplejpa/issues/detail?id=39

What steps will reproduce the problem?
1.Call the method EntityManagerFactoryImpl.newInstanceWithClassNames with a list of class names that are located in a jar file and run on MAC OS X
2.Run a query against the EntityManager referencing one of the classes loaded from the jar file - exception thrown with file not found.

What is the expected output?
Should run without exception
What do you see instead?
A FileNotFoundException

What version of the product are you using? On what operating system?
1.6-SNAPSHOT on OSX 10.6.7

Please provide any additional information below.
The problem is actually caused in the method getLibsToScan

the line :

libs.add(resource.getFile().split("!")[0].substring(6));

is stripping off the leading slash so that

file:/Users/..... becomes Users/.....

this maybe what is required on Windows, but breaks on Mac OS and possibly also on *nix

Changing the line to:

libs.add(resource.getFile().split("!")[0].substring(5));

solves the problem but I would like someone to test on Windows before I commit the change.