JRuby Class loader proxy

jrubyclassloader.rb

  # FXML requires loading both ruby and java classes.
  # JRuby has no such single classloader builtin, so we proxy them all
  # This is a minimal classloader only for classes, resources not supported
  class PolyglotClassLoader < java.lang.ClassLoader
    def initialize()
      super(JRuby.runtime.jruby_class_loader)
    end
    java_signature "java.lang.Class findClass(java.lang.String name)"
    def findClass(a)
      # TODO: full Ruby modules?
        begin # TODO: become_java! idempotent?
          return Object.const_get(a.split(".").last).tap{|x| x.become_java!}.java_class
        rescue NameError
          raise java.lang.ClassNotFoundException.new("Could not find ruby class #{a}!") # Must be a java CNF, not a Ruby Name Error
        end
    end
    become_java!
  end