gistfile1.scala

 def wrap[T](obj: Any)(implicit tag: ClassTag[T]): T = {
    obj match {
      case t: T => t
      case jrObj: JRubyObject if tag.runtimeClass == classOf[RubyObject] => new RubyObject(jrObj)
      case _ if tag.runtimeClass == classOf[Nothing] || tag.runtimeClass == classOf[Unit] => null:T
      case _ => throw new IllegalTypeConversion(obj.getClass, tag.runtimeClass)
    }
  }

def send[T](target: JRubyObject, name: Symbol, args: Any*)(implicit tag: ClassTag[T]): T = {
    handleException(
                     wrap[T](
                              ruby.callMethod(target, name.name, unwrap(args:_*):_*)
                            )
                   )
  }