I'm working with JAX-RS in Scala and trying to parameterise a call to:

val jc = JAXBContext.newInstance(classOf[MyClassName])

I've been using ClassManifests as per the answer here but have a couple of things I'm still struggling with. As background, my JAX-RS representations all extend a stubbed Representation class:

class Representation {}

class ExampleRepresentation extends Representation { ... }

So far I've defined my function using a ClassManifest like so:

def get[R: ClassManifest](representation: R): String = {
  val jc = JAXBContext.newInstance(classManifest[R].erasure)
  ...
}

My first question is a bit of a silly one: how do I call this function? I can't figure out what to pass in to get() for the R type and the representation value (the accepted answer to the original question doesn't make this clear). I tried implicit typing as per paradigmatic's comment but the below generates a compile error:

get(PlatformRepresentation)

Compiling main sources... 
  not found: value PlatformRepresentation

My second question is: is it possible to apply an upper type bound on the R object? In other words, I know that:

R <: Representation

Is there a way of bounding this in get()'s ClassManifest type declaration?

Many thanks!