Scala classOf for type parameter

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Due Manifest is deprecated (Since Scala 2.10.0) this is the updated answer –

import scala.reflect.ClassTag
import scala.reflect._

object WorkUnitController extends Controller {
  def updateObject[T: ClassTag](toUpdate: T, body: JsonObject){
    val source = gson.fromJson(body, classTag[T].runtimeClass)
    ???
  }
}

You should use ClassTag instead of ClassManifest
and .runtimeClass instead of .erasure

Original answer –
Yes, you can do that using manifests:

object WorkUnitController extends Controller {     
 def updateObject[T: ClassManifest](toUpdate: T, body: JsonObject){
  val source = gson.fromJson(body, classManifest[T].erasure);
  ...
 }
}

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