An Elvis operator aware of empty strings

elvis.scala

object ElvisOP {
  implicit def any2elvis(x: Any) = new ElvisOP(Option(x))
}
class ElvisOP(me: Option[Any]) {
  def ?> (that: Any) = me match{
    case Some(s: String) => s match {
      case _ if s.isEmpty() => that
      case _ => s
    }
    case Some(b: Boolean) => if(!b) that else b
    case Some(s) => s
    case None => that
  }
}