how to do it in scala

def howToDoItInScala(task: Task) = {
  int retVal = 0;
  //object not stored yet in db
  if(task.id() == 0){
    //store it now
    task.save()
    // retrieve the new database id
    retVal = task.id()
  }
  else{
    // dont change the retVal if object did exist already in db
    task.save()
  }
}