Factory pattern in Scala

Factory.scala

abstract class Vehicle(val color: String) {
  def price = 100 * factor
  def factor: Double
}

class Car(override val color: String) extends Vehicle(color) {
  val factor = 1.0
}

class Van(override val color: String) extends Vehicle(color) {
  val factor = 1.5
}

object Vehicle {
  def apply(typ: String, color: String) = typ match {
    case "CAR" => new Car(color)
    case "VAN" => new Van(color)
  }
}


object FactoryDemo {

  def main(args: Array[String]) {
    val vehicle = Vehicle(args(0), args(1))
    val typ = vehicle match {
      case c: Car => "car"
      case v: Van => "van"
    }
    println("A shiny %s %s costs %.0f pesos.".format(vehicle.color, typ, vehicle.price))
  }

}