ticket_factory_1.rb

class TicketFactory
  def self.ticket_for opts
    class_for(opts[:vehicle_type]).new(opts)
  end

  def self.class_for vehicle_type
    case vehicle_type
    when 'Truck'
      TruckParkingTicket
    when 'Matatu'
      MatatuParkingTicket
    when 'Public Bus'
      PublicBusParkingTicket
    else
      ParkingTicket
    end
  end
end