Scala Enumerations

Enumerations.scala

object ActionType extends Enumeration {
  type ActionType = Value
  val GET = Value("Get")
  val SET = Value("Set")

  implicit def stringToActionType(action: String): ActionType = action match {
    case "Get" => GET
    case "Set" => SET
  }
}

sealed trait Market
case object HongKong extends Market
case object Singapore extends Market
case object NewYork extends Market
case object Tokyo extends Market
case object Other extends Market

def makeMarket(m: String) = m match {
  case "HongKong" => HongKong
  case "Singapore" => Singapore
  case "NewYork" => NewYork
  case "Tokyo" => Tokyo
  case _ => Other
}

sealed abstract class SideAndShort(val side: Byte, val shortSell: Byte)
case object Buy extends SideAndShort('B', ' ')
case object Sell extends SideAndShort('S', ' ')
case object SellShort extends SideAndShort('S', '1')
case object SellShortExempt extends SideAndShort('S', '1')