SemiJoke.scala

object ToMap_byHand2 {
  
  def toMap(entity: Level1CC): Map[String, Any] = new ToMap_byHandWrapper(entity)

  class ToMap_byHandWrapper(val entity: Level1CC) extends  Map[String, Any]  {
    type A = String
    type B = Any

    override def size = 3

    def get(key: String): Option[Any] =
      key match {
        case "id" => Some(entity.id)
        case "sub.timestamp" => Some(entity.sub.timestamp)
        case "sub.value" => Some(entity.sub.value)
        case _ => None
      }

    def iterator = Iterator(("id", entity.id), ("sub.timestamp", entity.sub.timestamp), ("sub.value", entity.sub.value))


    lazy val proxyMap: Map[A, Any] = iterator.toMap

    override def updated[B1 >: B](key: A, value: B1): Map[A, B1] = proxyMap.updated(key, value)

    def +[B1 >: B](kv: (A, B1)): Map[A, B1] = updated(kv._1, kv._2)

    def -(key: A): Map[A, B] = proxyMap - key

    override def foreach[U](f: ((A, B)) => U): Unit = {
      f(("id",entity.id))
      f(("sub.timestamp", entity.sub.timestamp))
      f(("sub.value", entity.sub.value))
    }
  }

  
}