Spray Json to Reactive Mongo ObjectId

ObjectIdSerialization.scala

import spray.json.DefaultJsonProtocol

/**
  * Created by duane on 12/11/2015.
  */
trait ObjectIdSerialization extends DefaultJsonProtocol {

  import reactivemongo.bson.BSONObjectID
  import spray.json._

  val objectIDRegEx = "^[0-9a-fA-F]{24}$".r
  def isObjectIDValid(input: String): Boolean = (objectIDRegEx findFirstIn input).nonEmpty

  implicit object ObjectIdJsonFormat extends RootJsonFormat[BSONObjectID] {

    def write(iod: BSONObjectID): JsValue = {
      new JsString(iod.stringify)
    }

    def read(jsValue: JsValue): BSONObjectID = {
      jsValue match {
        case JsString(oid) =>
          if(isObjectIDValid(oid)){
            BSONObjectID(oid)
          } else {
            throw new DeserializationException(s"[$oid] is not a valid ObjectID")
          }
        case _ => 
          throw new DeserializationException("String expected")
      }
    }
  }
}