Play Json Reading a Recursive Class - Alternative Solution

gistfile1.txt

trait Animal

case class Bird(name: String, wings: Boolean) extends Animal

case class Horse(name: String, height: Double) extends Animal



object Animal {

  implicit val birdReads: Reads[Bird] = (

    (JsPath \ "name").read[String] and

    (JsPath \ "wing").read[Boolean]

  )(Bird.apply _)

  

  implicit val horseReads: Reads[Horse] = (

    (JsPath \ "name").read[String] and

    (JsPath \ "height").read[Double]

  )(Horse.apply _)

    

  def fromJson(json: JsValue): JsResult[Animal] = {

    (json \ "wings").asOpt[Boolean] match {

      case Some(true) => json.validate[Bird](birdReads)

      case _ => json.validate[Horse](horseReads)

    }

  }

}