JSON deserialization in Scala

json2caseclass.scala

  //CASE CLASSES
  case class Location(lat: Double, lng: Double)
  case class Geometry(location: Location)
  case class RunningStatus(open_now: Boolean)
  case class Results(geometry: Geometry, icon: Option[String], id: Option[String], name: Option[String],
    opening_hours: Option[RunningStatus], price_level: Option[Double], rating: Option[Double],
    reference: Option[String], types: Option[List[String]], vicinity: Option[String])
  case class RootJsonObject(results: List[Results])

  //JSON imports
  import org.json4s.jackson.Serialization
  import org.json4s.jackson.Serialization.{ read }
  import org.json4s.NoTypeHints

  private def handleJsonOutput(body: String): Unit = {
    //required to set implicit here for JSON serialization to work properly
    implicit val formats = Serialization.formats(NoTypeHints)

    //read the output as a RootJsonObject instance
    //the read call does the trick of mapping JSon to the case classes
    val output = read[RootJsonObject](body)
    println(s"Total Results: ${output.results.size}")

    for (each <- output.results)
      println(s"${each.name.get} at ${each.vicinity.get}")
  }