Polymorphic JSON unmarshall with Jackson in Scala

gistfile1.scala

import org.codehaus.jackson.annotate.{ JsonTypeInfo, JsonSubTypes, JsonProperty }
import org.codehaus.jackson.annotate.JsonSubTypes.Type
import org.codehaus.jackson.map.ObjectMapper

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
@JsonSubTypes(Array(
    new Type(value = classOf[Bingo], name = "x"),
    new Type(value = classOf[Bongo], name = "y"),
    new Type(value = classOf[Bungo], name = "z")
))
abstract class Base
class Bingo(@JsonProperty("v") value: Int) extends Base
class Bongo(@JsonProperty("wigs") val wiggles: String, @JsonProperty("fish") val fish: Boolean) extends Base
class Bungo(@JsonProperty("soufflé") val soufflé: String) extends Base

object App {
    def main(args: Array[String]) {
        val bingo = """{"type":"x","v":"56"}"""
        val bongo = """{"type":"y","wigs":"free wigs for everyone!","fish":"true"}"""
        val bungo = """{"type":"z","soufflé":"no thanks, i've just put one out"}"""

        new ObjectMapper().readValue(bongo, classOf[Base]) match {
            case a: Bingo ⇒ println("Bingo!")
            case b: Bongo ⇒ if (b.fish) println(b.wiggles)
            case c: Bungo ⇒ println(c.soufflé)
        }
    }
}