Some JSON magic in Play.

Application.scala

package controllers

import play.api._
import play.api.mvc._
import play.api.libs.json._
import play.api.libs.functional.syntax._

object Application extends Controller {


  implicit val jsonifier = ( 
    (__ \ "id").format[Int] and
    (__ \ "name").format[String]
  )(Shannon.apply, unlift(Shannon.unapply)) 

  case class Shannon(val id: Int, val name: String)

  def index = Action {
    val json = """[{"id":1,"name":"james"},{"id":2,"name":"shannon"}]"""
    val list = Json.fromJson[List[Shannon]](Json.parse(json))    
    Ok(Json.toJson(list.get))
  }

}