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    <p>Another alternatie using Lift-json could be:</p> <pre><code>package code.json import org.specs2.mutable.Specification import net.liftweb.json._ class JsonSpecs extends Specification { implicit val format = DefaultFormats val a = parse("""{ | "id": 100, | "text": "Hello, world." | "user": { | "name": "Brett", | "id": 200 | }, | "geo": { | "lat": 10.5, | "lng": 20.7 | } |}""".stripMargin) val b = parse("""{ | "id": 100, | "text": "Hello, world." | "user": { | "name": "Brett", | "id": 200 | } |}""".stripMargin) "Lift Json" should{ "find the id" in { val res= (a \ "id").extract[String] res must_== "100" } "find the name" in{ val res= (a \ "user" \ "name").extract[String] res must_== "Brett" } "find an optional geo data" in { val res= (a \ "geo" \ "lat").extract[Option[Double]] res must_== Some(10.5) } "ignore missing geo data" in { val res= (b \ "geo" \ "lat").extract[Option[Double]] res must_== None } } } </code></pre> <p>Note how when the geo data is missing on the val b, the parsing works just fine, expecting a None.</p> <p>Or do you want to get case classes as the result?</p> <p>For a case class example, see:</p> <p>package code.json</p> <pre><code>import org.specs2.mutable.Specification import net.liftweb.json._ class JsonSpecs extends Specification { implicit val format = DefaultFormats case class Root(id: Int, text: Option[String], user: Option[User], geo: Option[Geo]) case class User(name: String, id: Int) case class Geo(lat: Double, lng: Double) val c = parse("""{ | "id": 100 | "user": { | "name": "Brett", | "id": 200 | }, | "geo": { | "lng": 20.7 | } |}""".stripMargin) "Lift Json" should{ "return none for geo lat data" in { val res= c.extract[Root].geo.map(_.lat) res must_== None } } } </code></pre>
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