json4s

I have a nested json whose structure is not defined. It can be different each time I run since I am reading from a remote file. I need to convert this json into a map of type Map[String, Any] . I tried to look into json4s and jackson parsers but they don't seem to solve this issue I have. Does anyone know how I can achieve this? Example string: {"body":{ "method":"string", "events":"string", "clients":"string", "parameter":"string", "channel":"string", "metadata":{ "meta1":"string", "meta2":"string", "meta3":"string" } }, "timestamp":"string"} The level of nesting can be arbitrary and not

Let's assume I have a case class with the following setup: case class Place(id:java.util.UUID, name:String) I can write a (working!) serializer for this type as follows: class placeSerializer extends CustomSerializer[Place]( format => ( { case JObject(JField("id", JString(s)) :: JField("name",JString(x)) :: Nil ) => Place(UUID.fromString(s), x) }, { case x:Place => JObject( JField("id", JString(x.id.toString())) :: JField("name", JString(x.name)) :: Nil) } ) ) But assuming my case class eventually has a lot more fields, this could lead to me enumerating the entire structure of the object with

I am having a generic json serialization method that uses json4s . Unfortunately, it is ignoring fields if the value is None . My goal is to have None fields be represented with a null value. I tried by adding custom serializer for None, but still it is not working. object test extends App { class NoneSerializer extends CustomSerializer[Option[_]](format => ( { case JNull => None }, { case None => JNull })) implicit val f = DefaultFormats + new NoneSerializer case class JsonTest(x: String, y: Option[String], z: Option[Int], a: Option[Double], b: Option[Boolean], c:Option[Date], d: Option[Any])

I have some case classes defined like follows: sealed trait Breed case object Beagle extends Breed case object Mastiff extends Breed case object Yorkie extends Breed case class Dog(name: String, breed: Breed) I also have an endpoint defined with Scalatra: post("/dog") { val dog = parsedBody.extract[Dog] ... } I'd like this JSON object: { name: "Spike", breed: "Mastiff" } to deserialize to the appropriate instance of Dog . I'm struggling to figure out how to write a custom deserializer for Breed and register it with JSON4S. You need to write the serializer like below: Serializer : case object