Json格式-Scala

Question

I need to build a Json format in the following way in scala. How to implement the same ?

{
 "name": "protocols",
 "children": [
  {
   "name": "tcp", "children": [
     {
      "name": "source 1",
    "children": [
     {
      "name": "destination 1",
        "children": [
     {
      "name": "packet 1"
     },
     {
      "name": "packet 4"
     }
   ]
     },
     {
      "name": "destination 2","children": [
     {
      "name": "packet 1"
     },

     {
      "name": "packet 4"
     }
   ]
     },

I need a tree structure like this to be wriiten to a file .

Answer 1

If you are using play, your json structure can be represented with single case class

Here is a sample, where this case class is called Node

import play.api.libs.json.Json

case class Node(name: String, children: List[Node] = Nil)

implicit val format = Json.format[Node]

val childSource1 = Node("destination 1", List(Node("packet 1"), Node("packet 4")))
val childSource2 = Node("destination 2", List(Node("packet 1"), Node("packet 4")))

val source1 = Node("source 1", List(childSource1, childSource2)) 

val example = Node("protocols", List(Node("tcp", List(source1))))

Json.prettyPrint(Json.toJson(example))