Exemplo de conversão de JSON para classe

convert.kt

import org.json.JSONObject
import org.json.JSONArray

class Task(val title:String, val email:String, val description:String) {
     fun convertToJSON(): JSONObject {
        val json = JSONObject()
        json.put("title", title)
        json.put("email", email)
        json.put("description", description)
        return json
     }
}

class Tasks(){
    val tasks = arrayListOf<Task>()
    
    fun convertToObject(items: JSONArray): ArrayList<Task> {
       (0 until items.length()).forEach {
          tasks.add(Task(it.getString("title"), it.getString("email"), it.getString("description"))
       }
       
       return tasks
    }
}


fun main() {
    val body = """{"data":[{"_id":"adf0f707-b6c7-4167-be34-83a73950d36e","description":"lorem ipsum","email":"sofie@mysofie.com","when":"2020-04-15T19:14:39.094560","title":"tarefa 4"},{"_id":"372efad7-9c69-4753-bf9b-ee7741aaed0c","description":"lorem ipsum","email":"sofie@sofie.com","when":"2020-04-15T15:41:49.074693","title":"tarefa 3"},{"_id":"15893f63-17b4-4ef3-bc69-019fda35c339","description":"lorem ipsum","email":"sofie@sofie.com","when":"2020-04-15T15:39:19.126486","title":"tarefa 2"}]}""".trimMargin()
    val tasks = Tasks().convertToObject(body.getJSONArray("data"))
    
    
    val task = tasks[0]
    
    val title = task.title
    val email = task.email
  
  
    val json = task.convertToJSON()
    println(json)
}