Can't parse json in Kotlin - json

Question

I have a json like this:
{"ok":true,"result":[{"update_id":853803195,
"message":{"message_id":313,"from":{"id":104906563,"is_bot":false,"first_name":"AL","username":"alzvaracc","language_code":"en"},"chat":{"id":104906563,"first_name":"AL","username":"alzvaracc","type":"private"},"date":1594723984,"text":"/start","entities":[{"offset":0,"length":6,"type":"bot_command"}]}},{"update_id":853803196,
"message":{"message_id":314,"from":{"id":104906563,"is_bot":false,"first_name":"AL","username":"alzvaracc","language_code":"en"},"chat":{"id":104906563,"first_name":"AL","username":"alzvaracc","type":"private"},"date":1594723986,"text":"e"}},{"update_id":853803197,
"message":{"message_id":325,"from":{"id":104906563,"is_bot":false,"first_name":"AL","username":"alzvaracc","language_code":"en"},"chat":{"id":104906563,"first_name":"AL","username":"alzvaracc","type":"private"},"date":1594734252,"text":"\ud83d\ude06"}},{"update_id":853803198,
"message":{"message_id":328,"from":{"id":104906563,"is_bot":false,"first_name":"AL","username":"alzvaracc","language_code":"en"},"chat":{"id":104906563,"first_name":"AL","username":"alzvaracc","type":"private"},"date":1594736358,"text":"5"}}]}
I'm using klaxon library.
Like in the first example I created a class:
class Response(val ok: Boolean, val result: String)
I was trying to save the second parameter to a string, so I could parse it, too, later. But I get a exception like this:
Unable to instantiate Response with parameters [ok: true, result: [, , , ]]
I tried making result a JsonObject (or a JsonArray of JsonObjects) and got this
Unable to instantiate JsonObject with parameters []
The only thing that more or less worked was a List<Any>. Result becomes a list of java objects like this:
[java.lang.Object#680362a, java.lang.Object#3569edd5, java.lang.Object#1f651cd8, java.lang.Object#7d0332e1]
But I don't know how to deal with them. So my question is what do I do? How do I get the result I will be able to work with?

Answer 1

Try this class
import com.beust.klaxon.*
private val klaxon = Klaxon()
data class User (
val ok: Boolean,
val result: List<Result>
) {
public fun toJson() = klaxon.toJsonString(this)
companion object {
public fun fromJson(json: String) = klaxon.parse<User>(json)
}
}
data class Result (
#Json(name = "update_id")
val updateID: Long,
val message: Message
)
data class Message (
#Json(name = "message_id")
val messageID: Long,
val from: From,
val chat: Chat,
val date: Long,
val text: String,
val entities: List<Entity>? = null
)
data class Chat (
val id: Long,
#Json(name = "first_name")
val firstName: String,
val username: String,
val type: String
)
data class Entity (
val offset: Long,
val length: Long,
val type: String
)
data class From (
val id: Long,
#Json(name = "is_bot")
val isBot: Boolean,
#Json(name = "first_name")
val firstName: String,
val username: String,
#Json(name = "language_code")
val languageCode: String
)