JsonSerializer

class StudentSerializer : JsonSerializer<Student> {

    override fun serialize(src: Student?, typeOfSrc: Type?, context: JsonSerializationContext?): JsonElement {

        val jsonObject = JsonObject()

        try {

            jsonObject.add("name", context?.serialize(src.name))
            jsonObject.add("address", JsonParser().parse(src.address))

        }catch (e: Exception){
        Logger.e(Tag, e)
        }

        return jsonObject
    }
}