test.kt

package test

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.kotlin.readValue


data class Data<T>(val data: T, val smt: String)

fun main(args: Array<String>) {
    val str = "{\"data\":\"some string\", \"smt\":\"some name\"}"

    val r = readSmth<String>()
    println(r)
}

fun <T : Any>readSmth(): Data<T> {
    val str = "{\"data\":\"some string\", \"smt\":\"some name\"}"
    val objectMapper = ObjectMapper()
    return  objectMapper.readValue<Data<T>>(str)
}

inline fun <reified T: Any> parseJson(json: String): T {
    val objectMapper = ObjectMapper()
    return objectMapper.readValue<Data<T>>(json).data
}