Kotlin - moshi convert JSON string list to list of objects

moshi-list-example.kt

package main

import com.github.kittinunf.fuel.httpGet
import com.github.kittinunf.result.Result
import com.squareup.moshi.JsonAdapter
import com.squareup.moshi.Moshi
import com.squareup.moshi.Types
import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
import java.lang.reflect.Type

class Post (
        val title: String = "",
        val userId: Int = 0,
        val id: Int = 0,
        val body: String = "") {

    override fun toString(): String {
        return "id=${id}  title=${title}"
    }
}

fun main() {
    val moshi: Moshi = Moshi.Builder()
            .add(KotlinJsonAdapterFactory())
            .build()

    val httpAsync = "https://jsonplaceholder.typicode.com/posts"
            .httpGet()
            .responseString { request, response, result ->
                when (result) {
                    is Result.Failure -> {
                        val ex = result.getException()
                        println(ex)
                    }
                    is Result.Success -> {
                        val data = result.get()
                        println(data)

                        val type: Type = Types.newParameterizedType(List::class.java, Post::class.java)
                        val adapter: JsonAdapter<List<Post>> = moshi.adapter(type)

                        val posts: List<Post>? = adapter.fromJson(data)

                        for(post in posts!!) {
                            println(post)
                        }
                    }
                }
            }

    httpAsync.join()
}