Hands-On Object-Oriented Programming with Kotlin

Serialization and Kotlin support

In this section, we will look at the kotlinx.serialization library. This consists of three parts:

• Plugin
• Compiler
• Library

To make a class serializable, we should mark it with the @Serializable annotation:

@Serializabledata class Person(        val id: Int = 0,        val first_name: String,        val last_name: String,        val phones: List<String> = listOf())

We can serialize an instance of this class to JSON by using the following code:

fun main(args: Array<String>) {    println(JSON.stringify(Person(first_name = "Igor", last_name = "Kucherenko")))}

The output looks like this:

{"id":0,"first_name":"Igor","last_name":"Kucherenko","phones":[]}

We can deserialize JSON by using the following code:

val jsonPerson = """{"id":0,"first_name":"Igor","last_name":"Kucherenko","phones":[]}""" ...