guide/example/example-json-26.kt


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// This file was automatically generated from json.md by Knit tool. Do not edit.
package example.exampleJson26

import kotlinx.serialization.*
import kotlinx.serialization.json.*

import kotlinx.serialization.builtins.*

@Serializable
abstract class Project {
    abstract val name: String
}

@Serializable
data class BasicProject(override val name: String): Project()


@Serializable
data class OwnedProject(override val name: String, val owner: String) : Project()

object ProjectSerializer : JsonContentPolymorphicSerializer<Project>(Project::class) {
    override fun selectDeserializer(element: JsonElement) = when {
        "owner" in element.jsonObject -> OwnedProject.serializer()
        else -> BasicProject.serializer()
    }
}

fun main() {
    val data = listOf(
        OwnedProject("kotlinx.serialization", "kotlin"),
        BasicProject("example")
    )
    val string = Json.encodeToString(ListSerializer(ProjectSerializer), data)
    println(string)
    println(Json.decodeFromString(ListSerializer(ProjectSerializer), string))
}