xref: /aosp_15_r20/external/kotlinx.serialization/guide/example/example-poly-17.kt (revision 57b5a4a64c534cf7f27ac9427ceab07f3d8ed3d8)

// This file was automatically generated from polymorphism.md by Knit tool. Do not edit.
package example.examplePoly17

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

import kotlinx.serialization.modules.*

@Serializable
abstract class Response<out T>

@Serializable
@SerialName("OkResponse")
data class OkResponse<out T>(val data: T) : Response<T>()

val responseModule = SerializersModule {
    polymorphic(Response::class) {
        subclass(OkResponse.serializer(PolymorphicSerializer(Any::class)))
    }
}

val projectModule = SerializersModule {
    fun PolymorphicModuleBuilder<Project>.registerProjectSubclasses() {
        subclass(OwnedProject::class)
    }
    polymorphic(Any::class) { registerProjectSubclasses() }
    polymorphic(Project::class) { registerProjectSubclasses() }
}

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

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

val format = Json { serializersModule = projectModule + responseModule }

fun main() {
    // both Response and Project are abstract and their concrete subtypes are being serialized
    val data: Response<Project> =  OkResponse(OwnedProject("kotlinx.serialization", "kotlin"))
    val string = format.encodeToString(data)
    println(string)
    println(format.decodeFromString<Response<Project>>(string))
}