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@file:UseContextualSerialization(ContextualTest.Cont::class)
package kotlinx.serialization.test
import kotlinx.serialization.KSerializer
import kotlinx.serialization.Serializable
import kotlinx.serialization.UseContextualSerialization
import kotlinx.serialization.descriptors.PrimitiveKind
import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
import kotlinx.serialization.descriptors.SerialDescriptor
import kotlinx.serialization.encodeToString
import kotlinx.serialization.encoding.Decoder
import kotlinx.serialization.encoding.Encoder
import kotlinx.serialization.json.Json
import kotlinx.serialization.modules.SerializersModule
import kotlinx.serialization.modules.contextual
class ContextualTest {
data class Cont(val i: Int)
@Serializable
data class DateHolder(val cont: Cont?)
object DateSerializer: KSerializer<Cont> {
override fun deserialize(decoder: Decoder): Cont {
return Cont(decoder.decodeInt())
}
override val descriptor: SerialDescriptor = PrimitiveSerialDescriptor("ContSerializer", PrimitiveKind.INT)
override fun serialize(encoder: Encoder, value: Cont) {
encoder.encodeInt(value.i)
}
}
val module = SerializersModule {
contextual(DateSerializer)
}
@kotlin.test.Test
fun test() {
val json = Json { serializersModule = module }
println(json.encodeToString(DateHolder(Cont(42))))
}
}
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