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/*
* Copyright 2017-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
@file:Suppress("RedundantVisibilityModifier")
package kotlinx.serialization
import kotlinx.serialization.modules.*
import kotlin.reflect.*
/**
* This class provides support for retrieving a serializer in runtime, instead of using the one precompiled by the serialization plugin.
* This serializer is enabled by [ContextualSerialization].
*
* Typical usage of ContextSerializer would be a serialization of a class which does not have
* static serializer (e.g. Java class or class from 3rd party library);
* or desire to override serialized class form in one dedicated output format.
*
* Serializers are being looked for in a [SerialModule] from the target [Encoder] or [Decoder], using statically known [KClass].
* To create a serial module, use [SerializersModule] factory function.
* To pass it to encoder and decoder, refer to particular [SerialFormat]'s documentation.
*/
@ImplicitReflectionSerializer
public class ContextSerializer<T : Any>(private val serializableClass: KClass<T>) : KSerializer<T> {
public override val descriptor: SerialDescriptor = SerialDescriptor("kotlinx.serialization.ContextSerializer", UnionKind.CONTEXTUAL) {}
public override fun serialize(encoder: Encoder, value: T) {
val serializer = encoder.context.getContextualOrDefault(value)
encoder.encodeSerializableValue(serializer, value)
}
public override fun deserialize(decoder: Decoder): T {
val serializer = decoder.context.getContextualOrDefault(serializableClass)
return decoder.decodeSerializableValue(serializer)
}
}
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