com.jakewharton.retrofit2.converter.kotlinx.serialization.Serializer.kt Maven / Gradle / Ivy

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A Converter.Factory for Kotlin's serialization support.

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package com.jakewharton.retrofit2.converter.kotlinx.serialization

import java.lang.reflect.Type
import kotlinx.serialization.BinaryFormat
import kotlinx.serialization.DeserializationStrategy
import kotlinx.serialization.ExperimentalSerializationApi
import kotlinx.serialization.KSerializer
import kotlinx.serialization.SerialFormat
import kotlinx.serialization.SerializationStrategy
import kotlinx.serialization.StringFormat
import kotlinx.serialization.serializer
import okhttp3.MediaType
import okhttp3.RequestBody
import okhttp3.ResponseBody

internal sealed class Serializer {
  abstract fun  fromResponseBody(loader: DeserializationStrategy, body: ResponseBody): T
  abstract fun  toRequestBody(contentType: MediaType, saver: SerializationStrategy, value: T): RequestBody

  @OptIn(ExperimentalSerializationApi::class) // Experimental is only for subtypes.
  protected abstract val format: SerialFormat

  @ExperimentalSerializationApi // serializer(Type) is not stable.
  fun serializer(type: Type): KSerializer = format.serializersModule.serializer(type)

  @OptIn(ExperimentalSerializationApi::class) // Experimental is only for subtypes.
  class FromString(override val format: StringFormat) : Serializer() {
    override fun  fromResponseBody(loader: DeserializationStrategy, body: ResponseBody): T {
      val string = body.string()
      return format.decodeFromString(loader, string)
    }

    override fun  toRequestBody(contentType: MediaType, saver: SerializationStrategy, value: T): RequestBody {
      val string = format.encodeToString(saver, value)
      return RequestBody.create(contentType, string)
    }
  }

  @OptIn(ExperimentalSerializationApi::class) // Experimental is only for subtypes.
  class FromBytes(override val format: BinaryFormat) : Serializer() {
    override fun  fromResponseBody(loader: DeserializationStrategy, body: ResponseBody): T {
      val bytes = body.bytes()
      return format.decodeFromByteArray(loader, bytes)
    }

    override fun  toRequestBody(contentType: MediaType, saver: SerializationStrategy, value: T): RequestBody {
      val bytes = format.encodeToByteArray(saver, value)
      return RequestBody.create(contentType, bytes)
    }
  }
}