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Apollo GraphQL API classes

There is a newer version: 4.0.0-beta.7

package com.apollographql.apollo3.api

import com.apollographql.apollo3.api.json.JsonReader
import com.apollographql.apollo3.api.json.JsonWriter
import okio.IOException
import kotlin.jvm.JvmField

/**
 * A [CompositeAdapter] is responsible for adapting Kotlin-generated GraphQL composite types to/from their Json representation.
 *
 * It is used to
 * - deserialize network responses
 * - normalize models into records that can be stored in cache
 * - deserialize records
 *
 * This class is implemented by the generated code, it shouldn't be used directly.
 */
interface CompositeAdapter {
  @Throws(IOException::class)
  fun fromJson(reader: JsonReader, adapterContext: CompositeAdapterContext): T

  @Throws(IOException::class)
  fun toJson(writer: JsonWriter, value: T, adapterContext: CompositeAdapterContext)
}

class CompositeAdapterContext private constructor(
    @JvmField
    val customScalarAdapters: CustomScalarAdapters,

    @JvmField
    val falseVariables: Set,

    @JvmField
    val deferredFragmentIdentifiers: Set?,
) {
  class Builder {
    private var customScalarAdapters: CustomScalarAdapters? = null
    private var falseVariables: Set? = null
    private var deferredFragmentIdentifiers: Set? = null

    fun customScalarAdapters(customScalarAdapters: CustomScalarAdapters) = apply {
      this.customScalarAdapters = customScalarAdapters
    }

    fun falseVariables(falseVariables: Set?) = apply {
      this.falseVariables = falseVariables
    }
    fun deferredFragmentIdentifiers(deferredFragmentIdentifiers: Set?) = apply {
      this.deferredFragmentIdentifiers = deferredFragmentIdentifiers
    }

    fun build(): CompositeAdapterContext {
      return CompositeAdapterContext(
          customScalarAdapters ?: CustomScalarAdapters.Empty,
          falseVariables ?: emptySet(),
          deferredFragmentIdentifiers
      )
    }

  }
}

fun  CompositeAdapter.toJson(writer: JsonWriter, customScalarAdapters: CustomScalarAdapters, value: T) {
  toJson(writer, value, CompositeAdapterContext.Builder().customScalarAdapters(customScalarAdapters).build())
}

fun  CompositeAdapter.fromJson(reader: JsonReader, customScalarAdapters: CustomScalarAdapters): T {
  return fromJson(reader, CompositeAdapterContext.Builder().customScalarAdapters(customScalarAdapters).build())
}