spray.json.derived.auto.scala Maven / Gradle / Ivy

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/*
 * Copyright 2021 Paolo Boni
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package spray.json.derived

import scala.deriving.Mirror
import spray.json.JsonFormat
import DiscriminatorMacro._

import scala.reflect.ClassTag

trait AutoDerivation extends WithConfiguration {
  implicit inline def deriveFormat[A: ClassTag](using
      inline A: Mirror.Of[A],
      mk: LazyMk[A]
  ): JsonFormat[A] =
    mk.mkJsonFormat.value(
      Context(
        discriminator = getDiscriminator[A].fold(Discriminator.default)(Discriminator.apply),
        typeName = implicitly[ClassTag[A]].toString()
      )
    )
}

object auto extends AutoDerivation