io.circe.generic.extras.encoding.ReprObjectEncoder.scala Maven / Gradle / Ivy
package io.circe.generic.extras.encoding
import io.circe.{ Encoder, Json, JsonObject, ObjectEncoder }
import io.circe.generic.extras.ConfigurableDeriver
import scala.language.experimental.macros
/**
* An encoder for a generic representation of a case class or ADT.
*
* Note that users typically will not work with instances of this class.
*/
abstract class ReprObjectEncoder[A] extends ObjectEncoder[A] {
def configuredEncodeObject(a: A)(
transformMemberNames: String => String,
transformDiscriminator: String => String,
discriminator: Option[String]
): JsonObject
final protected[this] def addDiscriminator[B](
encode: Encoder[B],
value: B,
name: String,
discriminator: Option[String]
): JsonObject = discriminator match {
case None => JsonObject.singleton(name, encode(value))
case Some(disc) => encode match {
case oe: ObjectEncoder[B] @unchecked => oe.encodeObject(value).add(disc, Json.fromString(name))
case _ => JsonObject.singleton(name, encode(value))
}
}
final def encodeObject(a: A): JsonObject = configuredEncodeObject(a)(Predef.identity, Predef.identity, None)
}
final object ReprObjectEncoder {
implicit def deriveReprObjectEncoder[R]: ReprObjectEncoder[R] = macro ConfigurableDeriver.deriveEncoder[R]
}