• Home
• net.playq
• dynamo_2.13
• 1.0.0
• source code
• ReversedUUIDKey.scala

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

d4s.util.ReversedUUIDKey.scala Maven / Gradle / Ivy

package d4s.util

import java.util.UUID

import d4s.codecs.DynamoKeyAttribute
import izumi.fundamentals.platform.language.Quirks
import io.circe.{Decoder, Encoder}
import software.amazon.awssdk.services.dynamodb.model.ScalarAttributeType

/** An [[OrderedUUIDKey]] rendered with inverted digits and minus sign to reverse range key ordering in DynamoDB */
final case class ReversedUUIDKey private (asString: String) extends AnyVal

object ReversedUUIDKey {
  def apply(uuid: UUID): ReversedUUIDKey = {
    apply(OrderedUUIDKey(uuid))
  }

  def apply(digitUUID: OrderedUUIDKey)(implicit dummy: DummyImplicit): ReversedUUIDKey = {
    Quirks.discard(dummy)
    ReversedUUIDKey(negateMinus(negateDigits(digitUUID.asString)))
  }

  // encode as string
  implicit val encoder: Encoder[ReversedUUIDKey] = Encoder[String].contramap(_.asString)
  implicit val decoder: Decoder[ReversedUUIDKey] = Decoder[String].map(ReversedUUIDKey(_))

  implicit val keyAttribute: DynamoKeyAttribute[ReversedUUIDKey] = new DynamoKeyAttribute[ReversedUUIDKey](ScalarAttributeType.S)

  implicit val ordering: Ordering[ReversedUUIDKey] = Ordering[String].on(_.asString)
}