Scala Encoder类代码示例

//设置package包名称以及导入依赖的类
package com.ulasakdeniz.hakker

import akka.http.scaladsl.marshalling.{Marshal, ToEntityMarshaller}
import akka.http.scaladsl.model.{HttpHeader, HttpResponse, ResponseEntity, StatusCode}
import akka.http.scaladsl.server.Directives._
import akka.http.scaladsl.server.Route
import com.typesafe.config.ConfigFactory
import com.ulasakdeniz.hakker.template.Render
import de.heikoseeberger.akkahttpcirce.CirceSupport._
import io.circe.{Encoder, Json}
import io.circe.syntax._

import scala.collection.immutable
import scala.concurrent.ExecutionContext

trait Controller extends Render {

  override lazy val config = ConfigFactory.load()
  val StatusCodes          = akka.http.scaladsl.model.StatusCodes

  def route: Route

  def apply(): Route = {
    get {
      // render frontend files
      pathPrefix("js") {
        renderDir("js")
      }
    } ~ route
  }

  def send(statusCode: StatusCode): Route = complete(statusCode)

  def send[T](statusCode: StatusCode, content: T, headers: immutable.Seq[HttpHeader] = Nil)(
      implicit marshaller: ToEntityMarshaller[T],
      ec: ExecutionContext): Route = {
    val response = Marshal(content)
      .to[ResponseEntity](marshaller, ec)
      .map(entity => {
        HttpResponse(statusCode, headers = headers).withEntity(entity)
      })
    complete(response)
  }

  def sendJson[T](statusCode: StatusCode, content: T)(implicit encoder: Encoder[T],
                                                      ec: ExecutionContext): Route = {
    sendJson(statusCode, content.asJson)
  }

  def sendJson[T](content: T)(implicit encoder: Encoder[T], ec: ExecutionContext): Route = {
    sendJson(StatusCodes.OK, content)
  }

  def sendJson(statusCode: StatusCode, json: Json)(implicit ec: ExecutionContext): Route = {
    send(statusCode, Option(json.noSpaces))
  }
} 

//设置package包名称以及导入依赖的类
package io.circe.spray

import io.circe.{ Decoder, Encoder, RootEncoder }


case class RootDecoder[A](underlying: Decoder[A])

final object RootDecoder extends LowPriorityRootDecoders {
  implicit def rootDecoderWithRootEncoder[A](implicit decoder: Decoder[A], encoder: RootEncoder[A]): RootDecoder[A] =
    RootDecoder(decoder)
}

private[spray] sealed class LowPriorityRootDecoders {
  implicit def rootDecoderBlocker1[A](implicit decoder: Decoder[A], encoder: Encoder[A]): RootDecoder[A] =
    RootDecoder(decoder)
  implicit def rootDecoderBlocker2[A](implicit decoder: Decoder[A], encoder: Encoder[A]): RootDecoder[A] =
    RootDecoder(decoder)
  implicit def rootDecoder[A](implicit decoder: Decoder[A]): RootDecoder[A] = RootDecoder(decoder)
} 

//设置package包名称以及导入依赖的类
package aecor.example

import io.circe.{ Decoder, Encoder }
import shapeless.Unwrapped

trait AnyValCirceEncoding {
  implicit def anyValEncoder[V, U](implicit ev: V <:< AnyVal,
                                   V: Unwrapped.Aux[V, U],
                                   encoder: Encoder[U]): Encoder[V] = {
    val _ = ev
    encoder.contramap(V.unwrap)
  }

  implicit def anyValDecoder[V, U](implicit ev: V <:< AnyVal,
                                   V: Unwrapped.Aux[V, U],
                                   decoder: Decoder[U]): Decoder[V] = {
    val _ = ev
    decoder.map(V.wrap)
  }
}

object AnyValCirceEncoding extends AnyValCirceEncoding

object CirceSupport
    extends de.heikoseeberger.akkahttpcirce.FailFastCirceSupport
    with AnyValCirceEncoding 

//设置package包名称以及导入依赖的类
package org.danielnixon.progressive.shared.api

import io.circe.{ Decoder, Encoder }
import io.circe.generic.semiauto.{ deriveDecoder, deriveEncoder }
import org.danielnixon.progressive.shared.Wart

final case class FormSettings(
  ajax: Boolean = true,
  target: Option[Target] = None,
  refreshTarget: Option[Target] = Some(Target.ClosestRefresh),
  busyMessage: Option[String] = None,
  focusTarget: Boolean = true,
  reloadPage: Boolean = false,
  confirmMessage: Option[String] = None,
  confirmedAction: Option[String] = None,
  ajaxAction: Option[String] = None,
  remove: Boolean = false,
  resetForm: Boolean = false
)

@SuppressWarnings(Array(Wart.Nothing))
object FormSettings {
  implicit val decoder: Decoder[FormSettings] = deriveDecoder[FormSettings]
  implicit val encoder: Encoder[FormSettings] = deriveEncoder[FormSettings]

  def asJson(target: FormSettings): String = Json.asJson(target)

  def fromJson(json: String): Option[FormSettings] = Json.fromJson(json)
} 

//设置package包名称以及导入依赖的类
package org.danielnixon.progressive.shared.api

import io.circe.{ Decoder, Encoder }
import io.circe.generic.semiauto.{ deriveDecoder, deriveEncoder }
import org.danielnixon.progressive.shared.Wart

final case class LinkSettings(
  target: Target,
  busyMessage: Option[String] = None,
  focusTarget: Boolean = true,
  href: Option[String] = None
)

@SuppressWarnings(Array(Wart.AsInstanceOf, Wart.Nothing))
object LinkSettings {
  implicit val decoder: Decoder[LinkSettings] = deriveDecoder[LinkSettings]
  implicit val encoder: Encoder[LinkSettings] = deriveEncoder[LinkSettings]

  def asJson(target: LinkSettings): String = Json.asJson(target)

  def fromJson(json: String): Option[LinkSettings] = Json.fromJson(json)
} 

//设置package包名称以及导入依赖的类
package org.danielnixon.progressive.shared.api

import io.circe.{ Decoder, Encoder }
import io.circe.generic.semiauto.{ deriveDecoder, deriveEncoder }
import org.danielnixon.progressive.shared.Wart

final case class SubmitButtonSettings(
  target: Option[Target] = None,
  busyMessage: Option[String] = None
)

@SuppressWarnings(Array(Wart.Nothing))
object SubmitButtonSettings {
  implicit val decoder: Decoder[SubmitButtonSettings] = deriveDecoder[SubmitButtonSettings]
  implicit val encoder: Encoder[SubmitButtonSettings] = deriveEncoder[SubmitButtonSettings]

  def asJson(target: SubmitButtonSettings): String = Json.asJson(target)

  def fromJson(json: String): Option[SubmitButtonSettings] = Json.fromJson(json)
} 

//设置package包名称以及导入依赖的类
package org.http4s.akka

import io.circe.{Decoder, Encoder, Json}
import io.circe.parser._
import org.http4s.{Charset, DefaultCharset, UrlForm}
import org.http4s.websocket.WebsocketBits._
import play.twirl.api._


  implicit def circeableFrameFormat[A: Encoder : Decoder]: FrameFormatter[A] = jsonFrameFormatter.transform[A](
    Encoder[A].apply(_),
    Decoder[A].decodeJson(_).toTry.get
  )
  
  //=== TWIRL ===
  implicit val htmlFrameFormatter: FrameFormatter[Html] = stringFrameFormatter.transform(_.body, Html.apply)
  implicit val xmlFrameFormatter: FrameFormatter[Xml] = stringFrameFormatter.transform(_.body, Xml.apply)
  implicit val txtFrameFormatter: FrameFormatter[Txt] = stringFrameFormatter.transform(_.body, Txt.apply)
  implicit val javaScriptFrameFormatter: FrameFormatter[JavaScript] = stringFrameFormatter.transform(_.body, JavaScript.apply)
} 

//设置package包名称以及导入依赖的类
package swaggerblocks.extensions

import io.circe.yaml._
import io.circe.Encoder
import io.circe.syntax._
import swaggerblocks.internal.models.{ApiObjectSchema, ApiSchemaDefinition}

object yaml {
  implicit class ExampleExtension(schemaDef: ApiSchemaDefinition) {
    private val printer = Printer.spaces2.copy(
      preserveOrder = true,
      dropNullKeys = true
    )

    def withExample[T](obj: T)(implicit encoder: Encoder[T]): ApiSchemaDefinition =
      schemaDef.schema match {
        case s: ApiObjectSchema =>
          schemaDef.copy(
            schema = s.copy(
              example = Some(printer.pretty(obj.asJson))
            )
          )

        case _ =>
          schemaDef
      }
  }
} 

//设置package包名称以及导入依赖的类
package swaggerblocks.rendering.yaml

import io.circe.yaml.parser.parse
import io.circe.{Encoder, Json}
import swaggerblocks.internal.specModels._
import cats.syntax.either._

trait SpecEncoders {

  implicit val encodeSpecExample = new Encoder[SpecExample] {
    def apply(se: SpecExample): Json = {
      // Since we control the serialization this should be always valid
      parse(se.value).valueOr(throw _)
    }
  }

  implicit val encodeSpecValue = new Encoder[SpecValue] {
    def apply(sv: SpecValue): Json = sv match {
      case SpecValue.StringValue(v)    => Json.fromString(v)
      case SpecValue.IntValue(v)       => Json.fromInt(v)
      case SpecValue.BooleanValue(v)   => Json.fromBoolean(v)
      case SpecValue.ListValue(list)   => Json.fromValues(list.map(apply))
      case SpecValue.MapValue(mapping) => Json.fromFields(mapping.mapValues(apply))
    }
  }
} 

//设置package包名称以及导入依赖的类
package io.taig.akka.http.phoenix

import io.circe.{ Decoder, Encoder }

sealed case class Event( name: String )

object Event {
    object Close extends Event( "phx_close" )
    object Error extends Event( "phx_error" )
    object Join extends Event( "phx_join" )
    object Reply extends Event( "phx_reply" )
    object Leave extends Event( "phx_leave" )

    val all = Close :: Error :: Join :: Reply :: Leave :: Nil

    implicit val encoderEvent: Encoder[Event] = {
        Encoder[String].contramap( _.name )
    }

    implicit val decoderEvent: Decoder[Event] = {
        Decoder[String].map { name ?
            all.find( _.name == name ).getOrElse( Event( name ) )
        }
    }
} 

//设置package包名称以及导入依赖的类
package io.taig.akka.http.phoenix

import io.circe.{ Decoder, Encoder }
import cats.implicits._

case class Topic( name: String, identifier: Option[String] ) {
    def isSubscribedTo( topic: Topic ): Boolean = topic match {
        case Topic( `name`, `identifier` ) ? true
        case Topic( `name`, None )         ? true
        case _                             ? false
    }

    def serialize = name + identifier.map( ":" + _ ).getOrElse( "" )

    override def toString = s"Topic($serialize)"
}

object Topic {
    implicit val encoderTopic: Encoder[Topic] = {
        Encoder[String].contramap( _.serialize )
    }

    implicit val decoderTopic: Decoder[Topic] = {
        Decoder[String].emap { topic ?
            Either.fromOption( parse( topic ), "Invalid format" )
        }
    }

    val Phoenix = Topic( "phoenix" )

    val Pattern = "(\\w+)(?::(\\w+))?".r

    def apply( name: String, identifier: String ): Topic = {
        Topic( name, Some( identifier ) )
    }

    def apply( name: String ): Topic = Topic( name, None )

    def parse( topic: String ): Option[Topic] = {
        topic match {
            case Pattern( name, identifier ) ?
                Some( Topic( name, Option( identifier ) ) )
            case _ ? None
        }
    }
} 

//设置package包名称以及导入依赖的类
package com.lookout.ratelimitingfilter

import com.twitter.finagle.http.{Response, Status}
import com.twitter.finagle.RefusedByRateLimiter
import com.twitter.io.Buf
import com.twitter.logging.Logger
import io.circe.{Decoder, Encoder}
import io.circe.syntax._

final case class RefusedByRateLimiterError(
  message: String
) extends Exception(message) {
  def toResponse: Response = RefusedByRateLimiterError.toResponse(this)
}

object RefusedByRateLimiterError {
  val LOG = Logger.get(getClass)

  implicit val errorEncoder: Encoder[RefusedByRateLimiterError] =
    Encoder.forProduct1("message") { err => err.message }

  implicit val errorDecoder: Decoder[RefusedByRateLimiterError] =
    Decoder.forProduct1[String, RefusedByRateLimiterError]("message") {
      case (message: String) => RefusedByRateLimiterError(message)
    }

  def toResponse(error: RefusedByRateLimiterError): Response = {
    val response = Response(Status.TooManyRequests)
    val content = error.asJson.noSpaces
    LOG.info(content)
    response.content = Buf.Utf8(content)
    response.contentType = "application/json"
    response
  }
} 

//设置package包名称以及导入依赖的类
package kartograffel.shared.model

import eu.timepit.refined.W
import eu.timepit.refined.api.Refined
import eu.timepit.refined.numeric.Interval
import io.circe.generic.semiauto._
import io.circe.{Decoder, Encoder}
import io.circe.refined._
import kartograffel.shared.model.Position.{Latitude, Longitude}

final case class Position(
    latitude: Latitude,
    longitude: Longitude
)

object Position {
  type Latitude = Double Refined Interval.Closed[W.`-90.0`.T, W.`90.0`.T]

  type Longitude = Double Refined Interval.Closed[W.`-180.0`.T, W.`180.0`.T]

  implicit val positionDecoder: Decoder[Position] =
    deriveDecoder

  implicit val positionEncoder: Encoder[Position] =
    deriveEncoder
} 

//设置package包名称以及导入依赖的类
package kartograffel.shared.model

import io.circe.generic.semiauto.{deriveDecoder, deriveEncoder}
import io.circe.{Decoder, Encoder}

final case class Graffel(
    id: Graffel.Id,
    position: Position
)

object Graffel {
  final case class Id(value: String) extends AnyVal

  implicit val graffelIdDecoder: Decoder[Id] =
    Decoder.decodeString.map(Id.apply)

  implicit val graffelIdEncoder: Encoder[Id] =
    Encoder.encodeString.contramap(_.value)

  implicit val graffelDecoder: Decoder[Graffel] =
    deriveDecoder

  implicit val graffelEncoder: Encoder[Graffel] =
    deriveEncoder
} 

//设置package包名称以及导入依赖的类
package com.outr.arango.managed

import com.outr.arango.{ArangoCode, ArangoEdge, ArangoException, DocumentOption, Edge}
import com.outr.arango.rest.{CreateInfo, GraphResponse}
import io.circe.Encoder

import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global

abstract class EdgeCollection[T <: Edge with DocumentOption](override val graph: Graph,
                                                             override val name: String,
                                                             from: List[String],
                                                             to: List[String]) extends AbstractCollection[T] {
  private lazy val edge: ArangoEdge = graph.instance.edge(name)

  override def create(waitForSync: Boolean = false): Future[GraphResponse] = edge.create(from, to, waitForSync)
  override def delete(): Future[GraphResponse] = edge.delete(dropCollection = true)

  override def get(key: String): Future[Option[T]] = edge[T](key).map(_.edge).recover {
    case t: ArangoException if t.error.errorCode == ArangoCode.ArangoDocumentNotFound => None
  }

  override protected def insertInternal(document: T): Future[CreateInfo] = {
    edge.insert[T](document).map(_.edge)
  }

  override protected def updateInternal[M](key: String, modification: M)
                                          (implicit encoder: Encoder[M]): Future[CreateInfo] = {
    edge.modify[M](key, modification).map(_.edge)
  }

  override protected def replaceInternal(currentKey: String, document: T): Future[Unit] = {
    edge.replace[T](currentKey, document).map(_ => ())
  }

  override protected def deleteInternal(key: String): Future[Boolean] = edge.delete(key).map(_.removed)
}