Scala DefaultScalaModule类代码示例

//设置package包名称以及导入依赖的类
package modules

import javax.inject.{Inject, Provider, Singleton}

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import play.api.inject.{ApplicationLifecycle, Module}
import play.api.{Configuration, Environment}
import play.libs.Json

import scala.concurrent.Future

class CustomObjectMapperModule extends Module {

  def bindings(environment: Environment, configuration: Configuration) = Seq(
    bind[ObjectMapper].toProvider[ObjectMapperProvider].eagerly()
  )
}

@Singleton
class ObjectMapperProvider @Inject() (lifecycle: ApplicationLifecycle) extends Provider[ObjectMapper] {

  lazy val get : ObjectMapper = {
    val objectMapper = Json.newDefaultMapper()
    objectMapper.registerModule(DefaultScalaModule)

    Json.setObjectMapper(objectMapper)
    lifecycle.addStopHook { () =>
      Future.successful(Json.setObjectMapper(null))
    }
    objectMapper
  }
} 

//设置package包名称以及导入依赖的类
import com.fasterxml.jackson.databind.{DeserializationFeature, ObjectMapper}
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule



object JsonUtil {
  val mapper = new ObjectMapper() with ScalaObjectMapper
  mapper.registerModule(DefaultScalaModule)
  mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)

  def toJson(value: Map[Symbol, Any]): String = {
    toJson(value map { case (k,v) => k.name -> v})
  }

  def toJson(value: Any): String = {
    mapper.writeValueAsString(value)
  }

  def toMap[V](json:String)(implicit m: Manifest[V]) = fromJson[Map[String,V]](json)

  def fromJson[T](json: String)(implicit m : Manifest[T]): T = {
    mapper.readValue[T](json)
  }
}

object MarshallableImplicits {

  implicit class Unmarshallable(unMarshallMe: String) {
    def toMap: Map[String,Any] = JsonUtil.toMap(unMarshallMe)
    //def toMapOf[V]()(implicit m: Manifest[V]): Map[String,V] = JsonUtil.toMapOf[V](unMarshallMe)
    def fromJson[T]()(implicit m: Manifest[T]): T =  JsonUtil.fromJson[T](unMarshallMe)
  }

  implicit class Marshallable[T](marshallMe: T) {
    def toJson: String = JsonUtil.toJson(marshallMe)
  }
} 

//设置package包名称以及导入依赖的类
package db

import java.util.{Date, UUID}

import com.fasterxml.jackson.databind.{SerializationFeature, ObjectMapper}
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
import tools._
import common._
import Tool._

class BaseBDBEntity[+Self <: BaseBDBEntity[Self]](tableName: String) extends BDBEntity(tableName) {
  def toJson: String = {
    BaseBDBEntity.map.writeValueAsString(this)
  }

  def fromJson(json: String): Self = {
    BaseBDBEntity.map.readValue(json, this.getClass).asInstanceOf[Self]
  }

  //????????????
  def changeUpdateBean(): Self = {
    fromJson(toJson)
  }

  override def queryById(id: String, fields: String*): Option[Self] = {
    super.queryById(id,fields:_*) map (_.asInstanceOf[Self])
  }
  override def queryByIds(idName: String, ids: List[Long], fields: String*): List[Self] = {
    super.queryByIds(idName,ids,fields:_*) map (_.asInstanceOf[Self])
  }

  //????????????
  override def queryPage(where: String, pageNum: Int, pageSize: Int, fields: String*):List[Self] = {
    val  list = super.queryPage(where, pageNum, pageSize,fields: _*)
     list map (_.asInstanceOf[Self])
  }

}

object BaseBDBEntity {
  private val map = new ObjectMapper() with ScalaObjectMapper
  map.registerModule(DefaultScalaModule)
  map.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false)
}

//??????
class LoanData(val id:String=UUID.randomUUID().toString,val Title:String="",val text:String="",val createTime:Date=new Date())extends BaseBDBEntity[LoanData]("LoanData") 

//设置package包名称以及导入依赖的类
package de.stema.util

import javax.inject.Singleton

import com.fasterxml.jackson.annotation.JsonInclude
import com.fasterxml.jackson.databind.{DeserializationFeature, ObjectMapper, SerializationFeature}
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
import de.stema.pullrequests.dto.PullRequestDTO

import scala.reflect.ClassTag
import scala.util.{Failure, Success, Try}

@Singleton
class JsonObjectMapper {
  private lazy val mapper = new ObjectMapper with ScalaObjectMapper
  mapper.registerModule(DefaultScalaModule)
  mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
  mapper.configure(SerializationFeature.INDENT_OUTPUT, true)
  mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY)
  mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)

  def getInstance[T](json: String)(implicit ct: ClassTag[T]): T =
    Try {
      mapper.readValue(json, ct.runtimeClass).asInstanceOf[T]
    } match {
      case Success(instance) => instance
      case Failure(e) => throw new IllegalStateException(s"Error during parsing of '$json'", e)
    }

  def getInstances[T](json: String)(implicit ct: ClassTag[T]): Seq[PullRequestDTO] =
    Try {
      mapper.readValue[Seq[PullRequestDTO]](json)
    } match {
      case Success(instances) => instances
      case Failure(e) => throw new IllegalStateException(s"Error during parsing of '$json'", e)
    }
} 

//设置package包名称以及导入依赖的类
// Copyright (c) 2017 Grier Forensics. All Rights Reserved.

package com.grierforensics.greatdane.connector

import java.net.URI
import java.nio.charset.StandardCharsets
import java.nio.file.{Files, Paths}

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import org.apache.commons.io.IOUtils
import org.apache.http.HttpHeaders
import org.apache.http.client.methods.HttpPost
import org.apache.http.entity.StringEntity
import org.apache.http.impl.client.HttpClients


object ProvisionUser {
  def main(args: Array[String]): Unit = {

    def die = {
      println("Usage: provision-user <email-address> [<certificate file>]")
      sys.exit(1)
    }
    val (emailAddress, certPem) = args.toList match {
      case email :: tail => tail match {
        case Nil => (email, "")
        case certFile :: Nil => (email, new String(Files.readAllBytes(Paths.get(certFile)), StandardCharsets.UTF_8))
        case _ => die
      }
      case _ => die
    }

    val client = HttpClients.createDefault()
    val uri = new URI(s"http://${Settings.Host}:${Settings.Port}/api/v1/user/$emailAddress")
    val post = new HttpPost(uri)
    post.addHeader(HttpHeaders.CONTENT_TYPE, "application/json")
    post.addHeader(HttpHeaders.AUTHORIZATION, Settings.ApiKey)
    println(post.toString)

    val req = ProvisionRequest(None, if (certPem.length > 0) Some(Seq(certPem)) else None)
    val mapper = new ObjectMapper().registerModule(DefaultScalaModule)
    val json = mapper.writeValueAsString(req)
    println(json)

    post.setEntity(new StringEntity(json))

    val resp = client.execute(post)
    try {
      val entity = resp.getEntity
      println(resp.getStatusLine.getStatusCode, resp.getStatusLine.getReasonPhrase)
      println(IOUtils.toString(entity.getContent, StandardCharsets.UTF_8))
    } finally {
      resp.close()
    }

  }
} 

//设置package包名称以及导入依赖的类
package util

import java.io.StringWriter

import com.fasterxml.jackson.databind.{DeserializationFeature, ObjectMapper}
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper

import scala.reflect.{ClassTag, Manifest}

object JsonUtil {

  val mapper = new ObjectMapper() with ScalaObjectMapper
  mapper.registerModule(DefaultScalaModule)
  mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)

  def toJson[T](data: T): String = {
    val out = new StringWriter()
    mapper.writeValue(out, data)
    out.toString
  }

  def fromJson[T: ClassTag](json: String)(implicit m: Manifest[T]): T =
    mapper.readValue[T](json)
} 

//设置package包名称以及导入依赖的类
package controllers

import scala.collection.JavaConverters._
import com.fasterxml.jackson.databind.{ ObjectMapper, JsonNode }
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import play.api.Play
import sys.process._

case class Truck (
  name: String,
  address: String,
  cuisine: List[String],
  url: String) {
  override def toString: String = s"""$name (${cuisine.mkString(",")}) @ $address [$url]"""
}

object Truck {
  def newObjectMapper: ObjectMapper = {
    val m = new ObjectMapper()
    m.registerModule(DefaultScalaModule)
  }

  private[Truck] lazy val mapper = newObjectMapper

  val defaultLat = Play.maybeApplication.flatMap(_.configuration.getDouble("foodtrucks.latitude")).getOrElse(0.0)
  val defaultLon = Play.maybeApplication.flatMap(_.configuration.getDouble("foodtrucks.longitude")).getOrElse(0.0)

  def apply(jsonNode: JsonNode): Truck = {
    val info = jsonNode.get("obj")

    Truck(
      info.get("name").asText,
      info.get("last_seen").get("address").asText,
      info.get("cuisine").elements.asScala.map(_.asText).toList,
      info.get("url").asText
    )
  }

  def listAll(lat: Double = defaultLat, lon: Double = defaultLon): List[Truck] = {
    val result = Seq("curl", "-XGET", s"http://nyctruckfood.com/api/trucks/search?q=$lat,$lon").!!
    mapper.readTree(result).elements.asScala.map(Truck(_)).toList
  }
} 

//设置package包名称以及导入依赖的类
package services.json

import com.fasterxml.jackson.databind.{DeserializationFeature, ObjectMapper}
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper

object JsonMarshaller {
  val mapper = new ObjectMapper with ScalaObjectMapper
  mapper.registerModule(DefaultScalaModule)
  mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)

  def toJson(value: Any): String = {
    mapper.writeValueAsString(value)
  }

  def toMap[V](json:String)(implicit m: Manifest[V]) = fromJson[Map[String,V]](json)

  def fromJson[T](json: String)(implicit m : Manifest[T]): T = {
    mapper.readValue[T](json)
  }
}

object MarshallableImplicits {

  implicit class Unmarshallable(unMarshallMe: String) {
    def toMapOf[V]()(implicit m: Manifest[V]): Map[String,V] = JsonMarshaller.toMap[V](unMarshallMe)
    def fromJson[T]()(implicit m: Manifest[T]): T =  JsonMarshaller.fromJson[T](unMarshallMe)
  }

  implicit class Marshallable[T](marshallMe: T) {
    def toJson: String = JsonMarshaller.toJson(marshallMe)
  }
} 

//设置package包名称以及导入依赖的类
package org.styx.mongo

import java.util.concurrent.Executors

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import org.styx.bank.example.events._
import org.styx.bank.example.state.BankAccount
import org.styx.handler.{EventFetcher, EventHandler}
import org.styx.model.Event

import scala.concurrent.ExecutionContext


object BankAccountEventHandler {
  implicit val ec = ExecutionContext.fromExecutor(Executors.newFixedThreadPool(30))

  val mapper = new ObjectMapper
  mapper.registerModule(DefaultScalaModule)

  def converter: MongoDBEvent => Event[BankAccount] = { mongoDBEvent =>
    val event = mongoDBEvent match {
      case MongoDBEvent("BankAccountCreated", eventDate, version, _, _) => BankAccountCreated(version, eventDate)
      case MongoDBEvent("BankAccountClosed", eventDate, version, _, _) => BankAccountClosed(version, eventDate)
      case MongoDBEvent("OwnerChanged", eventDate, version, _, _) => OwnerChanged(version, eventDate)
      case MongoDBEvent("DepositPerformed", eventDate, version, _, _) => DepositPerformed(version, eventDate)
      case MongoDBEvent("WithdrawalPerformed", eventDate, version, _, _) => WithdrawalPerformed(version, eventDate)
    }

    event.data = mapper.readValue(mongoDBEvent.data.toJson(), classOf[Map[String, Any]])
    event
  }

  implicit val eventHandler: EventHandler[BankAccount] with EventFetcher[BankAccount] = MongoDBEventHandlerFetcher(MongoD.collection, mapper, converter)
} 

//设置package包名称以及导入依赖的类
package com.groupon.dse.kafka.topic

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule


object TopicUtils {

  def extractTopicListFromJson(json: String): List[TopicAndMetadata] = {
    val mapper = new ObjectMapper()
    mapper.registerModule(DefaultScalaModule)
    //The top level "topics" key is mapped to a list of [[TopicAndMetadata]] objects
    val contentMap = mapper.readValue(json, classOf[Map[String, List[Map[String, AnyRef]]]])

    val topics = contentMap.getOrElse("topics", List.empty)

    val topicList = topics.map(topicMap => {
      val topic = topicMap.getOrElse("name", "")
      val metadata = topicMap.getOrElse("metadata", Map.empty)
      TopicAndMetadata(topic.toString, metadata.asInstanceOf[Map[String, AnyRef]])
    }).filterNot(_.name.isEmpty)
    topicList
  }
} 

//设置package包名称以及导入依赖的类
package moe.pizza.zkapi

import java.net.URI

import com.fasterxml.jackson.databind.{DeserializationConfig, ObjectMapper}
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import moe.pizza.zkapi.zkillboard.Killmail
import org.eclipse.jetty.websocket.api.{WebSocketListener, Session, WebSocketAdapter}
import org.eclipse.jetty.websocket.client.WebSocketClient
import org.slf4j.{LoggerFactory, Logger}

import scala.concurrent.duration._



object WebsocketFeed {
  def main (args: Array[String]) {
    val logger = LoggerFactory.getLogger("main")
    val ws = createClient("ws://ws.eve-kill.net/kills", {s: Killmail => logger.info(s.toString)})
    ws.start()
    Thread.sleep(10.seconds.toMillis)
  }


  def createClient(url: String, onrecv: (Killmail => Unit)): WebSocketClient = {

    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)

    val logger = LoggerFactory.getLogger("websockets")

    class EKWSClientSocket(callback: (Killmail => Unit)) extends WebSocketAdapter {

      override def onWebSocketText(message: String): Unit = {
        if (message.startsWith("{")) {
          val kill = OM.readValue(message, classOf[zkillboard.Killmail])
          callback(kill)
        }
      }
    }

    val ws = new WebSocketClient()
    ws.start()
    ws.connect(new EKWSClientSocket(onrecv), URI.create(url))
    ws
  }

} 

//设置package包名称以及导入依赖的类
package moe.pizza.zkapi

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import moe.pizza.zkapi.StatsTypes.SuperPilot
import org.scalatest.{FlatSpec, MustMatchers}

import scala.io.Source

class RedisQSpec extends FlatSpec with MustMatchers {

  "redisq responses" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/redisq.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[RedisQTypes.RedisQResponse](json, classOf[RedisQTypes.RedisQResponse])
    r.payload.isDefined must equal(true)
    r.payload.get.killID must equal(51738685)
  }

  "redisq responses 2" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/redisq2.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[RedisQTypes.RedisQResponse](json, classOf[RedisQTypes.RedisQResponse])
    r.payload.isDefined must equal(true)
    r.payload.get.killID must equal(51738559)
  }

  "redisq responses 3" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/redisq3.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[RedisQTypes.RedisQResponse](json, classOf[RedisQTypes.RedisQResponse])
    r.payload.isDefined must equal(false)
  }

  "redisq responses 4, attacker with faction" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/redisq4_attackerwithfaction.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[RedisQTypes.RedisQResponse](json, classOf[RedisQTypes.RedisQResponse])
    r.payload.isDefined must equal(true)
    val factionedattacker = r.payload.get.killmail.attackers.find(_.faction.isDefined)
    factionedattacker.get.faction.get.name must equal("Blood Raider Covenant")
  }

  "redisq responses 5, victim with faction" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/redisq5_victimwithfaction.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[RedisQTypes.RedisQResponse](json, classOf[RedisQTypes.RedisQResponse])
    r.payload.isDefined must equal(true)
    r.payload.get.killmail.victim.faction.get.name must equal("Gallente Federation")
  }



} 

//设置package包名称以及导入依赖的类
package moe.pizza.zkapi

import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import moe.pizza.zkapi.StatsTypes.SuperPilot
import org.scalatest.{MustMatchers, FlatSpec}

import scala.io.Source


class StatsSpec extends FlatSpec with MustMatchers {

  "alliance stats" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/alliancestats.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[StatsTypes.AllianceInfo](json, classOf[StatsTypes.AllianceInfo])
    val superpilots = r.supers.supercarriers.data ++ r.supers.titans.data
    superpilots.size must equal(199)
    superpilots.head must equal(new SuperPilot(105,93260759,"Doctor Chalke"))
  }

  "alliance stats 2" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/alliancestats2.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[StatsTypes.AllianceInfo](json, classOf[StatsTypes.AllianceInfo])
    val superpilots = r.getSupers ++ r.getTitans
    superpilots.isEmpty must equal(true)
  }

  "alliance stats 3" should "be parsed" in {
    val json = Source.fromInputStream(getClass.getResourceAsStream("/alliancestats3.json")).getLines().mkString("\n")
    val OM = new ObjectMapper()
    OM.registerModule(DefaultScalaModule)
    val r = OM.readValue[StatsTypes.AllianceInfo](json, classOf[StatsTypes.AllianceInfo])
    val superpilots = r.getSupers ++ r.getTitans
    println(superpilots)
  }

} 

//设置package包名称以及导入依赖的类
package config

import com.fasterxml.jackson.annotation.JsonInclude
import com.fasterxml.jackson.databind.{DeserializationFeature, ObjectMapper}
import com.fasterxml.jackson.dataformat.javaprop.JavaPropsMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule

object JacksonMapper extends ObjectMapper {
  configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true)
  registerModule(DefaultScalaModule)
  setSerializationInclusion(JsonInclude.Include.NON_ABSENT)
}


// Instead of converting to/from JSON, this converts to/from nested key/value properties.
object JacksonPropertyMapper extends JavaPropsMapper {
  configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true)
  registerModule(DefaultScalaModule)
  setSerializationInclusion(JsonInclude.Include.NON_ABSENT)

  def productToKeyVals(p: Product): List[(String, String)] = {
    // This is a naive two-stage algorithm that works simply. Maybe it could be improved later.
    val props = writeValueAsString(p)
    val lines = props.split('\n')
    val keyVals =
      for (line <- lines
           if line.length > 1) yield {
        divide(line, '=')
      }
    keyVals.toList
  }

  
  private def divide(s: String, c: Char): (String, String) = {
    val i = s.indexOf(c)
    if (i < 0) s -> ""
    else {
      val w1 = s.substring(0, i)
      val rest = s.substring(i + 1)
      w1 -> rest
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.flipkart.connekt.receptors.wire

import akka.http.scaladsl.marshalling.{PredefinedToEntityMarshallers, ToEntityMarshaller}
import akka.http.scaladsl.model.MediaTypes
import akka.http.scaladsl.unmarshalling.{FromEntityUnmarshaller, PredefinedFromEntityUnmarshallers}
import com.fasterxml.jackson.databind.{DeserializationFeature, ObjectMapper}
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
import com.flipkart.connekt.receptors.wire.GenericJsonSupport._
import scala.collection.mutable
import scala.reflect.ClassTag


object GenericJsonSupport {

  val jacksonModules = Seq(DefaultScalaModule)

  val mapper = new ObjectMapper() with ScalaObjectMapper
  mapper.registerModules(jacksonModules: _*)
  mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)

  val m: mutable.Map[Class[_], ToEntityMarshaller[_]] = mutable.Map.empty[Class[_], ToEntityMarshaller[_]]
  val um: mutable.Map[Class[_], FromEntityUnmarshaller[_]] = mutable.Map.empty[Class[_], FromEntityUnmarshaller[_]]
}

trait JsonToEntityMarshaller extends PredefinedToEntityMarshallers {

  implicit def findMarshaller[T](implicit cTag: ClassTag[T]): ToEntityMarshaller[T] =
    m.getOrElseUpdate(cTag.runtimeClass, genericMarshaller[T]).asInstanceOf[ToEntityMarshaller[T]]

  def genericMarshaller[T]: ToEntityMarshaller[T] =
    stringMarshaller(MediaTypes.`application/json`)
      .compose[T](mapper.writeValueAsString)
}

trait JsonFromEntityUnmarshaller extends PredefinedFromEntityUnmarshallers {

  implicit def findUnmarshaller[T](implicit cTag: ClassTag[T]): FromEntityUnmarshaller[T] =
    um.getOrElseUpdate(cTag.runtimeClass, genericUnmarshaller[T](cTag)).asInstanceOf[FromEntityUnmarshaller[T]]

  def genericUnmarshaller[T](cTag: ClassTag[T]): FromEntityUnmarshaller[T] =
    stringUnmarshaller.forContentTypes(MediaTypes.`application/json`)
      .map(mapper.readValue(_, cTag.runtimeClass).asInstanceOf[T])
}