Lift JSON Scala serializer for Enumeration

gistfile1.scala

import net.liftweb.json.JsonAST.{JObject, JField, JString, JValue}
import net.liftweb.json._
import net.liftweb.json.JsonAST.JField
import net.liftweb.json.JsonAST.JObject
import net.liftweb.json.JsonAST.JString
import net.liftweb.json.TypeInfo
import net.liftweb.json.MappingException

class EnumerationSerializer[T <: Enumeration#Value](enum: Enumeration, clazz: Class[T]) extends Serializer[T] {

  import JsonDSL._
  // def EnumerationClass[T] = classOf[T]

  override def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), T] = {
    case (TypeInfo(clazz, _), json) => json match {
      case JObject(List(JField(name, JString(value)))) => fetchEnumValue(value)
      case JString(value) => fetchEnumValue(value)
      case value => throw new MappingException("Can't convert " + value + " to " + clazz)
    }
  }

  override def serialize(implicit format: Formats): PartialFunction[Any, JValue] = {
    case expected if clazz.isInstance(expected) => expected.toString
  }

  private def fetchEnumValue(value: String): T = {
    enum.values.find(_.toString == value).getOrElse(throw new Exception("Invalid enum value => " + value)).asInstanceOf[T]
  }
}