Lift Framework example source code file (EnumSerializer.scala)

This example Lift Framework source code file (EnumSerializer.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lift Framework tags/keywords

can't, classmanifest, e, e, enumerationclass, enumerationclass, formats, jvalue, jvalue, mappingexception, partialfunction, typeinfo, value, value

The Lift Framework EnumSerializer.scala source code

/*
 * Copyright 2006-2010 WorldWide Conferencing, LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.liftweb
package json
package ext

class EnumSerializer[E <: Enumeration: ClassManifest](enum: E)
  extends json.Serializer[E#Value] {
  import JsonDSL._

  val EnumerationClass = classOf[E#Value]

  def deserialize(implicit format: Formats):
    PartialFunction[(TypeInfo, JValue), E#Value] = {
      case (TypeInfo(EnumerationClass, _), json) => json match {
        case JInt(value) if (value <= enum.maxId) => enum(value.toInt)
        case value => throw new MappingException("Can't convert " +
          value + " to "+ EnumerationClass)
      }
    }

  def serialize(implicit format: Formats): PartialFunction[Any, JValue] = {
    case i: E#Value => i.id
  }
}

class EnumNameSerializer[E <: Enumeration: ClassManifest](enum: E)
  extends json.Serializer[E#Value] {
  import JsonDSL._

  val EnumerationClass = classOf[E#Value]

  def deserialize(implicit format: Formats):
    PartialFunction[(TypeInfo, JValue), E#Value] = {
      case (TypeInfo(EnumerationClass, _), json) => json match {
        case JString(value) if (enum.values.exists(_.toString == value)) =>
          enum.withName(value)
        case value => throw new MappingException("Can't convert " +
          value + " to "+ EnumerationClass)
      }
    }

  def serialize(implicit format: Formats): PartialFunction[Any, JValue] = {
    case i: E#Value => i.toString
  }
}