Lift Framework example source code file (JsonObject.scala)

This example Lift Framework source code file (JsonObject.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

basedocument, basedocument, formats, formats, jobject, jobject, jsonobject, jsonobjectmeta, jsonobjectmeta, manifest, mongoref, objectid, string

The Lift Framework JsonObject.scala source code

/*
* Copyright 2010-2011 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 mongodb 

import json.Formats
import json.JsonAST.JObject

import scala.reflect.Manifest

import org.bson.types.ObjectId

/*
* These traits provide lift-json related conveniece methods for case classes
* and their companion objects. Used by MongoDocument, JsonObjectField, and
* MongoJsonObjectListField
*/
trait JsonObject[BaseDocument] {
  self: BaseDocument =>

  def meta: JsonObjectMeta[BaseDocument]

  // convert class to a json value
  def asJObject()(implicit formats: Formats): JObject = meta.toJObject(this)

}

class JsonObjectMeta[BaseDocument](implicit mf: Manifest[BaseDocument]) {

  import net.liftweb.json.Extraction._

  // create an instance of BaseDocument from a JObject
  def create(in: JObject)(implicit formats: Formats): BaseDocument =
    extract(in)(formats, mf)

  // convert class to a JObject
  def toJObject(in: BaseDocument)(implicit formats: Formats): JObject =
    decompose(in)(formats).asInstanceOf[JObject]
}

/*
* Case class for a db reference (foreign key). To be used in a JsonObject
* ref = collection name, id is the value of the reference
* Only works with ObjectIds.
*/
case class MongoRef(ref: String, id: ObjectId)