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Lift Framework example source code file (DBRefField.scala)

This example Lift Framework source code file (DBRefField.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

box, box, dbref, dbref, empty, empty, full, full, jvalue, ownertype, reftype, seq, str, string

The Lift Framework DBRefField.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
package record
package field

import net.liftweb.common.{Box, Empty, Failure, Full}
import net.liftweb.http.js.JE.Str
import net.liftweb.json.JsonAST.{JNothing, JObject, JValue}
import net.liftweb.record.{Field, MandatoryTypedField, Record}
import scala.xml.NodeSeq

import com.mongodb.{BasicDBObject, BasicDBObjectBuilder, DBObject, DBRef}
import com.mongodb.util.JSON
import org.bson.types.ObjectId

/*
* Field for storing a DBRef
*/
class DBRefField[OwnerType <: BsonRecord[OwnerType], RefType <: MongoRecord[RefType]](rec: OwnerType, ref: RefType)
  extends Field[DBRef, OwnerType] with MandatoryTypedField[DBRef] {

  /*
  * get the referenced object
  */
  def obj = synchronized {
    if (!_calcedObj) {
      _calcedObj = true
      this._obj = ref.meta.findAny(value.getId)
    }
    _obj
  }

  def cached_? : Boolean = synchronized { _calcedObj }

  def primeObj(obj: Box[RefType]) = synchronized {
    _obj = obj
    _calcedObj = true
  }

  private var _obj: Box[RefType] = Empty
  private var _calcedObj = false

  def asJs = Str(toString)

  def asJValue = (JNothing: JValue) // not implemented

  def setFromJValue(jvalue: JValue) = Empty // not implemented

  def asXHtml = <div>
def defaultValue = new DBRef(null, null, null) def setFromAny(in: Any): Box[DBRef] = in match { case ref: DBRef => Full(set(ref)) case Some(ref: DBRef) => Full(set(ref)) case Full(ref: DBRef) => Full(set(ref)) case seq: Seq[_] if !seq.isEmpty => seq.map(setFromAny).apply(0) case (s: String) :: _ => setFromString(s) case null => Full(set(null)) case s: String => setFromString(s) case None | Empty | Failure(_, _, _) => Full(set(null)) case o => setFromString(o.toString) } // assume string is json def setFromString(in: String): Box[DBRef] = { val dbo = JSON.parse(in).asInstanceOf[BasicDBObject] MongoDB.use(ref.meta.mongoIdentifier) ( db => { val id = dbo.get("$id").toString ObjectId.isValid(id) match { case true => Full(set(new DBRef(db, dbo.get("$ref").toString, new ObjectId(id)))) case false => Full(set(new DBRef(db, dbo.get("$ref").toString, id))) } }) } def toForm: Box[NodeSeq] = Empty def owner = rec }

Other Lift Framework examples (source code examples)

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