Lift Framework example source code file (IntField.scala)

This example Lift Framework source code file (IntField.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, field, intfield, inttypedfield, jint, jint, jnothing, jvalue, jvalue, ownertype, ownertype, record, string

The Lift Framework IntField.scala source code

/*
 * Copyright 2007-2011 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 record 
package field 

import scala.xml._
import net.liftweb.common._
import net.liftweb.http.S
import net.liftweb.json.JsonAST.{JInt, JNothing, JNull, JValue}
import net.liftweb.util._
import Helpers._
import S._

trait IntTypedField extends NumericTypedField[Int] {
  def setFromAny(in: Any): Box[Int] = setNumericFromAny(in, _.intValue)

  def setFromString(s: String): Box[Int] = s match {
    case "" if optional_? => setBox(Empty)
    case _                => setBox(tryo(java.lang.Integer.parseInt(s)))
  }

  def defaultValue = 0

  def asJValue: JValue = valueBox.map(i => JInt(BigInt(i))) openOr (JNothing: JValue)
  def setFromJValue(jvalue: JValue): Box[Int] = jvalue match {
    case JNothing|JNull if optional_? => setBox(Empty)
    case JInt(i)                      => setBox(Full(i.intValue))
    case other                        => setBox(FieldHelpers.expectedA("JInt", other))
  }
}

class IntField[OwnerType <: Record[OwnerType]](rec: OwnerType)
  extends Field[Int, OwnerType] with MandatoryTypedField[Int] with IntTypedField {

  def owner = rec

  def this(rec: OwnerType, value: Int) = {
    this(rec)
    set(value)
  }
}

class OptionalIntField[OwnerType <: Record[OwnerType]](rec: OwnerType)
  extends Field[Int, OwnerType] with OptionalTypedField[Int] with IntTypedField {

  def owner = rec

  def this(rec: OwnerType, value: Box[Int]) = {
    this(rec)
    setBox(value)
  }
}