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Lift Framework example source code file (JValueGen.scala)

This example Lift Framework source code file (JValueGen.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

gen, gen, jarray, jfield, jfield, jobject, jvalue, jvalue, jvaluegen, node, nodeseq, xmlelem, xmlelem, xmlnode

The Lift Framework JValueGen.scala source code

 * Copyright 2009-2010 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package net.liftweb
package json

import org.scalacheck._
import Gen._
import Arbitrary.arbitrary

trait JValueGen {
  def genJValue: Gen[JValue] = frequency((5, genSimple), (1, wrap(genArray)), (1, wrap(genObject)))
  def genSimple: Gen[JValue] = oneOf(

  def genArray: Gen[JValue] = for (l <- genList) yield JArray(l)
  def genObject: Gen[JObject] = for (l <- genFieldList) yield JObject(l)

  def genList = Gen.containerOfN[List, JValue](listSize, genJValue)
  def genFieldList = Gen.containerOfN[List, JField](listSize, genField)
  def genField = for (name <- identifier; value <- genJValue; id <- choose(0, 1000000)) yield JField(name+id, value)

  def genJValueClass: Gen[Class[_ <: JValue]] = oneOf(
    JNull.getClass.asInstanceOf[Class[JValue]], JNothing.getClass.asInstanceOf[Class[JValue]], classOf[JInt], 
    classOf[JDouble], classOf[JBool], classOf[JString], classOf[JField], classOf[JArray], classOf[JObject])

  def listSize = choose(0, 5).sample.get

trait NodeGen {
  import Xml.{XmlNode, XmlElem}
  import scala.xml.{Node, NodeSeq, Text}

  def genXml: Gen[Node] = frequency((2, wrap(genNode)), (3, genElem))
  def genNode = for {
    name <- genName
    node <- Gen.containerOfN[List, Node](children, genXml) map { seq => new XmlNode(name, seq) }
  } yield node

  def genElem = for {
    name <- genName
    value <- arbitrary[String]
  } yield new XmlElem(name, value)

  def genName = frequency((2, identifier), (1, value("const")))
  private def children = choose(1, 3).sample.get

Other Lift Framework examples (source code examples)

Here is a short list of links related to this Lift Framework JValueGen.scala source code file:

my book on functional programming


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