Lift Framework example source code file (WithParam.scala)

This example Lift Framework source code file (WithParam.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

comment, comment, dispatchit, dispatchsnippet, fix, fix, invalid, me, me, nodeseq, nodeseq, string, withparam, withparamvar

The Lift Framework WithParam.scala source code

/*
 * Copyright 2009-2011 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 builtin
package snippet

import scala.xml._
import scala.collection.immutable.{Map}
import net.liftweb.http._
import net.liftweb.common._

object WithParamVar extends RequestVar[Map[String, NodeSeq]](Map.empty)

object WithParam extends DispatchSnippet {

  def dispatch : DispatchIt = {
    case _ => render _
  }

  def render(kids: NodeSeq) : NodeSeq = {
    (for {
      ctx <- S.session ?~ ("FIX"+"ME: Invalid session")
      req <- S.request ?~ ("FIX"+"ME: Invalid request")
    } yield {
      val name: String = S.attr("name") openOr "main"
      val body = ctx.processSurroundAndInclude(PageName.get, kids)
       WithParamVar.atomicUpdate(_ + (name -> body))
       NodeSeq.Empty
    }) match {
      case Full(x) => x
      case Empty => Comment("FIX"+ "ME: session or request are invalid")
      case Failure(msg, _, _) => Comment(msg)
    }
  }

}