signature.scala

package controllers

import play.mvc._

case class Item(name: String)

object Sig extends Controller {

  // OK "/sig/index1?name=foo" => name is "foo" (@render)
  def index1(name: String) = stub_item match {
    case _ => render(name)
  }

  // NG "/sig/index2?name=foo" => name is null (@render)
  def index2(name: String) = stub_item match {
    case i:Item if i.name == name => render(i.name)
    case _ => render(name)
  }

  // OK "/sig/index3?name=foo" => name is "foo" (@render)
  def index3(name: String) {
    println("index3: name is " + name) // foo
    val x = name
    stub_item match {
      case i:Item if i.name == x => render(name)
      case _ => render(name)
    }
  }

  // NG "/sig/index4?name=foo" => name is null (@render)
  def index4(name: String) {
    println("index4: name is " + name) // null
    val x = name
    stub_item match {
      case i:Item if i.name == name => render(name)
      case _ => render(name)
    }
  }

  private def stub_item = new Item("foo")
}