Scala example source code file (ReferenceWrapper.scala)

This example Scala source code file (ReferenceWrapper.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

anyref, nosuchelementexception, proxy, reference, referencewithwrapper, referencewrapper, t

The ReferenceWrapper.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2006-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */


package scala.ref

/**
 *  @author Sean McDirmid
 */
trait ReferenceWrapper[+T <: AnyRef] extends Reference[T] with Proxy {
  val underlying: java.lang.ref.Reference[_ <: T]
  override def get = Option(underlying.get)
  def apply() = {
    val ret = underlying.get
    if (ret eq null) throw new NoSuchElementException
    ret
  }
  def clear() = underlying.clear()
  def enqueue = underlying.enqueue
  def isEnqueued = underlying.isEnqueued
  def self = underlying
}

/**
 *  @author Philipp Haller
 */
private trait ReferenceWithWrapper[T <: AnyRef] {
  val wrapper: ReferenceWrapper[T]
}