scala.ref.PhantomReference

class PhantomReference[+T <: AnyRef] extends ReferenceWrapper[T]

Value Members From scala.Proxy

def equals(that: Any): Boolean

Compares the receiver object ( this ) with the argument object ( that ) for equivalence.

Any implementation of this method should be an equivalence relation :

  • It is reflexive: for any instance x of type Any , x.equals(x) should return true .
  • It is symmetric: for any instances x and y of type Any , x.equals(y) should return true if and only if y.equals(x) returns true .
  • It is transitive: for any instances x , y , and z of type Any if x.equals(y) returns true and y.equals(z) returns true , then x.equals(z) should return true .

If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to override hashCode to ensure that objects which are “equal” ( o1.equals(o2) returns true ) hash to the same scala.Int. ( o1.hashCode.equals(o2.hashCode) ).

  • that
    • the object to compare against this object for equality.
  • returns
    • true if the receiver object is equivalent to the argument; false otherwise.
  • Definition Classes
    • Proxy → Any

(defined at scala.Proxy)

Instance Constructors From scala.ref.PhantomReference

new PhantomReference(value: T, queue: ReferenceQueue[T])

(defined at scala.ref.PhantomReference)

Full Source:

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


package scala.ref

/**
 *  @author Sean McDirmid
 */
class PhantomReference[+T <: AnyRef](value: T, queue: ReferenceQueue[T]) extends ReferenceWrapper[T] {
  val underlying: java.lang.ref.PhantomReference[_ <: T] =
    new PhantomReferenceWithWrapper[T](value, queue, this)
}

/**
 *  @author Philipp Haller
 */
private class PhantomReferenceWithWrapper[T <: AnyRef](value: T, queue: ReferenceQueue[T], val wrapper: PhantomReference[T])
  extends java.lang.ref.PhantomReference[T](value, queue.underlying.asInstanceOf[java.lang.ref.ReferenceQueue[T]]) with ReferenceWithWrapper[T]