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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala
package collection
package mutable
import script._
/** This class is typically used as a mixin. It adds a subscription
* mechanism to the `Set` class into which this abstract
* class is mixed in. Class `ObservableSet` publishes
* events of the type `Message`.
*
* @author Matthias Zenger
* @version 1.0, 08/07/2003
* @since 1
*/
@deprecated("Observables are deprecated because scripting is deprecated.", "2.11.0")
trait ObservableSet[A] extends Set[A] with Publisher[Message[A] with Undoable]
{
type Pub <: ObservableSet[A]
abstract override def +=(elem: A): this.type = {
if (!contains(elem)) {
super.+=(elem)
publish(new Include(elem) with Undoable { def undo = -=(elem) })
}
this
}
abstract override def -=(elem: A): this.type = {
if (contains(elem)) {
super.-=(elem)
publish(new Remove(elem) with Undoable { def undo = +=(elem) })
}
this
}
abstract override def clear(): Unit = {
super.clear()
publish(new Reset with Undoable {
def undo(): Unit = throw new UnsupportedOperationException("cannot undo")
})
}
}
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