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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2006-2008, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://www.scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection.jcl
/** <p>
* A map that is backed by a Java weak hash map, whose keys are maintained
* as weak references.
* </p>
* <p>
* Because keys are weak references, the garbage collector can collect
* them if they are not referred to elsewhere.
* </p>
* <p>
* Useful for implementing caches.
* </p>
*
* @author Sean McDirmid
*/
class WeakHashMap[K, E](override val underlying: java.util.WeakHashMap[K, E]) extends MapWrapper[K, E] {
def this() = this(new java.util.WeakHashMap[K, E])
override def clone: WeakHashMap[K, E] =
throw new CloneNotSupportedException("The underlying map doesn't implement the Cloneable interface")
}
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