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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection.mutable
import generic._
@serializable
class HashMap[A, B] extends Map[A, B] with MutableMapTemplate[A, B, HashMap[A, B]] with HashTable[A] with DefaultMapModel[A, B] {
override def empty: HashMap[A, B] = HashMap.empty[A, B]
override def mapBuilder[A, B]: Builder[(A, B), HashMap[A, B]] = HashMap.newBuilder[A, B]
def remove(key: A): Option[B] = removeEntry(key) match {
case Some(e) => Some(e.value)
case None => None
}
override def clear() = super.clear()
override def size: Int = super[HashTable].size
}
/** This class implements mutable maps using a hashtable.
*
* @author Matthias Zenger
* @author Martin Odersky
* @version 2.8
*/
object HashMap extends MutableMapFactory[HashMap] {
type Coll = HashMap[_, _]
implicit def builderFactory[A, B]: BuilderFactory[(A, B), HashMap[A, B], Coll] = new BuilderFactory[(A, B), HashMap[A, B], Coll] { def apply(from: Coll) = from.mapBuilder[A, B] }
def empty[A, B]: HashMap[A, B] = new HashMap[A, B]
}
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