linkedlist.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 33 行

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2006-2007, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |                                         **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

// $Id: LinkedList.scala 13908 2008-02-06 19:27:01Z dubochet $

package scala.collection.jcl;

/** Creates a buffer backed by a Java linked list. Includes additional
 *  peek/poll/removeFirst/removeLast APIs that are useful in implementing
 *  queues and stacks.
 *
 *  @author Sean McDirmid
 */
class LinkedList[A](override val underlying : java.util.LinkedList[A]) extends BufferWrapper[A]  {
  def this() = this(new java.util.LinkedList[A]);
  override def elements = super[BufferWrapper].elements;
  override def add(idx : Int, a : A) =
    if (idx == 0) underlying.addFirst(a);
    else super.add(idx, a);
  //def peek = underlying.peek.asInstanceOf[A];
  //def poll = underlying.poll.asInstanceOf[A];
  //def removeFirst = underlying.removeFirst.asInstanceOf[A];
  //def removeLast  = underlying.removeLast.asInstanceOf[A];
  
  override def clone: LinkedList[A] =
    new LinkedList[A](underlying.clone().asInstanceOf[java.util.LinkedList[A]])
}