Scala example source code file (bug247.scala)

This example Scala source code file (bug247.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

b, boolean,equal:, empty, map, map, mapfactory, order, tree, treemap, treemap, treemapfactory, treemapfactory, value, value

The Scala bug247.scala source code

class Order[t](less:(t,t) => Boolean,equal:(t,t) => Boolean) {}

trait Map[A, B] extends scala.collection.Map[A, B] {
  val factory:MapFactory[A]
}
abstract class MapFactory[A] {
  def Empty[B]:Map[A,B];
}

class TreeMapFactory[KEY](newOrder:Order[KEY]) extends MapFactory[KEY] {
  val order = newOrder;
  def Empty[V] = new TreeMap[KEY,V](new TreeMapFactory[KEY](order));
}

class Tree[KEY,Entry](order:Order[KEY]) { 
  def size =0;
}

class TreeMap[KEY,VALUE](_factory:TreeMapFactory[KEY]) extends Tree[KEY,Pair[KEY,VALUE]](_factory.order) with scala.collection.DefaultMap[KEY, VALUE] with Map[KEY, VALUE] {
  val factory = _factory
  val order = _factory.order;
  def this(newOrder:Order[KEY]) = this(new TreeMapFactory[KEY](newOrder));
  def get(key:KEY) = null;
  def iterator:Iterator[Pair[KEY,VALUE]] = null;
  override def size = super[Tree].size
}