/**
 * @author Gary Yngve
 * @version 2/10/06
 */

import java.util.Comparator;

public interface BasicOrderedSet extends BasicSet
{
  
  /**
   * Returns a set that has a restricted range of the original set.
   * @param fromElement.  Lower bound, included.
   * @param toElement. Upper bound, excluded.
   * @return BasicOrderedSet with restricted range.
   */
  public BasicOrderedSet subSet(Object fromElement, Object toElement);

  /**
   * Returns the comparator for the set.
   * @return the Comparator that the set uses to order its elements.
   */
  public Comparator comparator();

}