manhattancomparator.java

puzzle game with java.very good !

/*
 * Created on 22-okt-2004
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package logic;

import java.util.Comparator;


/** 
 * 
 * A Comparator that compares two PuzzleState s based on their manhattan distance
 *
 */
public class ManhattanComparator implements Comparator {

	
	 private PuzzleState target;
	 private int maxRowToControl;
	 
	 public ManhattanComparator(PuzzleState target)
	 {
	 	this(target, PuzzleState.NMBR_OF_ROWS);
	 }
	 public ManhattanComparator(PuzzleState doel, int maxRowToControl)
	 {
	 	this.target = doel;
	 	this.maxRowToControl = maxRowToControl;
	 }
	 
	/* (non-Javadoc)
	 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
	 */
	public int compare(Object obj1, Object obj2) {
		
		PuzzleState puzzleState1 = (PuzzleState)obj1;
		PuzzleState puzzleState2 = (PuzzleState)obj2;
		return puzzleState1.getManhattanDistance(target, maxRowToControl) - puzzleState2.getManhattanDistance(target, maxRowToControl);
	}
	public void setMaxRowToControl(int maxRowToControl)
	{
		this.maxRowToControl = maxRowToControl;
	}

}