/**
*
Java Diagram Package; An extremely flexible and fast multipurpose diagram
component for Swing.
Copyright (C) 2001 Eric Crahen <crahen@cse.buffalo.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package diagram;
import java.awt.Rectangle;
import java.util.Comparator;
/**
* @class FigureComparator
*
* @date 08-20-2001
* @author Eric Crahen
* @version 1.0
*
* Implement a comparator that can be used to compare various Figures to one
* another. It considers both the figures class and its bounds when making a
* comparision
*/
public class FigureComparator implements Comparator {
protected Rectangle r1 = new Rectangle();
protected Rectangle r2 = new Rectangle();
/**
* Compare two figures to one another
*
* @param Object
* @param Object
*
* @return int
*/
public int compare(Object o1, Object o2) {
Figure f1 = (Figure)o1;
Figure f2 = (Figure)o2;
// Check for equal reference
if(f1 == f2 || o1.equals(f2))
return 0;
// Check for different classes
Class c1 = f1.getClass();
Class c2 = f2.getClass();
if(c1 != c2) // Sort on class name
return c1.getName().compareTo(c2.getName());
// Same class, sort on bounds
r1 = (Rectangle)f1.getBounds2D(r1);
r2 = (Rectangle)f2.getBounds2D(r2);
// if(r1.hashCode() == r2.hashCode())
// return 0;
return (r1.hashCode() < r2.hashCode()) ? -1 : 1;
}
}