/*
PseudoCode Interpreted Language (PCIL):  Part of the algoviz@vt collection of algorithm visualizations.
Copyright (C) 2008  Brandon Malone, Frank Hadlock

This file is part of the PseudoCode Interpreted Language.

PseudoCode Interpreted Language 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 3 of the License,
or (at your option) any later version.

PseudoCode Interpreted Language 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
PseudoCode Interpreted Language.  If not, see
<http://www.gnu.org/licenses/>.
*/

/*
 * PrimitivePriorityQueueElementComparator.java
 *
 * Created on March 15, 2008, 12:21 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package dynamicmvc;

/**
 *
 * @author Brandon
 */
public class PrimitivePriorityQueueElementComparator implements java.util.Comparator<PrimitivePointer> {
    
    public static PrimitivePriorityQueueElementComparator instance;
    
    public static PrimitivePriorityQueueElementComparator getInstance() {
        if (instance == null) {
            instance = new PrimitivePriorityQueueElementComparator();
        }
        
        return instance;
    }
    
    /** Creates a new instance of PrimitivePriorityQueueElementComparator */
    public PrimitivePriorityQueueElementComparator() {
    }
    
    public int compare(PrimitivePointer o1, PrimitivePointer o2) {
        PrimitivePriorityQueueElement e1 = (PrimitivePriorityQueueElement)o1.dereference();
        PrimitivePriorityQueueElement e2 = (PrimitivePriorityQueueElement)o2.dereference();
        
        return e1.compareTo(e2);
    }
    
}