/* GPNodeComparator.java
 * J Scott Cameron
 *
 * implements Comparator in order to
 * sort the Genetic Program nodes.
 */
import java.util.*;
import java.io.*;
import GPNodeContainer;

public class GPNodeComparator implements Comparator
{
    public GPNodeComparator()
    {}
   
    /* returns a 1 if Node 1 is less fit
     * a -1 if Node 1 is more fit
     * and 0 if they are equal
     * this will reverse sort the nodes
     */
    public int compare(Object o1, Object o2)
    {
        GPNodeContainer g1 = (GPNodeContainer)o1;
        GPNodeContainer g2 = (GPNodeContainer)o2;
        
        if(g1.getRating() < g2.getRating())
        {
            return 1;
        }
        else if(g1.getRating() > g2.getRating())
        {
            return -1;
        }
        
        return 0;
    }
}