source: src/main/java/agents/BidComparator.java

package agents;

import java.util.Comparator;

import genius.core.Bid;
import genius.core.utility.UtilitySpace;

/**
 * {@link Comparator} for {@link Bid}s. Used for sorting a set of bids.
 * 
 * Use example:
 * <code>               Collections.sort(bids, new BidComparator(utilitySpace));
</code>
 * 
 * @author W.Pasman
 *
 */
public class BidComparator implements java.util.Comparator<Bid> {
        UtilitySpace utilspace;

        public BidComparator(UtilitySpace us) {
                if (us == null)
                        throw new NullPointerException("null utility space");
                utilspace = us;
        }

        public int compare(Bid b1, Bid b2) throws ClassCastException {
                double d1 = 0, d2 = 0;
                try {
                        d1 = utilspace.getUtility(b1);
                        d2 = utilspace.getUtility(b2);
                } catch (Exception e) {
                        e.printStackTrace();
                }

                if (d1 < d2)
                        return 1;
                if (d1 > d2)
                        return -1;
                return 0;
        }
}