source: src/main/java/bargainingchips/utilityfunctions/UF_AllOrNothing.java@ 337

package bargainingchips.utilityfunctions;

import bargainingchips.Bundle;
import bargainingchips.BundleBuilder;
import bargainingchips.Chip;
import bargainingchips.WishList;
import bargainingchips.WishListBuilder;

/**
 * If all requested quantities at the total requested price (or less) would be satisfied, 
 * then the bundle is evaluated as 1.0, otherwise as 0.0;
 */
public class UF_AllOrNothing implements UtilityFunction 
{
        private WishList wishlist;
        private double maxprice;


        public UF_AllOrNothing(WishList w, double max)
        {
                this.wishlist = w;
                this.maxprice = max;
        }


        @Override
        public Double getUtility(Bundle b) 
        {
                if (b.getTotalPrice() > maxprice)
                        return 0.0;

                for (Chip c : wishlist)
                {
                        int desired = wishlist.getQuantity(c);
                        Integer offered = b.getQuantity(c);

                        if (offered == null || desired != offered)
                                return 0.0;
                }

                return 1.0;
        }

        @Override
        public String toString()
        {
                return this.getClass().getSimpleName() + ": " + wishlist.toString() + " for <= $" + maxprice;
        }
        
        public static void main(String[] args) 
        {
                WishList wishlist = new WishListBuilder().addWish("Red", 3).addWish("Green", 2).build();
                UF_AllOrNothing u = new UF_AllOrNothing(wishlist, 10.0);
                System.out.println(u);
                
                Bundle offer = new BundleBuilder()
                                .addStack("Red", 1.0, 3)
                                .addStack("Green", 3.0, 2)
                                .addStack("Purple", 0.10, 10)
                                .build();
                System.out.println(u.getUtility(offer));
        }

}