source: src/main/java/bargainingchips/utilityfunctions/UF_FreeDisposal.java@ 340

package bargainingchips.utilityfunctions;

import bargainingchips.Bundle;
import bargainingchips.Stack;

/**
 * While the total price of the bundle b is less than that of the wishlist, 
 * it evaluates the bundle as 1.0 if quantity of all stacks in b is equal or more than
 * that of the stack of the same color in wishlist; since 
 * under free disposal it doesn't cost to receive extra quantities. 
 * If any less quantity or extra total price, it evaluates bundle b as 0.0.
 * 
 * @author Faria Nassiri-Mofakham
 *
 */
public class UF_FreeDisposal implements UtilityFunction {

        Bundle wishlist;

        public UF_FreeDisposal(Bundle w)
        {
                this.wishlist=w;
        }

        /**
         * @return the wishlist
         */
        public Bundle getWishlist() 
        {
                return wishlist;
        }

        /**
         * @param wishlist the wishlist to set
         */
        public void setWishlist(Bundle w) 
        {
                this.wishlist = w;
        }

        @Override
        public Double getUtility(Bundle b) 
        {
                // TODO Auto-generated method stub
                int num=0;
                if (b!=null)
                {
                        for (Stack s : b)
                        {
                                for (Stack t: wishlist)
                                        if (s.getColor()==t.getColor() && s.getQuantity() != t.getQuantity())
                                                if (s.getQuantity() < t.getQuantity()) //bundle b doesn't have any stacks with extra quantities
                                                        return 0.0;     
                                num++; //bundle b has extra stacks
                        }
                        if (b.size() >= wishlist.size() && num >= 0 && b.getTotalPrice() <= wishlist.getTotalPrice())
                                return 1.0;
                        else 
                                return 0.0;
                }
                return 0.0;
        }

        @Override
        public String toString()
        {
                return this.getClass().getSimpleName();
        }

}