source: src/main/java/bargainingchips/utilityfunctions/UF_prcntQTYandprcntPrice.java@ 341

package bargainingchips.utilityfunctions;

import bargainingchips.Bundle;
import bargainingchips.Stack;


/**
 * If p1 percent of the stacks regarding quantity and p2 percent of total price of the bundle be satisfied
 * compared to the total price of the wishlist, 
 * bundle b would be evaluated as 1.0, otherwise as 0.0.
 * 
 * @author Faria Nassiri-Mofakham
 *
 */
public class UF_prcntQTYandprcntPrice implements UtilityFunction {

        Bundle wishlist;

        double p1;
        double p2;      

        public UF_prcntQTYandprcntPrice(Bundle w, double p1, double p2)
        {
                this.wishlist=w;
                this.p1=p1;  // tolerable percentage for extra price 
                this.p2=p2;  // tolerable percentage for extra stacks and/or stacks with less quantities 
        }

        /**
         * @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=wishlist.size();

                if (b!=null)
                {
                        for (Stack s : b)
                                for (Stack t: wishlist)
                                        if (s.hasSameColorAs(t) && s.getQuantity() >= t.getQuantity())
                                                // if the quantity is less than what is required, so this stack could not be satisfied
                                                num--;                                                  
                        if (b.getTotalPrice() <= p2* wishlist.getTotalPrice()+wishlist.getTotalPrice() && num < (double)wishlist.size()*(1-p1) )   
                                // i.e., the number of `dissatisfied' stacks are less than p1 percent of the stacks regarding the quantity
                                // and, the bundle total price is less that or equal to p2 percent of the wishlist total price 
                                return 1.0;
                        else 
                                return 0.0;
                }
                return 0.0;
        }


        /**
         * @return the p1
         */
        public double getP1() {
                return p1;
        }


        /**
         * @param p1 the p1 to set
         */
        public void setP1(double p1) {
                this.p1 = p1;
        }


        /**
         * @return the p2
         */
        public double getP2() {
                return p2;
        }


        /**
         * @param p2 the p2 to set
         */
        public void setP2(double p2) {
                this.p2 = p2;
        }

        @Override
        public String toString()
        {
                return this.getClass().getSimpleName()+":qty%"+p1+":price%"+p2;
        }

}