source: src/main/java/agents/anac/y2015/AgentX/strategy.java

package agents.anac.y2015.AgentX;

import java.util.ArrayList;

import genius.core.Bid;
import genius.core.utility.AdditiveUtilitySpace;

public class strategy {
        private AdditiveUtilitySpace utilitySpace;
        private negotiatingInfo negotiatingInfo;
        
        private double df = 0.0; // 割引係数
        private double rv = 0.0; // 留保価格

        public strategy(AdditiveUtilitySpace utilitySpace, negotiatingInfo negotiatingInfo) {           
                this.utilitySpace = utilitySpace;
                this.negotiatingInfo = negotiatingInfo;
                df = utilitySpace.getDiscountFactor();
                rv = utilitySpace.getReservationValue();
        }
        
        // 受容判定
        public boolean selectAccept(Bid offeredBid, double time) {
                try {
                        double offeredBidUtil = utilitySpace.getUtility(offeredBid);
                        if(offeredBidUtil >= getThreshold(time)){ return true; }
                        else{ return false; }
                } catch (Exception e) {
                        System.out.println("受容判定に失敗しました");
                        e.printStackTrace();
                        return false;
                }
        }
        
        // 交渉終了判定
        public boolean selectEndNegotiation(double time) {
                return false;
        }
        
        // 閾値を返す
        public double getThreshold(double time) {
                double threshold = 1.0;
                double mi = 0.0;
                double ave = 0.0;
                double extra = 0.0;
                
                /* 交渉戦略に基づきthreshold(t)を設計する */
                /* negotiatingInfoから提案履歴の統計情報を取得できるので使っても良い */
                // 例：
                ArrayList<Object> opponents =  negotiatingInfo.getOpponents();
                //double sum = 0;
                //double sum_round = 0;
                //double mall = 0;
                
                for(Object sender:opponents){
                        if ((negotiatingInfo.getPartnerBidNum(sender) % 10) == 0)
                        {
                                ave = 0;
                                extra = 0;
                        }                       
                        //sum = sum + negotiatingInfo.getAverage(sender) * negotiatingInfo.getPartnerBidNum(sender);
                        //sum_round = sum_round + negotiatingInfo.getPartnerBidNum(sender);
                        
                        double m = negotiatingInfo.getAverage(sender);          
                        // double v = negotiatingInfo.getVariancer(sender);
                        double sd = negotiatingInfo.getStandardDeviation(sender);
            ave = m;
            extra = sd;
                }
                
                //ave = sum / sum_round;
                //System.out.println(ave);
                
        mi = 1 - Math.pow(time, 0.382);
        
        if(ave >= 0.618)
            threshold = ave + extra;
        else {
            threshold = mi;
        }
        return threshold;
    }
}