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

package agents.anac.y2015.AgentW;

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) {
                
                int negonum = negotiatingInfo.getNegotiatorNum();
                
                double ou[] = new double[negonum];
                double avarage = 0;
                
                //System.out.println("nego :"+ou.length);
                
                if(negotiatingInfo.getOpponents().size()!=0){
                        for(int i=0;i<negotiatingInfo.getOpponents().size();i++){
                                        
                                //System.out.println(negotiatingInfo.getOpponents().get(i));
                                //System.out.println("差："+negotiatingInfo.getgap(negotiatingInfo.getOpponents().get(i)));
                                                                
                                ou[i] = 4*negotiatingInfo.getgap(negotiatingInfo.getOpponents().get(i));
                                ou[i] = ou[i] + 3*negotiatingInfo.getgapn(negotiatingInfo.getOpponents().get(i),1);
                                ou[i] = ou[i] + 2*negotiatingInfo.getgapn(negotiatingInfo.getOpponents().get(i),2);
                                ou[i] = ou[i] + negotiatingInfo.getgapn(negotiatingInfo.getOpponents().get(i),3);

                                ou[i] = ou[i]/10;
                                avarage = avarage + ou[i];
                        }
                        
                        avarage = avarage / (negonum-1);
                }
                
                double e = 0.3;
                
                //double threshold = 1.0 - time;
                double threshold = 1.0 - Math.pow(time,1/e);
                
                if ((threshold - avarage > 0)&&(threshold - avarage < 1)){
                        threshold = threshold - avarage;
                }
                
                /* 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();
                for(Object sender:opponents){
                        double m = negotiatingInfo.getAverage(sender);
                        double v = negotiatingInfo.getVariancer(sender);
                        double sd = negotiatingInfo.getStandardDeviation(sender);
                }
                */
                
                return threshold;
        }

}