source: src/main/java/negotiator/boaframework/acceptanceconditions/anac2010/AC_IAMcrazyHaggler.java

package negotiator.boaframework.acceptanceconditions.anac2010;

import java.util.Map;

import genius.core.boaframework.AcceptanceStrategy;
import genius.core.boaframework.Actions;
import genius.core.boaframework.NegotiationSession;
import genius.core.boaframework.OfferingStrategy;
import genius.core.boaframework.OpponentModel;

/**
 * This is the decoupled Acceptance Conditions for IAMcrazyHaggler (ANAC2010).
 * The code was taken from the ANAC2010 IAMHaggler and adapted to work within
 * the BOA framework.
 * 
 * Decoupling Negotiating Agents to Explore the Space of Negotiation Strategies
 * T. Baarslag, K. Hindriks, M. Hendrikx, A. Dirkzwager, C.M. Jonker
 * 
 * @author Alex Dirkzwager, Mark Hendrikx
 * @version 18/12/11
 */
public class AC_IAMcrazyHaggler extends AcceptanceStrategy {

        private double maximum_aspiration = 0.85;
        private final double acceptMultiplier = 1.02;

        /**
         * Empty constructor for the BOA framework.
         */
        public AC_IAMcrazyHaggler() {
        }

        public AC_IAMcrazyHaggler(NegotiationSession negoSession, OfferingStrategy strat) throws Exception {
                init(negoSession, strat, null, null);
        }

        @Override
        public void init(NegotiationSession negoSession, OfferingStrategy strat, OpponentModel opponentModel,
                        Map<String, Double> parameters) throws Exception {
                this.negotiationSession = negoSession;
                offeringStrategy = strat;

                if (negotiationSession.getDiscountFactor() == 0) {
                        maximum_aspiration = 0.9;
                }
        }

        @Override
        public Actions determineAcceptability() {
                if (negotiationSession.getOpponentBidHistory() != null
                                && negotiationSession.getOwnBidHistory().getLastBidDetails() != null) {
                        double lastOpponentBidUtil = negotiationSession.getOpponentBidHistory().getLastBidDetails()
                                        .getMyUndiscountedUtil();
                        double lastMyBidUtil = negotiationSession.getOwnBidHistory().getLastBidDetails().getMyUndiscountedUtil();
                        // accept if the offered utility => 0.98 * previous offer OR
                        // accept if the offered utility => 0.98 * nextBid OR
                        // accept if the offered utility => 0.98 * maxUtility
                        if (lastOpponentBidUtil * acceptMultiplier > lastMyBidUtil
                                        || lastOpponentBidUtil * acceptMultiplier > offeringStrategy.getNextBid().getMyUndiscountedUtil()
                                        || lastOpponentBidUtil * acceptMultiplier > maximum_aspiration) {
                                return Actions.Accept;
                        }
                }
                return Actions.Reject;
        }

        @Override
        public String getName() {
                return "2010 - IAMcrazyHaggler";
        }
}