source: src/main/java/negotiator/boaframework/omstrategy/NullStrategy.java@ 125

package negotiator.boaframework.omstrategy;

import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import agents.anac.y2012.TheNegotiatorReloaded.TheNegotiatorReloaded;
import genius.core.bidding.BidDetails;
import genius.core.boaframework.BOAparameter;
import genius.core.boaframework.NegotiationSession;
import genius.core.boaframework.OMStrategy;
import genius.core.boaframework.OpponentModel;

/**
 * Baseline strategy which simply returns a random bid from the given array of
 * bids. Basically, the opponent model is ignored.
 * 
 * @author Mark Hendrikx
 */
public class NullStrategy extends OMStrategy {

        /**
         * when to stop updating the opponentmodel. Note that this value is not
         * exactly one as a match sometimes lasts slightly longer.
         */
        private double updateThreshold = 1.1;

        /**
         * Empty constructor used for reflexion. Note this constructor assumes that
         * init is called next.
         */
        public NullStrategy() {
        }

        /**
         * Special constructor for {@link TheNegotiatorReloaded}
         * 
         * @param negotiationSession
         *            nego session
         * @param time
         *            update time
         */
        public NullStrategy(NegotiationSession negotiationSession, double time) {
                this.negotiationSession = negotiationSession;
                updateThreshold = time;
        }

        /**
         * Normal constructor used to initialize the NullStrategy opponent model
         * strategy.
         * 
         * @param negotiationSession
         *            symbolizing the negotiation state.
         */
        public NullStrategy(NegotiationSession negotiationSession) {
                this.negotiationSession = negotiationSession;
        }

        public void init(NegotiationSession negotiationSession, OpponentModel model, HashMap<String, Double> parameters)
                        throws Exception {
                super.init(negotiationSession, model, parameters);
                this.negotiationSession = negotiationSession;
                if (parameters.containsKey("t")) {
                        updateThreshold = parameters.get("t");
                }
        }

        /**
         * Returns a random bid from the give array of similarly preferred bids.
         * 
         * @param allBids
         *            list of similarly preferred bids.
         * @return random bid from given array.
         */
        @Override
        public BidDetails getBid(List<BidDetails> allBids) {
                return allBids.get(0);
        }

        /**
         * Returns true if the opponent model be updated, which is in this case if
         * the time is lower than the given threshold.
         * 
         * @return true if model may be updated.
         */
        @Override
        public boolean canUpdateOM() {
                return negotiationSession.getTime() < updateThreshold;
        }

        @Override
        public Set<BOAparameter> getParameterSpec() {
                Set<BOAparameter> set = new HashSet<BOAparameter>();
                set.add(new BOAparameter("t", 1.1, "Time after which the OM should not be updated"));
                return set;
        }

        @Override
        public String getName() {
                return "NullStrategy";
        }
}