source: src/main/java/negotiator/boaframework/opponentmodel/agentsmithv2/IssueModel.java

package negotiator.boaframework.opponentmodel.agentsmithv2;

import genius.core.Bid;
import genius.core.issue.Issue;
import genius.core.issue.Value;
import genius.core.misc.ScoreKeeper;

/**
 * Class which keeps track of the issues for an optimized version of the Smith Frequency Model.
 * 
 * @author Mark Hendrikx
 */
public class IssueModel {
        
        /** Object to keep track of how many times each value of the issue has been offered */
        private ScoreKeeper<Value> keeper;
        /** The index of the issue in the domain's XML file */
        private int issueNr;
        
        /**
         * @param issue of which values is kept track in this class
         */
        public IssueModel(Issue issue) {
                keeper = new ScoreKeeper<Value>();
                this.issueNr = issue.getNumber();
        }
        
        /**
         * Method which scores the value which was offered.
         */
        public void addValue(Bid pBid) {
                keeper.score(getBidValueByIssue(pBid, issueNr));
        }
        
        /**
         * The utility of a bid, which can be real, integer or discrete
         */
        public double getUtility(Bid pBid) {
                double lUtility = keeper.getRelativeScore(getBidValueByIssue(pBid, issueNr));
                return lUtility;
        }
        
        /**
         * Get's the importance of this issues utility
         */
        public double getWeight() {
                return ((double) keeper.getMaxValue() / (double) keeper.getTotal());
        }
        
        /**
         * returns the value of an issue in a bid
         */
        public static Value getBidValueByIssue(Bid pBid, int issueNumber) {
                Value lValue = null;
                try {
                        lValue = pBid.getValue(issueNumber); 
                } catch(Exception e) { }
                
                return lValue;
                
        }
}