source: src/main/java/agents/anac/y2015/TUDMixedStrategyAgent/BidGenerator.java

package agents.anac.y2015.TUDMixedStrategyAgent;

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

import genius.core.Bid;
import genius.core.issue.Issue;
import genius.core.issue.IssueDiscrete;
import genius.core.issue.Value;
import genius.core.issue.ValueDiscrete;
import genius.core.utility.AdditiveUtilitySpace;
import genius.core.utility.EvaluatorDiscrete;

public class BidGenerator {

        // Just static methods
        private BidGenerator() {
                super();
        }

        // Unused
        // retreives the value with the highest evaluation for this Issue
        public static Value getMaxValue(EvaluatorDiscrete Eval) {
                double currentValue = 0;
                ValueDiscrete maxvalue = null;
                double maxevaluated = 0;

                Set<ValueDiscrete> valueSet = Eval.getValues();
                for (ValueDiscrete value : valueSet) {
                        try {
                                currentValue = Eval.getEvaluation(value);
                                if (maxevaluated < currentValue) {
                                        maxevaluated = currentValue;
                                        maxvalue = value;
                                }
                        } catch (Exception e) {
                                e.printStackTrace();
                        }
                }
                return maxvalue;
        }

        // Generates a List with the utility of the list of bids it receives
        public static double[] utilitylist(ArrayList<Bid> bids,
                        TUDMixedStrategyAgent info) {

                double[] utilityarray = new double[bids.size()];

                for (int i = 0; i < bids.size(); i++) {
                        utilityarray[i] = info.getUtility(bids.get(i));
                }

                return utilityarray;
        }

        // Generates a List of all possible bids in this UtilitySpace
        public static ArrayList<Bid> BidList(AdditiveUtilitySpace utilitySpace) {
                List<Issue> issueList = utilitySpace.getDomain().getIssues();
                ArrayList<ArrayList<ValueDiscrete>> listValueList = new ArrayList<ArrayList<ValueDiscrete>>();
                ArrayList<Bid> bidList = new ArrayList<Bid>();
                int bidListsize = 1;
                int nIssues = issueList.size();
                int[] nValues = new int[nIssues];
                for (int i = 0; i < issueList.size(); i++) {
                        listValueList
                                        .add((ArrayList<ValueDiscrete>) ((IssueDiscrete) issueList
                                                        .get(i)).getValues());
                        nValues[i] = listValueList.get(i).size();
                        bidListsize = bidListsize * nValues[i];
                }
                ValueDiscrete[][] valueMatrix = new ValueDiscrete[bidListsize][nIssues];
                for (int i = 0; i < nIssues; i++) {
                        int before = 1, actual = nValues[i], after = 1;
                        for (int k = 0; k < i; k++) {
                                before = before * nValues[k];
                        }
                        for (int k = nIssues - 1; k > i; k--) {
                                after = after * nValues[k];
                        }
                        for (int j = 0; j < before; j++) {
                                for (int k = 0; k < actual; k++) {
                                        for (int l = 0; l < after; l++) {
                                                valueMatrix[l + actual * after * j + k * after][i] = listValueList
                                                                .get(i).get(k);
                                        }
                                }
                        }

                }
                for (int i = 0; i < bidListsize; i++) {
                        HashMap<Integer, Value> bidMap = new HashMap<Integer, Value>();
                        for (int j = 0; j < nIssues; j++) {
                                bidMap.put(issueList.get(j).getNumber(), valueMatrix[i][j]);
                        }
                        Bid currentBid;
                        try {
                                currentBid = new Bid(utilitySpace.getDomain(), bidMap);
                                bidList.add(currentBid);
                        } catch (Exception e) {
                                e.printStackTrace();
                        }
                }
                return bidList;
        }

        /*
         * Returns ArrayList of Bids within the range given, if there isn't any
         * returns closest Bid with higher utility, If still there isn't any will
         * return Bid with closest lower utility. If there isn't any will return an
         * empty ArrayList
         */
        public static ArrayList<Bid> getBidsInRange(ArrayList<Bid> bids,
                        double low_bound, double up_bound, TUDMixedStrategyAgent info) {
                ArrayList<Bid> bidsInRange = new ArrayList<Bid>();
                // No bids
                if (bids.isEmpty())
                        return bidsInRange;
                for (int i = 0; i < bids.size(); i++) {
                        if (low_bound < info.getUtility(bids.get(i))
                                        && up_bound > info.getUtility(bids.get(i))) {
                                bidsInRange.add(bids.get(i));
                        }
                }
                if (bidsInRange.isEmpty()) {
                        // There are none within range, search for larger than range
                        for (int i = 0; i < bids.size(); i++) {
                                if (low_bound < info.getUtility(bids.get(i))) {
                                        bidsInRange.add(bids.get(i));
                                }
                        }
                }
                if (bidsInRange.isEmpty()) {
                        // There are none inside or larger than range, search for closest
                        // smaller
                        double distance = Double.MAX_VALUE;
                        Bid closestBid = null;
                        for (int i = 0; i < bids.size(); i++) {
                                if (distance > low_bound - info.getUtility(bids.get(i))) {
                                        closestBid = bids.get(i);
                                        distance = low_bound - info.getUtility(bids.get(i));
                                }
                        }
                        bidsInRange.add(closestBid);
                }
                return bidsInRange;

        }
}