source: src/main/java/parties/in4010/q12015/group13/IntegerIssueModel.java@ 148

package parties.in4010.q12015.group13;

import genius.core.issue.IssueInteger;
import genius.core.issue.ValueInteger;

public class IntegerIssueModel implements IssueModel<ValueInteger> {
        private double minFreq;
        private double maxFreq;
        private int min;
        private int max;
        private int half;

        public IntegerIssueModel(IssueInteger i) {
                minFreq = maxFreq = 0;

                min = i.getLowerBound();
                max = i.getUpperBound();

                half = min + (max - min) / 2;
        }

        @Override
        public void addBid(ValueInteger v) {
                if (v.getValue() < half) {
                        minFreq += (half - v.getValue()) / (half - min);
                } else if (v.getValue() > half) {
                        maxFreq += (v.getValue() - half) / (max - half);
                }
        }

        @Override
        public double estimateUtility(ValueInteger v) {
                if (minFreq == 0 && maxFreq == 0) {
                        return 1;
                }

                double m = minFreq >= maxFreq ? minFreq : maxFreq;

                double div = (max - min) * m;

                return ((max - v.getValue()) * minFreq + (v.getValue() - min) * maxFreq)
                                / div;
        }

        @Override
        public String toString() {
                double m = minFreq >= maxFreq ? minFreq : maxFreq;

                return min + ": " + (minFreq / m) + ", " + max + ": " + (maxFreq / m);
        }

}