source: src/main/java/genius/core/analysis/pareto/PartialBidPoint.java

package genius.core.analysis.pareto;

import java.util.Collections;
import java.util.Set;

/**
 * Similar to BidPoint but can hold partial bids. Generic as it uses IssueValue
 *
 */
public class PartialBidPoint {

        /**
         * This needs to be slightly negative, so that isDominatedBy also says yes
         * if the other point is slightly negative of our point.
         */
        private final static double MIN_DELTA = -0.0000000000001;
        private final Set<IssueValue> values;
        /**
         * Caches the actual sum of the value utilities.
         */
        private final Double utilA, utilB;

        public PartialBidPoint(Set<IssueValue> values, Double utilA, Double utilB) {
                this.values = values;
                this.utilA = utilA;
                this.utilB = utilB;
        }

        public Double utilA() {
                return utilA;
        }

        public Double utilB() {
                return utilB;
        }

        public Set<IssueValue> getValues() {
                return Collections.unmodifiableSet(values);
        }

        public boolean isDominatedBy(PartialBidPoint p) {
                return (p.utilA - utilA > MIN_DELTA) && (p.utilB - utilB > MIN_DELTA);
        }

        @Override
        public String toString() {
                return "point(" + utilA + "," + utilB + ")";
        }

}