source: src/main/java/negotiator/boaframework/offeringstrategy/anac2010/IAMhaggler2010/TimeConcessionFunction.java

package negotiator.boaframework.offeringstrategy.anac2010.IAMhaggler2010;

public class TimeConcessionFunction extends ConcessionFunction {

        private double beta;
        private double breakoff;

        public TimeConcessionFunction(double beta, double breakoff) {
                this.beta = beta;
                this.breakoff = breakoff;
        }

        @Override
        public double getConcession(double startUtility, long currentTime, double totalTime) {
                return startUtility - (startUtility - breakoff) * Math.pow(currentTime / totalTime, 1.0 / beta);
        }

        public class Beta {
                public static final double CONCEDER_EXTREME = 5.0;
                public static final double CONCEDER = 2.0;
                public static final double LINEAR = 1.0;
                public static final double BOULWARE = 0.5;
                public static final double BOULWARE_EXTREME = 0.2;
        }

        public static final double BREAKOFF = 0.0;
        public static final double DEFAULT_BREAKOFF = 0.5;
}