praktikum-holons/src/holeg/algorithm/objective_function/Evaluation.java

package holeg.algorithm.objective_function;

import holeg.model.Flexibility;
import holeg.model.Holon;
import holeg.model.HolonElement.Priority;
import holeg.model.HolonObject;
import holeg.model.HolonObject.HolonObjectState;
import holeg.model.Model;
import java.util.List;

public class Evaluation {

  /**
   * Calculate the Fitness(Penelty) Value for a state (alias the calculated Position).
   *
   * @return
   */
  public static double getFitnessValueForState(Model model) {
    double fitness = 0.0;
    double nw_fitness = 0.0;
    double object_fitness = 0.0;
    double flexFitness = 0.0;

    double sigma = 9;

    // calculate network_fitness
    for (Holon holon : model.holons) {
      float production = holon.getTotalProduction();
      float consumption = holon.getTotalConsumption();
      nw_fitness += Math.abs((production - consumption) / 100); //Energy is now everywhere positive
    }

    // calculate object_fitness
    for (Holon holon : model.holons) {

      object_fitness += holon.holonObjects.stream().filter(HolonObject::isConsumer).map(
              con -> holonObjectSupplyPenaltyFunction(
                  con.getSupplyBarPercentage()) /*+ inactiveHolonElementPenalty(con.getModel())*/)
          .reduce(0.0, Double::sum);
      object_fitness += holon.holonObjects.stream().filter(HolonObject::isConsumer)
          .map(con -> StateToDouble(con.getState())).reduce(0.0, Double::sum);
    }
    List<Flexibility> getAllFlexInUse = model.getAllFlexibilities().stream()
        .filter(flex -> flex.getState().equals(Flexibility.FlexState.IN_USE)).toList();
    for (Flexibility flex : getAllFlexInUse) {
      flexFitness += Math.pow(sigma, (double) priorityToInt(flex.getElement().getPriority())) - 1;
    }

    fitness = nw_fitness + object_fitness + flexFitness;
    return fitness;
  }


  private static int priorityToInt(Priority priority) {
    switch (priority) {
      case Essential:
        return 3;
      case High:
        return 2;
      case Medium:
        return 1;
      case Low:
      default:
        return 0;
    }
  }


  /**
   * Untouched: Function that returns the fitness depending on the number of elements deactivated in
   * a single holon object
   *
   * @param obj Holon Object that contains Holon Elements
   * @return fitness value for that object depending on the number of deactivated holon elements
   */
  @SuppressWarnings("unused")
  private static double inactiveHolonElementPenalty(HolonObject obj) {
    float result = 0;
    int activeElements = obj.getNumberOfActiveElements();
    int maxElements = (int) obj.elementsStream().count();

    //result = (float) Math.pow((maxElements -activeElements),2)*10;
    result = (float) Math.pow(5,
        4 * ((float) maxElements - (float) activeElements) / (float) maxElements) - 1;
    //System.out.console.println("max: " + maxElements + " active: " + activeElements + " results in penalty: " + result);
    return result;

  }

  /**
   * Untouched: Calculates a penalty value based on the HOs current supply percentage
   *
   * @param supplyPercentage
   * @return
   */
  private static double holonObjectSupplyPenaltyFunction(float supplyPercentage) {
    double result = 0;
		/*if(supplyPercentage == 1)
			return result;
		else if(supplyPercentage < 1 && supplyPercentage >= 0.25) // undersupplied inbetween 25% and 100%
			result = (float) Math.pow(1/supplyPercentage, 2);
		else if (supplyPercentage < 0.25) //undersupplied with less than 25%
			result = (float) Math.pow(1/supplyPercentage,2);
		else if (supplyPercentage < 1.25)  //Oversupplied less than 25%
			result = (float) Math.pow(supplyPercentage,3) ;
		else result = (float) Math.pow(supplyPercentage,4); //Oversupplied more than 25%
		
		
		if(Float.isInfinite(result) || Float.isNaN(result))
			result = 1000;
	*/
    if (supplyPercentage <= 1.0) {
      result = Math.pow(5, (Math.abs((100 - (supplyPercentage * 100))) / 50 + 2)) - Math.pow(5, 2);
    } else {
      result = Math.pow(6, (Math.abs((100 - (supplyPercentage * 100))) / 50 + 2)) - Math.pow(6, 2);
    }

    return result;
  }

  /**
   * If you want to get in touch with a reliable state? Working function not in use currently.
   *
   * @param state
   * @return
   */
  private static double StateToDouble(HolonObjectState state) {
    switch (state) {
      case NOT_SUPPLIED:
        return 150.0;
      case NO_ENERGY:
        return 150.0;
      case OVER_SUPPLIED:
        return 100.0;
      case PARTIALLY_SUPPLIED:
        return 100.0;
      case PRODUCER:
        return 0;
      case SUPPLIED:
        return 0;
      default:
        return 0;
    }
  }
}