Java Solution.getObjective方法代码示例

import org.uma.jmetal.solution.Solution; //导入方法依赖的package包/类
/**
 * Updates the grid limits considering the solutions contained in a
 * <code>solutionList</code>.
 *
 * @param solutionList The <code>solutionList</code> considered.
 */
private void updateLimits(List<S> solutionList) {
  for (int obj = 0; obj < numberOfObjectives; obj++) {
    gridLowerLimits[obj] = Double.MAX_VALUE;
    gridUpperLimits[obj] = Double.MIN_VALUE;
  }

  //Find the max and min limits of objetives into the population
  for (int ind = 0; ind < solutionList.size(); ind++) {
    Solution<?> tmpIndividual = solutionList.get(ind);
    for (int obj = 0; obj < numberOfObjectives; obj++) {
      if (tmpIndividual.getObjective(obj) < gridLowerLimits[obj]) {
        gridLowerLimits[obj] = tmpIndividual.getObjective(obj);
      }
      if (tmpIndividual.getObjective(obj) > gridUpperLimits[obj]) {
        gridUpperLimits[obj] = tmpIndividual.getObjective(obj);
      }
    }
  }
}
 

import org.uma.jmetal.solution.Solution; //导入方法依赖的package包/类
@Override
public void update(Solution<?> solution) {
  if (solution == null) {
    throw new JMetalException("The solution is null") ;
  } else if (solution.getNumberOfObjectives() != this.getNumberOfObjectives()) {
    throw new JMetalException("The number of objectives of the solution ("
        + solution.getNumberOfObjectives()
        + ") "
        + "is different to the size of the reference point("
        + this.getNumberOfObjectives()
        + ")"
    );
  }

  for (int i = 0; i < this.getNumberOfObjectives(); i++) {
    if (this.getObjective(i) > solution.getObjective(i)) {
      this.setObjective(i, solution.getObjective(i));
    }
  }
}
 

import org.uma.jmetal.solution.Solution; //导入方法依赖的package包/类
@Override
public void update(Solution<?> solution) {
  if (solution == null) {
    throw new JMetalException("The solution is null") ;
  } else if (solution.getNumberOfObjectives() != this.getNumberOfObjectives()) {
    throw new JMetalException("The number of objectives of the solution ("
        + solution.getNumberOfObjectives()
        + ") "
        + "is different to the size of the reference point("
        + this.getNumberOfObjectives()
        + ")"
    );
  }

  for (int i = 0; i < this.getNumberOfObjectives(); i++) {
    if (this.getObjective(i) < solution.getObjective(i)) {
      this.setObjective(i, solution.getObjective(i));
    }
  }
}
 

import org.uma.jmetal.solution.Solution; //导入方法依赖的package包/类
/**
 * Calculates the hypervolume of that portion of the objective space that
 * is dominated by individual a but not by individual b
 */
double calculateHypervolumeIndicator(Solution<?> solutionA, Solution<?> solutionB, int d,
    double maximumValues[], double minimumValues[]) {
  double a, b, r, max;
  double volume ;
  double rho = 2.0;

  r = rho * (maximumValues[d - 1] - minimumValues[d - 1]);
  max = minimumValues[d - 1] + r;

  a = solutionA.getObjective(d - 1);
  if (solutionB == null) {
    b = max;
  } else {
    b = solutionB.getObjective(d - 1);
  }

  if (d == 1) {
    if (a < b) {
      volume = (b - a) / r;
    } else {
      volume = 0;
    }
  } else {
    if (a < b) {
      volume =
          calculateHypervolumeIndicator(solutionA, null, d - 1, maximumValues, minimumValues) * (b
              - a) / r;
      volume +=
          calculateHypervolumeIndicator(solutionA, solutionB, d - 1, maximumValues, minimumValues)
              * (max - b) / r;
    } else {
      volume =
          calculateHypervolumeIndicator(solutionA, solutionB, d - 1, maximumValues, minimumValues)
              * (max - a) / r;
    }
  }

  return (volume);
}
 

import org.uma.jmetal.solution.Solution; //导入方法依赖的package包/类
/**
 * Constructor
 *
 * @param solution
 */
public PointSolution(Solution<?> solution) {
  this.numberOfObjectives = solution.getNumberOfObjectives() ;
  objectives = new double[numberOfObjectives] ;

  for (int i = 0; i < numberOfObjectives; i++) {
    this.objectives[i] = solution.getObjective(i) ;
  }
}
 

import org.uma.jmetal.solution.Solution; //导入方法依赖的package包/类
/**
 * Constructor from a solution
 *
 * @param solution
 */
public ArrayPoint(Solution<?> solution) {
  if (solution == null) {
    throw new JMetalException("The solution is null") ;
  }

  int dimensions = solution.getNumberOfObjectives();
  point = new double[dimensions];

  for (int i = 0; i < dimensions; i++) {
    point[i] = solution.getObjective(i);
  }
}