org.uma.jmetal.runner.multiobjective.ESPEARunner Maven / Gradle / Ivy

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package org.uma.jmetal.runner.multiobjective;

import java.io.FileNotFoundException;
import java.util.List;

import org.uma.jmetal.algorithm.Algorithm;
import org.uma.jmetal.algorithm.multiobjective.espea.ESPEABuilder;
import org.uma.jmetal.algorithm.multiobjective.espea.util.ScalarizationWrapper;
import org.uma.jmetal.algorithm.multiobjective.espea.util.EnergyArchive.ReplacementStrategy;
import org.uma.jmetal.algorithm.multiobjective.espea.util.ScalarizationWrapper.ScalarizationType;
import org.uma.jmetal.operator.CrossoverOperator;
import org.uma.jmetal.operator.MutationOperator;
import org.uma.jmetal.operator.impl.crossover.SBXCrossover;
import org.uma.jmetal.operator.impl.mutation.PolynomialMutation;
import org.uma.jmetal.problem.Problem;
import org.uma.jmetal.solution.DoubleSolution;
import org.uma.jmetal.util.AbstractAlgorithmRunner;
import org.uma.jmetal.util.AlgorithmRunner;
import org.uma.jmetal.util.JMetalException;
import org.uma.jmetal.util.JMetalLogger;
import org.uma.jmetal.util.ProblemUtils;

/**
 * Class to configure and run the ESPEA algorithm
 *
 * @author Marlon Braun 
 */
public class ESPEARunner extends AbstractAlgorithmRunner {
  /**
   * @param args Command line arguments.
   * @throws FileNotFoundException Invoking command:
   *                               java org.uma.jmetal.runner.multiobjective.ESPEARunner problemName [referenceFront]
   */
  public static void main(String[] args) throws JMetalException, FileNotFoundException {
    Problem problem;
    Algorithm> algorithm;
    CrossoverOperator crossover;
    MutationOperator mutation;
    String referenceParetoFront = "";

    String problemName;
    if (args.length == 1) {
      problemName = args[0];
    } else if (args.length == 2) {
      problemName = args[0];
      referenceParetoFront = args[1];
    } else {
      problemName = "org.uma.jmetal.problem.multiobjective.zdt.ZDT3";
//      problemName = "org.uma.jmetal.problem.multiobjective.wfg.WFG2";
      referenceParetoFront = "jmetal-problem/src/test/resources/pareto_fronts/ZDT3.pf";
    }

    problem = ProblemUtils.loadProblem(problemName);

    double crossoverProbability = 0.9;
    double crossoverDistributionIndex = 20.0;
    crossover = new SBXCrossover(crossoverProbability, crossoverDistributionIndex);

    double mutationProbability = 1.0 / problem.getNumberOfVariables();
    double mutationDistributionIndex = 20.0;
    mutation = new PolynomialMutation(mutationProbability, mutationDistributionIndex);

    ESPEABuilder builder = new ESPEABuilder<>(problem, crossover, mutation);
    builder.setMaxEvaluations(25000);
    builder.setPopulationSize(100);
    builder.setReplacementStrategy(ReplacementStrategy.WORST_IN_ARCHIVE);

//    ScalarizationWrapper wrapper = new ScalarizationWrapper(ScalarizationType.TRADEOFF_UTILITY);
//    builder.setScalarization(wrapper);

    algorithm = builder.build();

    AlgorithmRunner algorithmRunner = new AlgorithmRunner.Executor(algorithm)
            .execute();

    List population = algorithm.getResult();
    long computingTime = algorithmRunner.getComputingTime();

    JMetalLogger.logger.info("Total execution time: " + computingTime + "ms");

    printFinalSolutionSet(population);
    if (!referenceParetoFront.equals("")) {
      printQualityIndicators(population, referenceParetoFront);
    }
  }
}