defaultgenotypeinitializer.java

一个开源的用java开发的遗传算法的封装好的工程

/*
 * This file is part of JGAP.
 *
 * JGAP offers a dual license model containing the LGPL as well as the MPL.
 *
 * For licencing information please see the file license.txt included with JGAP
 * or have a look at the top of class org.jgap.Chromosome which representatively
 * includes the JGAP license policy applicable for any file delivered with JGAP.
 */
package org.jgap.distr.grid;

import org.jgap.*;

/**
 * Default implementation of IGenotypeInitializer.
 *
 * @author Klaus Meffert
 * @since 3.2
 */
public class DefaultGenotypeInitializer
    implements IGenotypeInitializer, Comparable {
  /** String containing the CVS revision. Read out via reflection!*/
  private final static String CVS_REVISION = "$Revision: 1.3 $";

  /**
   * Sets up a Genotype by adding the content of the given Population to it
   * and initializing the missing Chromosomes of the Genotype randomly.
   *
   * @param a_req a JGAPRequest object containing useful information
   * @param a_initialPop the Population to consider
   * @return the initialized Genotype
   * @throws Exception
   *
   * @author Klaus Meffert
   * @since 3.2
   */
  public Genotype setupGenotype(JGAPRequest a_req, Population a_initialPop)
      throws Exception {
    Genotype gen;
    Configuration conf = a_req.getConfiguration();
    if (a_initialPop == null || a_initialPop.size() < 1) {
      gen = Genotype.randomInitialGenotype(conf);
    }
    else {
      // Initialize genotype with given population.
      // ------------------------------------------
      gen = new Genotype(conf, a_initialPop);
      // Fill up population to get the desired size.
      // -------------------------------------------
      int size = conf.getPopulationSize() - a_initialPop.size();
      gen.fillPopulation(size);
    }
    return gen;
  }

  /**
   * @param a_other sic
   * @return as always
   *
   * @author Klaus Meffert
   * @since 3.2
   */
  public int compareTo(Object a_other) {
    if (a_other.getClass().equals(getClass())) {
      return 0;
    }
    else {
      return getClass().getName().compareTo(a_other.getClass().getName());
    }
  }
}