/**
    * @(#)UniformCrossover.java
    * Copyright (C) 2008-2011 delhezi.com
    *
    * This class is released under the:
    * GNU Lesser General Public License (LGPL) version 3 or later.
    * http://www.gnu.org/copyleft/lesser.html
    */
   package com.delhezi.ga.crossover.standard;
  
  import com.delhezi.ga.Chromosome;
  import java.util.Random;
  import java.util.logging.Logger;
  
  /**
   * <code>UniformCrossover</code>: Krzyżowanie równomierne
   * Uniform Crossover (UX).
   * @version 1.0 2009-06-10
   * @author <a href="mailto:wojciech.wolszczak@delhezi.com">
   * Wojciech Wolszczak</a>
   */
  public class UniformCrossover implements com.delhezi.ga.crossover.ICrossover {
  
      /** Logger object. */
      private static final Logger LOGGER =
          Logger.getLogger(UniformCrossover.class.getName());
  
      /** Delhezi Error Code. */
      //private static final String DERC = "1-1.3-6-";
  
      /** Class name. */
      private static final String CLASS_NAME = UniformCrossover.class.getName();
  
      /**
       * Random.
       */
      private static Random random = new Random();
  
      /**
       * Krzyżowanie.
       * @param chromosome1 Chromosom.
       * @param chromosome2 Chromosom.
       * @since 1.0
       */
      public final void crossover(Chromosome chromosome1,
                                  Chromosome chromosome2) {
          LOGGER.entering(CLASS_NAME, "crossover",
                          new Object[] { chromosome1, chromosome2 });
  
          Object tmpCh;
          for (int i = 0; i < chromosome1.size(); i++) {
              boolean b = random.nextFloat() > 0.5;
              if (b) {
                  tmpCh = chromosome1.getGene(i);
                  chromosome1.setGene(i, chromosome2.getGene(i));
                  chromosome2.setGene(i, tmpCh);
              }
          }
          LOGGER.exiting(CLASS_NAME, "crossover",
                         new Object[] { chromosome1, chromosome2 });
      }
  }