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File org.dgpf.gp.netautomaton.fitness.ProcessedPressure.java

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/*
 * Copyright (c) 2006 Thomas Weise
 * 
 * E-Mail           : tweise@gmx.de
 * Creation Date    : 2006-06-02 21:18:06
 * Original Filename: org.dgpf.gp.netautomaton.fitness.ProcessedPressure.java
 * Version          : 1.0.0
 * Last modification: 2006-06-02
 *                by: Thomas Weise
 * 
 * License          : GNU LESSER GENERAL PUBLIC LICENSE
 *                    Version 2.1, February 1999
 *                    You should have received a copy of this license along
 *                    with this library; if not, write to the Free Software
 *                    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *                    MA 02111-1307, USA or download the license under
 *                    http://www.gnu.org/copyleft/lesser.html.
 *                    
 * Warranty         : This software is provided "as is" without any
 *                    warranty; without even the implied warranty of
 *                    merchantability or fitness for a particular purpose.
 *                    See the Gnu Lesser General Public License for more
 *                    details.
 */

 
package org.dgpf.gp.netautomaton.fitness;

import org.dgpf.gp.automaton.base.Program;
import org.dgpf.gp.netautomaton.base.NetContext;
import org.dgpf.gp.netautomaton.base.NetSupport;
import org.dgpf.search.api.FitnessData;
import org.dgpf.search.api.FitnessFunction;
import org.dgpf.search.api.SearchContext;

/**
 * This fitness function applies pressure in a way that forces messages to
 * really get processed.
 *
 * @author Thomas Weise
 */

public final  class   ProcessedPressure
              extends FitnessFunction<Program, FitnessData<Program>>
  {
/**
 * The globally shared instance of the message processing pressure fitness
 * function.
 */

  public  static  final FitnessFunction<Program, FitnessData<Program>>
    DEFAULT_INSTANCE = new ProcessedPressure(-1);
  
/**
 * Create a new message processing pressure fitness function.
 * 
 * @param p_precision   The precision of this fitness function. This is the
 *                      count of levels to be used for the calculation.
 *                      If this parameter is <= 0.0d, the full precision
 *                      available will be used.
 */

  private ProcessedPressure(final double p_precision)
    {
    super(-1, p_precision);
    }
  
/**
 * This method is called when a simulation has come to an end.
 * You must use this method to store a fitness value into the fitness
 * record <code>p_fitness</code>. Use <code>set_fitness</code> for this.
 * @param p_fitness       The fitness data record that was used in this
 *                        simulation.
 * @param p_context       The context that has driven the simulation.
 * @see FitnessData#set_fitness(double)
 */

  @Override
  protected  final  void end_simulation(
                            final FitnessData<Program>    p_fitness,
                            final SearchContext<Program>  p_context)
    {
    NetSupport  l_c;
    long        l_l, l_l2;
    
    l_c  = ((NetContext)p_context).get_net_support();
    l_l  = l_c.get_processed_count();
    l_l2 = (l_c.get_dispatch_count() - l_l);
    p_fitness.set_fitness(((l_l2 <= 0) ? l_l : (l_l / ((double)(l_l2*l_l2)))));
    }
  
/**
 * Returns a human readable name of this fitness function.
 * @return A human readable name of this fitness function.
 */

  @Override
  public  final  String  toString  ()
    {
    return "processing";
    }

  }

File Information:

file name:ProcessedPressure.java
package:org.dgpf.gp.netautomaton.fitness
qualified name:org.dgpf.gp.netautomaton.fitness.ProcessedPressure.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/dgpf/gp/netautomaton/fitness/ProcessedPressure.java
size:3.470 KB (3554 B)
uploaded: 2015-07-22 04:10:55 GMT+0000
last update: 2006-08-22 11:00:35 GMT+0000
last access: 2017-11-19 05:05:08 GMT+0000

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