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File org.dgpf.search.api.p2p.CircularIndividualBuffer.java

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/*
 * Copyright (c) 2006 Thomas Weise
 *
 * E-Mail           : tweise@gmx.de
 * Creation Date    : 2006-04-10 10:37:05
 * Original Filename: org.dgpf.search.api.p2p.CircularIndividualBuffer.java
 * Version          : 2.0.0
 * Last modification: 2006-05-08
 *                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.search.api.p2p;

import java.io.Serializable;

import org.dgpf.search.api.Individual;
import org.dgpf.search.api.IndividualComparator;
import org.sfc.collections.CircularBuffer;

/**
 * The circular buffer used for emmigration and immigration
 *
 * @param <Genotype>  The genotype of the individuals evolved. It must be
 *                    serializable.
 *
 * @author Thomas Weise
 */

final class CircularIndividualBuffer<Genotype extends Serializable>
      extends CircularBuffer<Individual<Genotype>>
  {
/**
 * The individual comparator internally used.
 */

  IndividualComparator  m_comparator  ;

/**
 * Create a new circular buffer for at most a specified count of items of
 * the class <code>Individual&lt;Genotype&gt;</code>.
 * @param p_comparator  The comparator that should be used for internal
 *                      comparisons and/or selections.
 * @param p_size    The size of the buffer to allocate.
 * TODO: get rid of "@SuppressWarnings("unchecked")"
 */

  @SuppressWarnings("unchecked")
  CircularIndividualBuffer(
                final IndividualComparator  p_comparator,
                final int                   p_size)
    {
    super(((Class<Individual<Genotype>>)(Individual.class)), p_size);
    this.m_comparator = p_comparator;
    }

/**
 * This method will be called whenever the buffer overflows and an item
 * should be determined to be dropped. If none can be found, the new item
 * will be dropped. This method returns <code>true</code> if the specified
 * old item can be dropped and the new one can be buffered instead.
 * @param p_old_item    The old item to be maybe dropped.
 * @param p_new_item    The new item, which could possible replace the old
 *                      one.
 * @return  <code>true</code> if and only if the new item may replace the
 *          old one, <code>false</code> if the old item should be kept.
 */

  @Override
  protected final boolean can_drop  (final Individual<Genotype> p_old_item,
                                     final Individual<Genotype> p_new_item)
    {
    return (this.m_comparator.compare(p_new_item, p_old_item) < 0);
    }
  }

File Information:

file name:CircularIndividualBuffer.java
package:org.dgpf.search.api.p2p
qualified name:org.dgpf.search.api.p2p.CircularIndividualBuffer.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/dgpf/search/api/p2p/CircularIndividualBuffer.java
size:3.230 KB (3308 B)
uploaded: 2015-07-22 04:11:00 GMT+0000
last update: 2006-05-08 13:45:36 GMT+0000
last access: 2017-11-18 04:35:25 GMT+0000

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