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/*
 * Copyright (c) 2006 Thomas Weise
 * 
 * E-Mail           : tweise@gmx.de
 * Creation Date    : 2006-02-07 07:16:28
 * Original Filename: org.dgpf.netautomaton.expressions.CanSendMessageHandler.java
 * Version          : 2.2.1
 * Last modification: 2006-05-08
 * Last modified 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.expressions;

import org.dgpf.gp.automaton.base.Expression;
import org.dgpf.gp.automaton.search.ExpressionHandler;
import org.dgpf.gp.automaton.search.Mutator;
import org.dgpf.gp.automaton.search.ProgramContext;
import org.sfc.collections.Arrays;
import org.sfc.utils.Typesafe;

/**
 * The handler for the can-send-message expression.
 *
 * @author Thomas Weise
 */

final class CanSendMessageHandler extends ExpressionHandler<Expression>
  {
/**
 * The default expression mutator.
 */

  private static  final Mutator<Expression, Expression>   MUTATOR =
                        Typesafe.cast(Mutator.DEFAULT_MUTATOR);
  
/**
 * The internally shared instance of this handler.
 */

  static  final ExpressionHandler<Expression> INSTANCE = 
                                      new CanSendMessageHandler();
  
/**
 * Create a new has-word expression handler.
 */

  private CanSendMessageHandler()
    {
    super( Arrays.create(MUTATOR), new double[] {1.0d});
    }
    
/**
 * Create a new, random instance of the genotype.
 * 
 * @param p_context     The program context to be used.
 * @param p_decision    <code>true</code> if and only if the expression
 *                      required is a decisional expression.
 *                      <code>false</code> if it is an arithmetical
 *                      expression.
 * @param p_memory_size   The memory size currently available.
 *                        
 * @return  The random genotype instance.
 */

  @Override
  protected final Expression  create(final ProgramContext p_context,
                                     final boolean        p_decision,
                                     final int            p_memory_size)
    {
    return CanSendMessage.INSTANCE;
    }
  
  /**
 * Checks wether this expression handler is able to produce decisional or
 * non-decisional expressions.
 * 
 * @param p_decision    <code>true</code> if and only if the expressions
 *                      required are a decisional expression.
 *                      <code>false</code> if they are arithmetical
 *                      expression.
 *                        
 * @return  The newly created random genotype instance.
 */

  @Override
  public final boolean can_produce    (final boolean p_decision)
    {
    return p_decision;
    }           
  }

File Information:

file name:CanSendMessageHandler.java
package:org.dgpf.gp.netautomaton.expressions
qualified name:org.dgpf.gp.netautomaton.expressions.CanSendMessageHandler.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/dgpf/gp/netautomaton/expressions/CanSendMessageHandler.java
size:3.460 KB (3544 B)
uploaded: 2012-05-02 03:10:50 GMT+0000
last update: 2006-05-08 13:39:56 GMT+0000
last access: 2012-11-28 01:59:02 GMT+0000

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