Java tutorial
/* * This file is part of JGAP. * * JGAP offers a dual license model containing the LGPL as well as the MPL. * * For licensing 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.gp.function; import org.apache.commons.lang.builder.*; import org.jgap.*; import org.jgap.gp.*; import org.jgap.gp.impl.*; /** * Automatically Defined Function (ADF). Works with output of other chromosomes. * An ADF is automatically created by ProgramChromosome. * For more information about ADFs see John Koza's book on Genetic Programming. * Or google for "Koza ADF". * For a German explanation, see * see http://www.tu-chemnitz.de/informatik/ThIS/seminare/ws01/gp/singer.pdf * or * http://www.tu-chemnitz.de/informatik/ThIS/seminare/ws01/gp/forbriger.pdf * or * http://www.klaus-meffert.de/download/genetische_programmierung_mit_java.pdf * * @author Klaus Meffert * @since 3.0 */ public class ADF extends CommandGene // implements ICloneable { /** String containing the CVS revision. Read out via reflection!*/ private final static String CVS_REVISION = "$Revision: 1.19 $"; private int m_chromosomeNum; /** * Constructor. * * @param a_conf the configuration to use * @param a_chromosomeNum the index of the chromosome to execute * @param a_arity the arity of the ADF * * @throws InvalidConfigurationException * * @author Klaus Meffert * @since 3.0 */ public ADF(final GPConfiguration a_conf, int a_chromosomeNum, int a_arity) throws InvalidConfigurationException { super(a_conf, a_arity, null); m_chromosomeNum = a_chromosomeNum; } /** * @return the index of the chromosome to execute * * @author Klaus Meffert * @since 3.0 */ public int getChromosomeNum() { return m_chromosomeNum; } public String toString() { String res = "ADF" + m_chromosomeNum + "("; int size = size(); for (int i = 1; i <= size; i++) { res += "&" + i; if (i < size) { res += ","; } } res += ")"; return res; } public int getArity(IGPProgram a_individual) { if (a_individual == null || a_individual.size() <= m_chromosomeNum) { return 0; } return a_individual.getChromosome(m_chromosomeNum).getArity(); } public int execute_int(ProgramChromosome c, int n, Object[] args) { check(c); int numargs = c.getIndividual().getChromosome(m_chromosomeNum).getArity(); Object[] vals = new Object[numargs]; for (int i = 0; i < numargs; i++) { vals[i] = new Integer(c.execute_int(n, i, args)); } // Call the chromosome. // -------------------- return c.getIndividual().execute_int(m_chromosomeNum, vals); } public boolean execute_boolean(ProgramChromosome c, int n, Object[] args) { check(c); int numargs = c.getIndividual().getChromosome(m_chromosomeNum).getArity(); Object[] vals = new Object[numargs]; for (int i = 0; i < numargs; i++) { vals[i] = new Boolean(c.execute_boolean(n, i, args)); } return c.getIndividual().execute_boolean(m_chromosomeNum, vals); } public float execute_float(ProgramChromosome c, int n, Object[] args) { check(c); int numargs = c.getIndividual().getChromosome(m_chromosomeNum).getArity(); Object[] vals = new Object[numargs]; for (int i = 0; i < numargs; i++) { vals[i] = new Float(c.execute_float(n, i, args)); } return c.getIndividual().execute_float(m_chromosomeNum, vals); } public double execute_double(ProgramChromosome c, int n, Object[] args) { check(c); int numargs = c.getIndividual().getChromosome(m_chromosomeNum).getArity(); Object[] vals = new Object[numargs]; for (int i = 0; i < numargs; i++) { vals[i] = new Double(c.execute_double(n, i, args)); } return c.getIndividual().execute_double(m_chromosomeNum, vals); } public Object execute_object(ProgramChromosome c, int n, Object[] args) { check(c); int numargs = c.getIndividual().getChromosome(m_chromosomeNum).getArity(); Object[] vals = new Object[numargs]; for (int i = 0; i < numargs; i++) { vals[i] = c.execute(n, i, args); } return c.getIndividual().execute_object(m_chromosomeNum, vals); } public Class getChildType(IGPProgram a_ind, int i) { return a_ind.getChromosome(m_chromosomeNum).getArgTypes()[i]; } public boolean isValid(ProgramChromosome a_chrom) { // Avoid endless recursion. // ------------------------ StackTraceElement[] stack = new Exception().getStackTrace(); if (stack.length > 60) { /**@todo enhance*/ return false; } return true; } /** * The compareTo-method. * * @param a_other the other object to compare * @return -1, 0, 1 * * @author Klaus Meffert * @since 3.0 */ public int compareTo(Object a_other) { int result = super.compareTo(a_other); if (result != 0) { return result; } ADF other = (ADF) a_other; return new CompareToBuilder().append(m_chromosomeNum, other.m_chromosomeNum).toComparison(); } /** * The equals-method. * * @param a_other the other object to compare * @return true if the objects are seen as equal * * @author Klaus Meffert * @since 3.0 */ public boolean equals(Object a_other) { try { ADF other = (ADF) a_other; return super.equals(a_other) && new EqualsBuilder().append(m_chromosomeNum, other.m_chromosomeNum).isEquals(); } catch (ClassCastException cex) { return false; } } // /** // * Clones the object. // * // * @return cloned instance of this object // * // * @author Klaus Meffert // * @since 3.4 // */ // public Object clone() { // try { // ADF result = new ADF(getGPConfiguration(), m_chromosomeNum, getArity(INDIVIDUAL)); // return result; // } catch (Exception ex) { // throw new CloneException(ex); // } // } }