/* * 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 examples.gp.paintedDesert; import org.jgap.*; import org.jgap.gp.*; import org.jgap.gp.impl.*; /** * A four argument version of if-less-than-or-equal (IFLTE) construct. If the * first argument is less than the second argument, then return the third * argument, else the return the fourth argument. Mimics the Lisp function from * Koza. * * @author Scott Mueller * @since 3.2 */ public class IfLessThanOrEqual extends CommandGene { /** String containing the CVS revision. Read out via reflection!*/ private final static String CVS_REVISION = "$Revision: 1.2 $"; /** * Returns the type of the arguments for this function */ private Class m_type; /** * Creates the 4 argument IfLessThanOrEqual. * * @param a_conf * @param a_type * @throws InvalidConfigurationException */ public IfLessThanOrEqual(final GPConfiguration a_conf, Class a_type) throws InvalidConfigurationException { super(a_conf, 4, CommandGene.VoidClass); m_type = a_type; } /** * Reutrns the program listing name */ public String toString() { return "if(&1) <= (&2) then (&3) else(&4)"; } /** * @return textual name of this command * */ public String getName() { return "IfElse4Arg"; } /** * Executes the IfLessThanOrEqual for void arguments */ public void execute_void(ProgramChromosome c, int n, Object[] args) { check(c); boolean condition; if (m_type == CommandGene.IntegerClass) { condition = c.execute_int(n, 0, args) <= c.execute_int(n, 1, args); } else if (m_type == CommandGene.BooleanClass) { condition = c.execute_boolean(n, 0, args); } else if (m_type == CommandGene.LongClass) { condition = c.execute_long(n, 0, args) <= c.execute_long(n, 1, args); } else if (m_type == CommandGene.DoubleClass) { condition = c.execute_double(n, 0, args) <= c.execute_double(n, 1, args); } else if (m_type == CommandGene.FloatClass) { condition = c.execute_float(n, 0, args) <= c.execute_float(n, 1, args); } else { throw new IllegalStateException("IfElse: cannot process type " + m_type); } if (condition) { c.execute_void(n, 2, args); } else { c.execute_void(n, 3, args); } } /** * Determines which type a specific child of this command has. * * @param a_ind ignored here * @param a_chromNum index of child * @return type of the a_chromNum'th child * */ public Class getChildType(IGPProgram a_ind, int a_chromNum) { if (a_chromNum == 0 || a_chromNum == 1) { return m_type; } return CommandGene.VoidClass; } }