/*
* 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.*;
import org.jgap.util.*;
/**
* The Greater Than (x > y) operation.
*
* @author Klaus Meffert
* @since 3.2
*/
public class GreaterThan
extends MathCommand implements ICloneable {
/** String containing the CVS revision. Read out via reflection!*/
private final static String CVS_REVISION = "$Revision: 1.4 $";
private Class m_type;
public GreaterThan(final GPConfiguration a_conf, Class a_type)
throws InvalidConfigurationException {
this(a_conf, a_type, 0, null);
}
public GreaterThan(final GPConfiguration a_conf, Class a_type,
int a_subReturnType,
int[] a_subChildTypes)
throws InvalidConfigurationException {
super(a_conf, 2, CommandGene.BooleanClass, a_subReturnType, a_subChildTypes);
m_type = a_type;
}
public String toString() {
return "&1 > &2";
}
/**
* @return textual name of this command
*
* @author Klaus Meffert
* @since 3.2
*/
public String getName() {
return "GreaterThan";
}
public boolean execute_boolean(ProgramChromosome c, int n, Object[] args) {
if (m_type == CommandGene.BooleanClass) {
return c.execute_boolean(n, 0, args) && !c.execute_boolean(n, 1, args);
}
else if (m_type == CommandGene.IntegerClass) {
return c.execute_int(n, 0, args) > c.execute_int(n, 1, args);
}
else if (m_type == CommandGene.LongClass) {
return c.execute_long(n, 0, args) > c.execute_long(n, 1, args);
}
else if (m_type == CommandGene.DoubleClass) {
return c.execute_double(n, 0, args) > c.execute_double(n, 1, args);
}
else if (m_type == CommandGene.FloatClass) {
return c.execute_float(n, 0, args) > c.execute_float(n, 1, args);
}
// else if (m_type == CommandGene.VoidClass) {
// // We could support Comparables
// return c.execute_object(n, 0, args).equals(c.execute_object(n, 1, args));
// }
throw new UnsupportedOperationException("Unsupported type " + m_type +
" for GreaterThan-command!");
}
public Class getChildType(IGPProgram a_ind, int a_index) {
return m_type;
}
/**
* Clones the object. Simple and straight forward implementation here.
*
* @return cloned instance of this object
*
* @author Klaus Meffert
* @since 3.4
*/
public Object clone() {
try {
GreaterThan result = new GreaterThan(getGPConfiguration(), m_type,
getSubReturnType(), getSubChildTypes());
return result;
} catch (Exception ex) {
throw new CloneException(ex);
}
}
/**
* The equals method.
*
* @param a_other the other object to compare
* @return true if the objects are seen as equal
*
* @author Frank Pape
* @since 3.4.3
*/
public boolean equals(Object a_other) {
if (a_other == null || ! (a_other instanceof GreaterThan)) {
return false;
}
if (!super.equals(a_other)) {
return false;
}
GreaterThan other = (GreaterThan) a_other;
return new EqualsBuilder().append(m_type, other.m_type).isEquals();
}
}