gpsys.primitives
Class Sub

java.lang.Object
  |
  +--gpsys.Primitive
        |
        +--gpsys.Function
              |
              +--gpsys.primitives.Sub

public class Sub

extends Function

	<typeX> Sub(<typeX> lvalue, <typeX> rvalue)
 

Sub is a generic function that returns the result of subtracting both arguments. Sub needs to be Type instantiated during construction to work with particular argument Types. The supported argument Types include BYTE, SHORT, INT, LONG, FLOAT and DOUBLE.

Version:

$Revision: 1.1 $, $Date: 2000/07/05 16:24:33 $

Author:

Adil Qureshi

Department of Computer Science,

University College London,

Gower St,

London WC1E 6BT,

UK.

See Also:

Type, Primitive, Function, Serialized Form

Fields inherited from class gpsys.Function

argTypes

Fields inherited from class gpsys.Primitive

type

Constructor Summary

Sub(Type type)
Constructs a Sub Function that works with the specified Type.

Method Summary

byte	evaluateByte(Individual i, Gene[] arguments) Used to subtract arguments of BYTE Types.
double	evaluateDouble(Individual i, Gene[] arguments) Used to subtract arguments of DOUBLE Types.
float	evaluateFloat(Individual i, Gene[] arguments) Used to subtract arguments of FLOAT Types.
int	evaluateInt(Individual i, Gene[] arguments) Used to subtract arguments of INT Types.
long	evaluateLong(Individual i, Gene[] arguments) Used to subtract arguments of LONG Types.
short	evaluateShort(Individual i, Gene[] arguments) Used to subtract arguments of SHORT Types.
Primitive	instance() Creates an instance of this Sub object.
java.lang.String	toString() Returns a String representation of this Function.

Methods inherited from class gpsys.Function

evaluateBoolean, evaluateChar, evaluateObject

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, wait, wait, wait

Constructor Detail

Sub

public Sub(Type type)

Constructs a Sub Function that works with the specified Type. The supported Types include BYTE, SHORT, INT, LONG, FLOAT and DOUBLE.

Parameters:

type - The Type of this Sub Function.

Method Detail

evaluateByte

public final byte evaluateByte(Individual i,
                               Gene[] arguments)
                        throws EvaluationException

Used to subtract arguments of BYTE Types.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be added.

Returns:

A byte representing the difference of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateByte in class Function

evaluateShort

public final short evaluateShort(Individual i,
                                 Gene[] arguments)
                          throws EvaluationException

Used to subtract arguments of SHORT Types.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be added.

Returns:

A short representing the difference of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateShort in class Function

evaluateInt

public final int evaluateInt(Individual i,
                             Gene[] arguments)
                      throws EvaluationException

Used to subtract arguments of INT Types.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be added.

Returns:

An int representing the difference of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateInt in class Function

evaluateLong

public final long evaluateLong(Individual i,
                               Gene[] arguments)
                        throws EvaluationException

Used to subtract arguments of LONG Types.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be added.

Returns:

A long representing the difference of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateLong in class Function

evaluateFloat

public final float evaluateFloat(Individual i,
                                 Gene[] arguments)
                          throws EvaluationException

Used to subtract arguments of FLOAT Types.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be added.

Returns:

A float representing the difference of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateFloat in class Function

evaluateDouble

public final double evaluateDouble(Individual i,
                                   Gene[] arguments)
                            throws EvaluationException

Used to subtract arguments of DOUBLE Types.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be added.

Returns:

A double representing the difference of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateDouble in class Function

instance

public final Primitive instance()

Creates an instance of this Sub object. The Type instantiation is preserved so that if an INT Sub is being cloned, the clone will also be INT instantiated.

Returns:

A reference to this Object (yes the same object, since the type information is to be the same, there are therefore no instance variables to be modified.

Overrides:

instance in class Primitive

toString

public java.lang.String toString()

Returns a String representation of this Function.

Returns:

A String containing the name of the Function.

Overrides:

toString in class Primitive