gpsys
Class Terminal

java.lang.Object
  |
  +--gpsys.Primitive
        |
        +--gpsys.Terminal

Direct Known Subclasses:

ADF2Arg0, ADTerminal, ConstantDouble, ConstantFloat, ConstantVector2Mod8, False, Left, MemBoolean, MemByte, MemChar, MemDouble, MemFloat, MemInt, MemLong, MemObject, MemShort, Mow, One, True, XBoolean, XByte, XChar, XDouble, XFloat, XInt, XLong, XObject, XShort, Zero

public abstract class Terminal

extends Primitive

The super class of all GP Terminals. A Terminal is a primitive that take no arguments. This abstract class should be extended to create your own Terminals. One or more of the evaulation methods should be overridden to create the desired value. The reason the evaulation methods have not been declared abstract is to relieve the burden of subclasses having to define all of the different evaluation methods, when only one is needed.

Version:

$Revision: 1.1 $, $Date: 2000/07/05 16:21:25 $

Author:

Adil Qureshi

Department of Computer Science,

University College London,

Gower St,

London WC1E 6BT,

UK.

See Also:

Primitive, gpsys.primitive, Serialized Form

Fields inherited from class gpsys.Primitive

type

Constructor Summary

Terminal()

Method Summary

boolean	evaluateBoolean(Individual i) To be overridden by Terminals returning a boolean when evaluated.
byte	evaluateByte(Individual i) To be overridden by Terminals returning a byte when evaluated.
char	evaluateChar(Individual i) To be overridden by Terminals returning a char when evaluated.
double	evaluateDouble(Individual i) To be overridden by Terminals returning a double when evaluated.
float	evaluateFloat(Individual i) To be overridden by Terminals returning a float when evaluated.
int	evaluateInt(Individual i) To be overridden by Terminals returning an int when evaluated.
long	evaluateLong(Individual i) To be overridden by Terminals returning a long when evaluated.
java.lang.Object	evaluateObject(Individual i) To be overridden by Terminals returning an Object when evaluated.
short	evaluateShort(Individual i) To be overridden by Terminals returning a short when evaluated.

Methods inherited from class gpsys.Primitive

instance, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Terminal

public Terminal()

Method Detail

evaluateObject

public java.lang.Object evaluateObject(Individual i)
                                throws EvaluationException

To be overridden by Terminals returning an Object when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A reference to an Object which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateByte

public byte evaluateByte(Individual i)
                  throws EvaluationException

To be overridden by Terminals returning a byte when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A byte which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateShort

public short evaluateShort(Individual i)
                    throws EvaluationException

To be overridden by Terminals returning a short when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A short which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateInt

public int evaluateInt(Individual i)
                throws EvaluationException

To be overridden by Terminals returning an int when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

An int which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateLong

public long evaluateLong(Individual i)
                  throws EvaluationException

To be overridden by Terminals returning a long when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A long which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateFloat

public float evaluateFloat(Individual i)
                    throws EvaluationException

To be overridden by Terminals returning a float when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A float which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateDouble

public double evaluateDouble(Individual i)
                      throws EvaluationException

To be overridden by Terminals returning a double when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A double which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateChar

public char evaluateChar(Individual i)
                  throws EvaluationException

To be overridden by Terminals returning a char when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A char which is the evaluation result.

Throws:

EvaluationException - If this method is called.

evaluateBoolean

public boolean evaluateBoolean(Individual i)
                        throws EvaluationException

To be overridden by Terminals returning a boolean when evaluated.

Parameters:

i - the individual that is being evaluated.

Returns:

A boolean which is the evaluation result.

Throws:

EvaluationException - If this method is called.