org.jgap.gp.function

Class ADF

java.lang.Object

org.jgap.gp.CommandGene

org.jgap.gp.function.ADF

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable

public class ADF
extends CommandGene

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

Since:

3.0

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.jgap.gp.CommandGene

CommandGene.COMMAND_TYPE

Field Summary

Fields inherited from class org.jgap.gp.CommandGene

BooleanClass, CharacterClass, DELTA, DoubleClass, FloatClass, IntegerClass, LongClass, nodeIndex, VoidClass

Constructor Summary

Constructors

Constructor and Description
ADF(GPConfiguration a_conf, int a_chromosomeNum, int a_arity) Constructor.

Method Summary

Modifier and Type	Method and Description
int	compareTo(java.lang.Object a_other) The compareTo-method.
boolean	equals(java.lang.Object a_other) The equals-method.
boolean	execute_boolean(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node as a boolean.
double	execute_double(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node as a double.
float	execute_float(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node as a float.
int	execute_int(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node as an integer.
java.lang.Object	execute_object(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node as an object.
int	getArity(IGPProgram a_individual) Arity of the command.
java.lang.Class	getChildType(IGPProgram a_ind, int i) Gets the type of node allowed from the given child number.
int	getChromosomeNum()
boolean	isValid(ProgramChromosome a_chrom) Subclasses capable of validating programs should overwrite this method.
java.lang.String	toString()

Methods inherited from class org.jgap.gp.CommandGene

cleanup, dynamizeArity, ensureUniqueness, ensureUniqueness, ensureUniqueness2, execute_long, execute_void, execute, getAllele, getApplicationData, getEnergy, getGPConfiguration, getName, getPersistentRepresentation, getReturnType, getSubChildType, getSubChildTypes, getSubReturnType, hashCode, isAffectGlobalState, isCompareApplicationData, isFloatType, isIntegerType, isValid, setAllele, setApplicationData, setCompareApplicationData, setEnergy, setNoValidation, setReturnType, setToRandomValue, setValueFromPersistentRepresentation, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ADF

public ADF(GPConfiguration a_conf,
           int a_chromosomeNum,
           int a_arity)
    throws InvalidConfigurationException

Constructor.

Parameters:

a_conf - the configuration to use

a_chromosomeNum - the index of the chromosome to execute

a_arity - the arity of the ADF

Throws:

InvalidConfigurationException

Since:

3.0

Method Detail

getChromosomeNum

public int getChromosomeNum()

Returns:

the index of the chromosome to execute

Since:

3.0

toString

public java.lang.String toString()

Specified by:

toString in class CommandGene

Returns:

the string representation of the command. Especially usefull to output a resulting formula in human-readable form.

getArity

public int getArity(IGPProgram a_individual)

Description copied from class: CommandGene

Arity of the command. Override if necessary. The arity is the number of children a node has.

Overrides:

getArity in class CommandGene

Parameters:

a_individual - the invididual the command's arity may depend on (in most cases the arity will not depend on the individual)

Returns:

arity of the command

execute_int

public int execute_int(ProgramChromosome c,
                       int n,
                       java.lang.Object[] args)

Description copied from class: CommandGene

Executes this node as an integer. Override to implement.

Overrides:

execute_int in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

Returns:

nothing but exception

execute_boolean

public boolean execute_boolean(ProgramChromosome c,
                               int n,
                               java.lang.Object[] args)

Description copied from class: CommandGene

Executes this node as a boolean. Override to implement.

Overrides:

execute_boolean in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

Returns:

nothing but exception

execute_float

public float execute_float(ProgramChromosome c,
                           int n,
                           java.lang.Object[] args)

Description copied from class: CommandGene

Executes this node as a float. Override to implement.

Overrides:

execute_float in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

Returns:

nothing but exception

execute_double

public double execute_double(ProgramChromosome c,
                             int n,
                             java.lang.Object[] args)

Description copied from class: CommandGene

Executes this node as a double. Override to implement.

Overrides:

execute_double in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

Returns:

nothing but exception

execute_object

public java.lang.Object execute_object(ProgramChromosome c,
                                       int n,
                                       java.lang.Object[] args)

Description copied from class: CommandGene

Executes this node as an object. Override to implement.

Overrides:

execute_object in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

Returns:

nothing but exception

getChildType

public java.lang.Class getChildType(IGPProgram a_ind,
                                    int i)

Description copied from class: CommandGene

Gets the type of node allowed from the given child number. Should be overridden in subclasses.

Overrides:

getChildType in class CommandGene

Parameters:

a_ind - the individual the child belongs to

i - the chromosome number

Returns:

the type of node allowed for that child, or null of no child exists

isValid

public boolean isValid(ProgramChromosome a_chrom)

Description copied from class: CommandGene

Subclasses capable of validating programs should overwrite this method. See class Push as a sample.

Overrides:

isValid in class CommandGene

Parameters:

a_chrom - the ProgramChromosome to validate

Returns:

true: a_program is (superficially) valid with the current Command

compareTo

public int compareTo(java.lang.Object a_other)

The compareTo-method.

Specified by:

compareTo in interface java.lang.Comparable

Overrides:

compareTo in class CommandGene

Parameters:

a_other - the other object to compare

Returns:

-1, 0, 1

Since:

3.0

equals

public boolean equals(java.lang.Object a_other)

The equals-method.

Overrides:

equals in class CommandGene

Parameters:

a_other - the other object to compare

Returns:

true if the objects are seen as equal

Since:

3.0