org.jgap.gp.terminal

Class Terminal

java.lang.Object

org.jgap.gp.CommandGene

org.jgap.gp.terminal.Terminal

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Comparable, IMutateable, ICloneable

public class Terminal
extends CommandGene
implements IMutateable, ICloneable

A terminal is a static number that can be mutated.

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
Terminal()
Terminal(GPConfiguration a_conf, java.lang.Class a_returnType)
Terminal(GPConfiguration a_conf, java.lang.Class a_returnType, double a_minValue, double a_maxValue) Constructor.
Terminal(GPConfiguration a_conf, java.lang.Class a_returnType, double a_minValue, double a_maxValue, boolean a_wholeNumbers) Constructor.
Terminal(GPConfiguration a_conf, java.lang.Class a_returnType, double a_minValue, double a_maxValue, boolean a_wholeNumbers, int a_subReturnType)
Terminal(GPConfiguration a_conf, java.lang.Class a_returnType, double a_minValue, double a_maxValue, boolean a_wholeNumbers, int a_subReturnType, boolean a_randomize)

Method Summary

Modifier and Type	Method and Description
CommandGene	applyMutation(int index, double a_percentage) Mutates a CommandGene.
java.lang.Object	clone() Clones the object.
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.
long	execute_long(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node as a long.
java.lang.Object	execute_object(ProgramChromosome c, int n, java.lang.Object[] args) Returns a string representation of the terminal.
java.lang.Class	getChildType(IGPProgram a_ind, int a_chromNum) Gets the type of node allowed from the given child number.
void	setValue(double a_value)
void	setValue(float a_value)
void	setValue(int a_value)
void	setValue(long a_value)
java.lang.String	toString()

Methods inherited from class org.jgap.gp.CommandGene

cleanup, compareTo, dynamizeArity, ensureUniqueness, ensureUniqueness, ensureUniqueness2, equals, execute_boolean, execute_void, execute, getAllele, getApplicationData, getArity, getEnergy, getGPConfiguration, getName, getPersistentRepresentation, getReturnType, getSubChildType, getSubChildTypes, getSubReturnType, hashCode, isAffectGlobalState, isCompareApplicationData, isFloatType, isIntegerType, isValid, 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

Terminal

public Terminal()
         throws InvalidConfigurationException

Throws:

InvalidConfigurationException

Terminal

public Terminal(GPConfiguration a_conf,
                java.lang.Class a_returnType)
         throws InvalidConfigurationException

Throws:

InvalidConfigurationException

Terminal

public Terminal(GPConfiguration a_conf,
                java.lang.Class a_returnType,
                double a_minValue,
                double a_maxValue)
         throws InvalidConfigurationException

Constructor.

Parameters:

a_conf - GPConfiguration

a_returnType - Class

a_minValue - double

a_maxValue - double

Throws:

InvalidConfigurationException

Since:

3.0

Terminal

public Terminal(GPConfiguration a_conf,
                java.lang.Class a_returnType,
                double a_minValue,
                double a_maxValue,
                boolean a_wholeNumbers)
         throws InvalidConfigurationException

Constructor.

Parameters:

a_conf - GPConfiguration

a_returnType - Class

a_minValue - double

a_maxValue - double

a_wholeNumbers - true: only return whole numbers (only relevant when using type double or float)

Throws:

InvalidConfigurationException

Since:

3.2

Terminal

public Terminal(GPConfiguration a_conf,
                java.lang.Class a_returnType,
                double a_minValue,
                double a_maxValue,
                boolean a_wholeNumbers,
                int a_subReturnType)
         throws InvalidConfigurationException

Throws:

InvalidConfigurationException

Terminal

public Terminal(GPConfiguration a_conf,
                java.lang.Class a_returnType,
                double a_minValue,
                double a_maxValue,
                boolean a_wholeNumbers,
                int a_subReturnType,
                boolean a_randomize)
         throws InvalidConfigurationException

Parameters:

a_conf - GPConfiguration

a_returnType - Class

a_minValue - double

a_maxValue - double

a_wholeNumbers - boolean

a_subReturnType - int

a_randomize - true: randomize initial value

Throws:

InvalidConfigurationException

Since:

3.4.1

Method Detail

setValue

public void setValue(double a_value)

setValue

public void setValue(float a_value)

setValue

public void setValue(int a_value)

setValue

public void setValue(long a_value)

applyMutation

public CommandGene applyMutation(int index,
                                 double a_percentage)
                          throws InvalidConfigurationException

Description copied from interface: IMutateable

Mutates a CommandGene.

Specified by:

applyMutation in interface IMutateable

Parameters:

index - references the part of a multipart object, normally not relevant

a_percentage - the mutation rate (0.0 to 1.0)

Returns:

the mutant

Throws:

InvalidConfigurationException

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.

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_long

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

Description copied from class: CommandGene

Executes this node as a long. Override to implement.

Overrides:

execute_long 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)

Returns a string representation of the terminal.

Overrides:

execute_object in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

Returns:

StringBuffer with textual representation of terminal's value

Since:

3.2

getChildType

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

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

a_chromNum - the chromosome number

Returns:

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

clone

public java.lang.Object clone()

Clones the object. Simple and straight forward implementation here.

Specified by:

clone in interface ICloneable

Overrides:

clone in class java.lang.Object

Returns:

cloned instance of this object

Since:

3.2