org.jgap.gp.function

Class SubProgram

java.lang.Object

org.jgap.gp.CommandGene

org.jgap.gp.function.SubProgram

All Implemented Interfaces:

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

public class SubProgram
extends CommandGene
implements ICloneable, IMutateable

A connector for independent subprograms (subtrees). Each subtree except the last one must have a memory- or stack-modifying command (such as push or store), otherwise there is no connection between the subtrees (which would be useless bloating).

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
SubProgram(GPConfiguration a_conf, java.lang.Class[] a_types)
SubProgram(GPConfiguration a_conf, java.lang.Class[] a_types, boolean a_mutateable)
SubProgram(GPConfiguration a_conf, java.lang.Class[] a_types, int a_subReturnType, int[] a_subChildTypes)
SubProgram(GPConfiguration a_conf, java.lang.Class[] a_types, int a_subReturnType, int[] a_subChildTypes, boolean a_mutateable)
SubProgram(GPConfiguration a_conf, int a_arity, java.lang.Class a_types) Collage constructor: Create a sub program that has a_arity elements of the same type a_types.
SubProgram(GPConfiguration a_conf, int a_arity, java.lang.Class a_types, boolean a_mutateable) Collage constructor: Create a sub program that has a_arity elements of the same type a_types.
SubProgram(GPConfiguration a_conf, int a_arity, java.lang.Class a_types, int a_minArity, int a_maxArity, boolean a_mutateable)

Method Summary

Modifier and Type	Method and Description
CommandGene	applyMutation()
CommandGene	applyMutation(int index, double a_percentage) Mutates a CommandGene.
java.lang.Object	clone()
int	compareTo(java.lang.Object a_other) The compareTo-method.
boolean	equals(java.lang.Object a_other) The equals-method.
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) Executes this node as an object.
void	execute_void(ProgramChromosome c, int n, java.lang.Object[] args) Executes this node, returning nothing.
java.lang.Class	getChildType(IGPProgram a_ind, int a_chromNum) Gets the type of node allowed from the given child number.
java.lang.String	getName()
boolean	isValid(ProgramChromosome a_program) 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_boolean, execute, getAllele, getApplicationData, getArity, getEnergy, getGPConfiguration, 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

SubProgram

public SubProgram(GPConfiguration a_conf,
                  java.lang.Class[] a_types)
           throws InvalidConfigurationException

Throws:

InvalidConfigurationException

SubProgram

public SubProgram(GPConfiguration a_conf,
                  int a_arity,
                  java.lang.Class a_types)
           throws InvalidConfigurationException

Collage constructor: Create a sub program that has a_arity elements of the same type a_types.

Parameters:

a_conf - the configuration to use

a_arity - number of children in the collage

a_types - uniform type of all children

Throws:

InvalidConfigurationException

Since:

3.4

SubProgram

public SubProgram(GPConfiguration a_conf,
                  int a_arity,
                  java.lang.Class a_types,
                  boolean a_mutateable)
           throws InvalidConfigurationException

Collage constructor: Create a sub program that has a_arity elements of the same type a_types.

Parameters:

a_conf - the configuration to use

a_arity - number of children in the collage

a_types - uniform type of all children

a_mutateable - true: allow mutation of the sub program, i.e., the number of children (=arity) may be varied automatically during evolution

Throws:

InvalidConfigurationException

Since:

3.4

SubProgram

public SubProgram(GPConfiguration a_conf,
                  int a_arity,
                  java.lang.Class a_types,
                  int a_minArity,
                  int a_maxArity,
                  boolean a_mutateable)
           throws InvalidConfigurationException

Throws:

InvalidConfigurationException

SubProgram

public SubProgram(GPConfiguration a_conf,
                  java.lang.Class[] a_types,
                  boolean a_mutateable)
           throws InvalidConfigurationException

Throws:

InvalidConfigurationException

SubProgram

public SubProgram(GPConfiguration a_conf,
                  java.lang.Class[] a_types,
                  int a_subReturnType,
                  int[] a_subChildTypes)
           throws InvalidConfigurationException

Throws:

InvalidConfigurationException

SubProgram

public SubProgram(GPConfiguration a_conf,
                  java.lang.Class[] a_types,
                  int a_subReturnType,
                  int[] a_subChildTypes,
                  boolean a_mutateable)
           throws InvalidConfigurationException

Throws:

InvalidConfigurationException

Method Detail

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.

getName

public java.lang.String getName()

Overrides:

getName in class CommandGene

Returns:

textual name of this command

Since:

3.2

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_void

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

Description copied from class: CommandGene

Executes this node, returning nothing. Override to implement.

Overrides:

execute_void in class CommandGene

Parameters:

c - ignored here

n - ignored here

args - ignored here

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)

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

isValid

public boolean isValid(ProgramChromosome a_program)

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_program - the ProgramChromosome to validate

Returns:

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

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

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

clone

public java.lang.Object clone()

Specified by:

clone in interface ICloneable

Overrides:

clone in class java.lang.Object

Returns:

deep clone of this instance

Since:

3.2

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

applyMutation

public CommandGene applyMutation()
                          throws InvalidConfigurationException

Returns:

mutated command gene

Throws:

InvalidConfigurationException