Package net.bmahe.genetics4j.gp.mutation

Class TrimTreeMutator

java.lang.Object

net.bmahe.genetics4j.gp.mutation.TrimTreeMutator

All Implemented Interfaces:

Mutator

public class TrimTreeMutator
extends Object
implements Mutator

Field Summary

Fields

Modifier and Type	Field	Description
private final AbstractEAConfiguration	eaConfiguration
static final org.apache.logging.log4j.Logger	logger
private final ProgramGenerator	programGenerator
private final RandomGenerator	randomGenerator
private final TrimTree	trimTree

Constructor Summary

Constructors

Constructor	Description
TrimTreeMutator(ProgramGenerator _programGenerator, RandomGenerator _randomGenerator, AbstractEAConfiguration _eaConfiguration, TrimTree _trimTree)

Method Summary

Modifier and Type	Method	Description
protected TreeNode<Operation<?>>	duplicateAndMutate(Program program, TreeNode<Operation<?>> root, int maxDepth, int currentDepth)
private int	maxDepthValue(Program program, TrimTree trimTree)
Genotype	mutate(long generation, Genotype originalGenotype)	Applies mutation to the given genotype and returns a new mutated genotype.

Methods inherited from class java.lang.Object

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

Field Details

logger

public static final org.apache.logging.log4j.Logger logger

programGenerator

private final ProgramGenerator programGenerator

randomGenerator

private final RandomGenerator randomGenerator

eaConfiguration

private final AbstractEAConfiguration eaConfiguration

trimTree

private final TrimTree trimTree

Constructor Details

TrimTreeMutator

public TrimTreeMutator(ProgramGenerator _programGenerator,
 RandomGenerator _randomGenerator,
 AbstractEAConfiguration _eaConfiguration,
 TrimTree _trimTree)

Method Details

duplicateAndMutate

protected TreeNode<Operation<?>> duplicateAndMutate(Program program,
 TreeNode<Operation<?>> root,
 int maxDepth,
 int currentDepth)

maxDepthValue

private int maxDepthValue(Program program,
 TrimTree trimTree)

mutate

public Genotype mutate(long generation,
 Genotype originalGenotype)

Description copied from interface: Mutator

Applies mutation to the given genotype and returns a new mutated genotype.

The original genotype should not be modified; instead, a new genotype with the mutations applied should be returned. The specific mutation behavior depends on the implementation and the mutation policy being used.

Mutation may affect:

• Individual alleles within chromosomes (bit flips, value changes)
• Chromosome structure (for variable-length representations)
• Multiple chromosomes simultaneously

Specified by:

mutate in interface Mutator

Parameters:

generation - the current generation

originalGenotype - the genotype to mutate, must not be null

Returns:

a new genotype with mutations applied, never null