Package net.bmahe.genetics4j.gp.chromosomes.factory

Class ProgramTreeChromosomeFactory

java.lang.Object

net.bmahe.genetics4j.gp.chromosomes.factory.ProgramTreeChromosomeFactory

All Implemented Interfaces:

ChromosomeFactory<TreeChromosome<Operation<?>>>

public class ProgramTreeChromosomeFactory
extends Object
implements ChromosomeFactory<TreeChromosome<Operation<?>>>

Field Summary

Fields

Modifier and Type	Field	Description
private final ProgramGenerator	programGenerator

Constructor Summary

Constructors

Constructor	Description
ProgramTreeChromosomeFactory(ProgramGenerator _programGenerator)

Method Summary

Modifier and Type	Method	Description
boolean	canHandle(ChromosomeSpec chromosomeSpec)	Determines if this factory can create chromosomes for the given specification.
TreeChromosome<Operation<?>>	generate(ChromosomeSpec chromosomeSpec)	Creates a new chromosome instance based on the provided specification.

Methods inherited from class java.lang.Object

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

Field Details

programGenerator

private final ProgramGenerator programGenerator

Constructor Details

ProgramTreeChromosomeFactory

public ProgramTreeChromosomeFactory(ProgramGenerator _programGenerator)

Method Details

canHandle

public boolean canHandle(ChromosomeSpec chromosomeSpec)

Description copied from interface: ChromosomeFactory

Determines if this factory can create chromosomes for the given specification.

This method implements the type-checking logic that allows the factory system to automatically select the appropriate factory for each chromosome specification. Implementations typically check if the specification is of the expected type.

The method should be:

• Fast: Called frequently during factory selection
• Accurate: Return true only if generation will succeed
• Safe: Handle null and unexpected specification types gracefully

Specified by:

canHandle in interface ChromosomeFactory<TreeChromosome<Operation<?>>>

Parameters:

chromosomeSpec - the chromosome specification to evaluate

Returns:

true if this factory can generate chromosomes for the given specification, false otherwise

generate

public TreeChromosome<Operation<?>> generate(ChromosomeSpec chromosomeSpec)

Description copied from interface: ChromosomeFactory

Creates a new chromosome instance based on the provided specification.

This method implements the core factory logic, creating and initializing a new chromosome according to the parameters defined in the specification. The generated chromosome should be ready for use in genetic operations.

The generation process typically involves:

• Extracting parameters from the specification (size, bounds, constraints)
• Generating random values within the specified constraints
• Creating and initializing the chromosome instance
• Validating that the result meets all requirements

Implementation requirements:

• Specification compatibility: Only call after ChromosomeFactory.canHandle(net.bmahe.genetics4j.core.spec.chromosome.ChromosomeSpec) returns true
• Randomization: Use appropriate random number generation for initialization
• Constraint compliance: Ensure generated values respect specification bounds
• Thread safety: Support concurrent calls in multi-threaded environments

Specified by:

generate in interface ChromosomeFactory<TreeChromosome<Operation<?>>>

Parameters:

chromosomeSpec - the specification defining the chromosome to create

Returns:

a newly created chromosome instance conforming to the specification