Package org.uma.evolver.parameter.factory

Class DoubleParameterFactory

java.lang.Object

org.uma.evolver.parameter.factory.DoubleParameterFactory

All Implemented Interfaces:

ParameterFactory<org.uma.jmetal.solution.doublesolution.DoubleSolution>

public class DoubleParameterFactory
extends Object
implements ParameterFactory<org.uma.jmetal.solution.doublesolution.DoubleSolution>

Factory class for creating and configuring categorical parameters specific to evolutionary algorithms that operate on DoubleSolution individuals. This factory implements the ParameterFactory interface to provide type-safe creation of various algorithm components and their parameters.

The factory supports the creation of parameters for different components including:

• Variation operators (crossover, mutation)
• Selection mechanisms
• Archiving strategies
• Solution initialization methods
• Density estimators
• And other algorithm-specific parameters

This implementation is specifically designed for algorithms working with double-encoded solutions and provides appropriate parameter types that are compatible with the DoubleSolution interface.

This implementation uses the Registry Pattern, allowing for dynamic registration of parameter creators and making it more extensible than a traditional switch-based factory.

Since:

1.0

Author:

Antonio J. Nebro

Constructor Summary

Constructors

Constructor	Description
DoubleParameterFactory()	Creates a new instance of DoubleParameterFactory with default parameter creators registered.

Method Summary

Modifier and Type	Method	Description
CategoricalParameter	createParameter(String parameterName, List<String> values)	Creates and returns a specific CategoricalParameter instance based on the provided parameter name.
DoubleParameterFactory	register(String type, Function<List<String>,CategoricalParameter> creator)	Registers a parameter creator for a specific parameter type.

Methods inherited from class java.lang.Object

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

Constructor Details

DoubleParameterFactory

public DoubleParameterFactory()

Creates a new instance of DoubleParameterFactory with default parameter creators registered.

Method Details

register

public DoubleParameterFactory register(String type,
 Function<List<String>,CategoricalParameter> creator)

Registers a parameter creator for a specific parameter type.

Parameters:

type - the parameter type to register

creator - the function that creates the parameter

Returns:

this factory instance for method chaining

Throws:

NullPointerException - if type or creator is null

createParameter

public CategoricalParameter createParameter(String parameterName,
 List<String> values)

Creates and returns a specific CategoricalParameter instance based on the provided parameter name.

If no specific creator is registered for the parameter name, a default CategoricalParameter with the given name and values will be created.

Specified by:

createParameter in interface ParameterFactory<org.uma.jmetal.solution.doublesolution.DoubleSolution>

Parameters:

parameterName - the name of the parameter to create (case-sensitive)

values - the list of possible string values for the parameter (must not be null or empty)

Returns:

an instance of CategoricalParameter corresponding to the specified parameter name

Throws:

IllegalArgumentException - if the values list is null or empty

See Also:

• CategoricalParameter