Package jeco.core.problem

Class GrammaticalEvolutionAbstractProblem

java.lang.Object

jeco.core.problem.Problem<Variable<Integer>>

jeco.core.problem.GrammaticalEvolutionAbstractProblem

Direct Known Subclasses:

GrammaticalEvolutionProblem, GrammaticalEvolutionProblemSimple, GrammaticalEvolutionStaticModel, GrammaticalEvolutionTemporalModel

public abstract class GrammaticalEvolutionAbstractProblem
extends Problem<Variable<Integer>>

Abstract class for grammatical evolution problems.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	CHROMOSOME_LENGTH_DEFAULT	Default length of the chromosome.
static final int	CODON_UPPER_BOUND_DEFAULT	Default upper bound for the codons.
protected boolean	correctSol	Correct solution or not.
protected int	currentIdx	Current index.
protected int	currentWrp	Current wrapping.
static final int	MAX_CNT_WRAPPINGS_DEFAULT	Default maximum number of wrappings.
protected int	maxCntWrappings	Maximum number of wrappings.
static final int	NUM_OF_OBJECTIVES_DEFAULT	Default number of objectives.
protected String	pathToBnf	Path to the BNF file.
protected BnfReader	reader	BNF reader.

Fields inherited from class jeco.core.problem.Problem

INFINITY, lowerBound, numberOfObjectives, numberOfVariables, upperBound

Constructor Summary

Constructors

Constructor	Description
GrammaticalEvolutionAbstractProblem(String pathToBnf)	Constructor.
GrammaticalEvolutionAbstractProblem(String pathToBnf, int numberOfObjectives)	Constructor.
GrammaticalEvolutionAbstractProblem(String pathToBnf, int numberOfObjectives, int chromosomeLength, int maxCntWrappings, int codonUpperBound)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	evaluate(Solution<Variable<Integer>> solution)	Function to evaluate a solution.
abstract void	evaluate(Solution<Variable<Integer>> solution, GrammaticalEvolutionPhenotype phenotype)	Evaluate the solution.
void	evaluate(Solutions<Variable<Integer>> solutions)	Function to evaluate a set of solutions.
GrammaticalEvolutionPhenotype	generatePhenotype(Solution<Variable<Integer>> solution)	Generate the phenotype of the solution.
Solutions<Variable<Integer>>	newRandomSetOfSolutions(int size)	Function to create a new random set of solutions.
void	processProduction(Production currentProduction, Solution<Variable<Integer>> solution, LinkedList<String> phenotype)	Process the production.

Methods inherited from class jeco.core.problem.Problem

clone, getLowerBound, getNumberOfObjectives, getNumberOfVariables, getUpperBound

Methods inherited from class java.lang.Object

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

Field Details

CHROMOSOME_LENGTH_DEFAULT

public static final int CHROMOSOME_LENGTH_DEFAULT

Default length of the chromosome.

See Also:

• Constant Field Values

CODON_UPPER_BOUND_DEFAULT

public static final int CODON_UPPER_BOUND_DEFAULT

Default upper bound for the codons.

See Also:

• Constant Field Values

MAX_CNT_WRAPPINGS_DEFAULT

public static final int MAX_CNT_WRAPPINGS_DEFAULT

Default maximum number of wrappings.

See Also:

• Constant Field Values

NUM_OF_OBJECTIVES_DEFAULT

public static final int NUM_OF_OBJECTIVES_DEFAULT

Default number of objectives.

See Also:

• Constant Field Values

pathToBnf

protected String pathToBnf

Path to the BNF file.

reader

protected BnfReader reader

BNF reader.

maxCntWrappings

protected int maxCntWrappings

Maximum number of wrappings.

currentIdx

protected int currentIdx

Current index.

currentWrp

protected int currentWrp

Current wrapping.

correctSol

protected boolean correctSol

Correct solution or not.

Constructor Details

GrammaticalEvolutionAbstractProblem

public GrammaticalEvolutionAbstractProblem(String pathToBnf,
 int numberOfObjectives,
 int chromosomeLength,
 int maxCntWrappings,
 int codonUpperBound)

Constructor.

Parameters:

pathToBnf - Path to the BNF file.

numberOfObjectives - Number of objectives.

chromosomeLength - Length of the chromosome.

maxCntWrappings - Maximum number of wrappings.

codonUpperBound - Upper bound for the codons.

GrammaticalEvolutionAbstractProblem

public GrammaticalEvolutionAbstractProblem(String pathToBnf,
 int numberOfObjectives)

Constructor.

Parameters:

pathToBnf - Path to the BNF file.

numberOfObjectives - Number of objectives.

GrammaticalEvolutionAbstractProblem

public GrammaticalEvolutionAbstractProblem(String pathToBnf)

Constructor.

Parameters:

pathToBnf - Path to the BNF file.

Method Details

evaluate

public abstract void evaluate(Solution<Variable<Integer>> solution,
 GrammaticalEvolutionPhenotype phenotype)

Evaluate the solution.

Parameters:

solution - Solution to evaluate.

phenotype - Phenotype of the solution.

evaluate

public void evaluate(Solutions<Variable<Integer>> solutions)

Description copied from class: Problem

Function to evaluate a set of solutions.

Overrides:

evaluate in class Problem<Variable<Integer>>

Parameters:

solutions - Set of solutions to evaluate.

evaluate

public void evaluate(Solution<Variable<Integer>> solution)

Description copied from class: Problem

Function to evaluate a solution.

Specified by:

evaluate in class Problem<Variable<Integer>>

Parameters:

solution - Solution to evaluate.

generatePhenotype

public GrammaticalEvolutionPhenotype generatePhenotype(Solution<Variable<Integer>> solution)

Generate the phenotype of the solution.

Parameters:

solution - Solution.

Returns:

Phenotype of the solution.

processProduction

public void processProduction(Production currentProduction,
 Solution<Variable<Integer>> solution,
 LinkedList<String> phenotype)

Process the production.

Parameters:

currentProduction - Current production.

solution - Solution.

phenotype - Phenotype.

newRandomSetOfSolutions

public Solutions<Variable<Integer>> newRandomSetOfSolutions(int size)

Description copied from class: Problem

Function to create a new random set of solutions.

Specified by:

newRandomSetOfSolutions in class Problem<Variable<Integer>>

Parameters:

size - Size of the set.

Returns:

New random set of solutions.