Package org.uma.evolver.metaoptimizationproblem.evaluationbudgetstrategy

Class RandomRangeEvaluationsStrategy

java.lang.Object

org.uma.evolver.metaoptimizationproblem.evaluationbudgetstrategy.RandomRangeEvaluationsStrategy

All Implemented Interfaces:

EvaluationBudgetStrategy

public class RandomRangeEvaluationsStrategy
extends Object
implements EvaluationBudgetStrategy

Implementation of EvaluationBudgetStrategy that generates random evaluation counts within a specified range. Each call to getEvaluations() returns a random value between minEvaluations and maxEvaluations (inclusive).

Author:

Antonio J. Nebro

Constructor Summary

Constructors

Constructor	Description
RandomRangeEvaluationsStrategy(int minEvaluations, int maxEvaluations)	Creates a new RandomRangeEvaluationsStrategy with the specified range.
RandomRangeEvaluationsStrategy(int minEvaluations, int maxEvaluations, Random random)	Creates a new RandomRangeEvaluationsStrategy with the specified range and random seed.

Method Summary

Modifier and Type	Method	Description
int	getEvaluations(int problemIndex)	Retrieves the number of evaluations to be performed for a specific problem.
int	getMaxEvaluations()	Returns the maximum number of evaluations.
int	getMinEvaluations()	Returns the minimum number of evaluations.
void	validate(int numberOfProblems)	Validates the configuration of the evaluation budget strategy against the number of problems.

Methods inherited from class java.lang.Object

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

Constructor Details

RandomRangeEvaluationsStrategy

public RandomRangeEvaluationsStrategy(int minEvaluations,
 int maxEvaluations)

Creates a new RandomRangeEvaluationsStrategy with the specified range.

Parameters:

minEvaluations - the minimum number of evaluations (inclusive)

maxEvaluations - the maximum number of evaluations (inclusive)

Throws:

IllegalArgumentException - if minEvaluations is not positive or is greater than maxEvaluations

RandomRangeEvaluationsStrategy

public RandomRangeEvaluationsStrategy(int minEvaluations,
 int maxEvaluations,
 Random random)

Creates a new RandomRangeEvaluationsStrategy with the specified range and random seed. This constructor is primarily for testing purposes.

Parameters:

minEvaluations - the minimum number of evaluations (inclusive)

maxEvaluations - the maximum number of evaluations (inclusive)

random - the random number generator to use

Throws:

NullPointerException - if random is null

IllegalArgumentException - if minEvaluations is not positive or is greater than maxEvaluations

Method Details

getEvaluations

public int getEvaluations(int problemIndex)

Description copied from interface: EvaluationBudgetStrategy

Retrieves the number of evaluations to be performed for a specific problem. The implementation should handle the logic for determining the evaluation count, which could be fixed, random, or based on some other criterion.

Specified by:

getEvaluations in interface EvaluationBudgetStrategy

Parameters:

problemIndex - the zero-based index of the problem in the problem list

Returns:

the number of evaluations to perform for the specified problem

validate

public void validate(int numberOfProblems)

Description copied from interface: EvaluationBudgetStrategy

Validates the configuration of the evaluation budget strategy against the number of problems. Implementations should throw an IllegalArgumentException if the configuration is invalid for the given number of problems.

Specified by:

validate in interface EvaluationBudgetStrategy

Parameters:

numberOfProblems - the total number of problems to be evaluated

getMinEvaluations

public int getMinEvaluations()

Returns the minimum number of evaluations.

Returns:

the minimum evaluations

getMaxEvaluations

public int getMaxEvaluations()

Returns the maximum number of evaluations.

Returns:

the maximum evaluations