Package org.uma.jmetal.operator.selection.impl

Class RankingAndCrowdingSelection<S extends Solution<?>>

java.lang.Object

org.uma.jmetal.operator.selection.impl.RankingAndCrowdingSelection<S>

All Implemented Interfaces:

Serializable, Operator<List<S>,List<S>>, SelectionOperator<List<S>,List<S>>

Direct Known Subclasses:

RankingAndDirScoreSelection

public class RankingAndCrowdingSelection<S extends Solution<?>>
extends Object
implements SelectionOperator<List<S>,List<S>>

This class implements a selection for selecting a number of solutions from a solution list. The solutions are taken by mean of its ranking and crowding distance values.

Author:

Antonio J. Nebro, Juan J. Durillo

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
RankingAndCrowdingSelection(int solutionsToSelect)	Constructor
RankingAndCrowdingSelection(int solutionsToSelect, Comparator<S> dominanceComparator)	Constructor

Method Summary

Modifier and Type	Method	Description
protected void	addLastRankedSolutionsToPopulation(Ranking<S> ranking, int rank, List<S> population)
protected void	addRankedSolutionsToPopulation(Ranking<S> ranking, int rank, List<S> population)
protected List<S>	crowdingDistanceSelection(Ranking<S> ranking)
List<S>	execute(List<S> solutionList)	Execute() method
int	numberOfSolutionsToSelect()
protected boolean	subfrontFillsIntoThePopulation(Ranking<S> ranking, int rank, List<S> population)

Methods inherited from class java.lang.Object

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

Constructor Details

RankingAndCrowdingSelection

public RankingAndCrowdingSelection(int solutionsToSelect,
 Comparator<S> dominanceComparator)

Constructor

RankingAndCrowdingSelection

public RankingAndCrowdingSelection(int solutionsToSelect)

Constructor

Method Details

numberOfSolutionsToSelect

public int numberOfSolutionsToSelect()

execute

public List<S> execute(List<S> solutionList)
                throws JMetalException

Execute() method

Specified by:

execute in interface Operator<List<S extends Solution<?>>,List<S extends Solution<?>>>

Parameters:

solutionList - The data to process

Throws:

JMetalException

crowdingDistanceSelection

protected List<S> crowdingDistanceSelection(Ranking<S> ranking)

subfrontFillsIntoThePopulation

protected boolean subfrontFillsIntoThePopulation(Ranking<S> ranking,
 int rank,
 List<S> population)

addRankedSolutionsToPopulation

protected void addRankedSolutionsToPopulation(Ranking<S> ranking,
 int rank,
 List<S> population)

addLastRankedSolutionsToPopulation

protected void addLastRankedSolutionsToPopulation(Ranking<S> ranking,
 int rank,
 List<S> population)