org.opt4j.optimizer.ea

Class ElitismSelector

java.lang.Object

org.opt4j.optimizer.ea.ElitismSelector

All Implemented Interfaces:

Selector

public class ElitismSelector
extends Object
implements Selector

The ElitismSelector is a single objective elitism select. If a multi-objective problem is optimized, the objectives are summed up to a single value.

Author:

lukasiewycz

Constructor Summary

Constructors

Constructor and Description
ElitismSelector(Rand random) Constructs an ElitismSelector.

Method Summary

Modifier and Type	Method and Description
Collection<Individual>	getLames(int lambda, Collection<Individual> population) Selects a subset of lambda Individuals and returns it as a new Collection.
Collection<Individual>	getParents(int mu, Collection<Individual> population) Selects a subset of Individuals and returns it as a new Collection.
void	init(int maxsize) Sets the maximal number of Individuals.

Methods inherited from class java.lang.Object

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

Constructor Detail

ElitismSelector

@Inject
public ElitismSelector(Rand random)

Constructs an ElitismSelector.

Parameters:

random - the random number generator

Method Detail

getLames

public Collection<Individual> getLames(int lambda,
                                       Collection<Individual> population)

Description copied from interface: Selector

Selects a subset of lambda Individuals and returns it as a new Collection. These individuals can be erased in the next generation.

Specified by:

getLames in interface Selector

Parameters:

lambda - the number of lames to select

population - the list of individuals

Returns:

the worst lambda individuals

getParents

public Collection<Individual> getParents(int mu,
                                         Collection<Individual> population)

Description copied from interface: Selector

Selects a subset of Individuals and returns it as a new Collection. These so called parents can be used to form the next generation.

Specified by:

getParents in interface Selector

Parameters:

mu - the number of parents to select

population - the list of individuals

Returns:

the parents

init

public void init(int maxsize)

Description copied from interface: Selector

Sets the maximal number of Individuals.

Specified by:

init in interface Selector

Parameters:

maxsize - the number of individuals