org.jgap.impl

Class StandardPostSelector

java.lang.Object

org.jgap.NaturalSelector

org.jgap.impl.StandardPostSelector

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Configurable, INaturalSelector, ICloneable

public class StandardPostSelector
extends NaturalSelector
implements ICloneable

Implementation of a NaturalSelector that is suited for being processed after genetic operators have been executed. It takes all chromosomes with no fitness value computed to the next generation. Then it takes the top n chromosomes from the remaining input into the next generation. Which chromosomes are the best is decided by evaluating their fitness value.

Since:

3.2

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.jgap.NaturalSelector

NaturalSelector.AgeFitnessValueComparator, NaturalSelector.FitnessAgeValueComparator, NaturalSelector.FitnessValueComparator

Constructor Summary

Constructors

Constructor and Description
StandardPostSelector() Default constructor.
StandardPostSelector(Configuration a_config) Constructor.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
void	empty() Empties out the working pool of chromosomes.
boolean	equals(java.lang.Object a_o)
boolean	returnsUniqueChromosomes()
void	select(int a_howManyToSelect, Population a_from_pop, Population a_to_pop) Selects a given number of Chromosomes from the pool that will move on to the next generation population.

Methods inherited from class org.jgap.NaturalSelector

getConfiguration

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardPostSelector

public StandardPostSelector()
                     throws InvalidConfigurationException

Default constructor.

Attention: The configuration used is the one set with the static method Genotype.setConfiguration.

Throws:

InvalidConfigurationException

Since:

3.2

StandardPostSelector

public StandardPostSelector(Configuration a_config)
                     throws InvalidConfigurationException

Constructor.

Parameters:

a_config - the configuration to use

Throws:

InvalidConfigurationException

Since:

3.2

Method Detail

select

public void select(int a_howManyToSelect,
                   Population a_from_pop,
                   Population a_to_pop)

Selects a given number of Chromosomes from the pool that will move on to the next generation population. This selection will be guided by the fitness values. The chromosomes with the best fitness value win.

Specified by:

select in interface INaturalSelector

Parameters:

a_from_pop - the population the Chromosomes will be selected from

a_to_pop - the population the Chromosomes will be added to

a_howManyToSelect - the number of Chromosomes to select

Since:

1.1

empty

public void empty()

Empties out the working pool of chromosomes.

Specified by:

empty in interface INaturalSelector

Since:

3.2

returnsUniqueChromosomes

public boolean returnsUniqueChromosomes()

Specified by:

returnsUniqueChromosomes in interface INaturalSelector

Returns:

always true as no chromosome can be returnd multiple times

Since:

3.2

equals

public boolean equals(java.lang.Object a_o)

Overrides:

equals in class java.lang.Object

clone

public java.lang.Object clone()

Specified by:

clone in interface ICloneable

Overrides:

clone in class java.lang.Object

Returns:

clone of the current object instance