org.evosuite.ga.operators.selection

Class SelectionFunction<T extends Chromosome>

java.lang.Object

org.evosuite.ga.operators.selection.SelectionFunction<T>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BinaryTournamentSelectionCrowdedComparison, FitnessProportionateSelection, MOSATournamentSelection, RankSelection, TournamentSelection

public abstract class SelectionFunction<T extends Chromosome>
extends Object
implements Serializable

Abstract base class of selection functions

Author:

Gordon Fraser

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	logger Constant logger
protected boolean	maximize Do we want to minimize or maximize fitness?

Constructor Summary

Constructors

Constructor and Description
SelectionFunction()

Method Summary

Modifier and Type	Method and Description
abstract int	getIndex(List<T> population) Return index of next offspring
boolean	isMaximize() isMaximize
T	select(List<T> population) Return two parents
List<T>	select(List<T> population, int number) Return n parents
void	setMaximize(boolean max) Are we maximizing or minimizing fitness?

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

Constant logger

maximize

protected boolean maximize

Do we want to minimize or maximize fitness?

Constructor Detail

SelectionFunction

public SelectionFunction()

Method Detail

getIndex

public abstract int getIndex(List<T> population)

Return index of next offspring

Parameters:

population - a List object.

Returns:

a int.

select

public T select(List<T> population)

Return two parents

Parameters:

population - a List object.

Returns:

a Chromosome object.

select

public List<T> select(List<T> population,
                      int number)

Return n parents

Parameters:

population - a List object.

number - n

Returns:

a List object.

setMaximize

public void setMaximize(boolean max)

Are we maximizing or minimizing fitness?

Parameters:

max - a boolean.

isMaximize

public boolean isMaximize()

isMaximize

Returns:

true is we have to maximize