jenes.stage.operator.common

Class SteadyState<T extends Chromosome>

java.lang.Object

jenes.stage.AbstractStage<T>

jenes.stage.operator.Operator<T>

jenes.stage.operator.Crowder<T>

jenes.stage.operator.common.SteadyState<T>

public class SteadyState<T extends Chromosome>
extends Crowder<T>

This class implements a steady-state stage.

Since:

2.0

Version:

2.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SteadyState.ReplacementStrategy Replacement strategies

Nested classes/interfaces inherited from class jenes.stage.operator.Operator

Operator.Statistics

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_REPLACEMENT_RATE Default replacement rate
static SteadyState.ReplacementStrategy	DEFAULT_REPLACEMENT_STRATEGY Default replace strategy
static int	DEFAULT_SELECTION_RATE Defualt selection rate
protected int	replacementRate Replacement rate
protected SteadyState.ReplacementStrategy	replacementStrategy Replacement strategy
protected Selector<T>	selector Selector

Fields inherited from class jenes.stage.operator.Crowder

body, elitist

Fields inherited from class jenes.stage.operator.Operator

random, statistics

Fields inherited from class jenes.stage.AbstractStage

biggerIsBetter, fitness, ga

Constructor Summary

Constructors

Constructor and Description
SteadyState(int rr, int sr, Selector<T> selector, AbstractStage<T>... stages) Creates a SteadyState instance
SteadyState(Selector<T> selector, AbstractStage<T>... stages) Creates a SteadySate instance

Method Summary

Methods

Modifier and Type	Method and Description
SteadyState.ReplacementStrategy	getReplacementPolicy() Returns the replacement policy
int	getReplacementRate() Returns the replacement rate
int	getSelectionRate() Returns the selection rate
Selector<T>	getSelector() Returns the selector
protected void	preselect(Population<T> in, Population<T> out) Preselection of individuals before processing.
protected void	replace(Population<T> initial, Population<T> preselected, Population<T> evolved, Population<T> out) Implements the replacement policy.
void	setBiggerIsBetter(boolean flag, boolean recursively) Deprecated.
void	setReplacementPolicy(SteadyState.ReplacementStrategy replacement) Sets the replacement policy
void	setReplacementRate(int rate) Sets the replacement rate
void	setSelectionRate(int sr) Sets the selection rate
void	setSelector(Selector<T> selector) Sets the selector

Methods inherited from class jenes.stage.operator.Crowder

getBody, init, isElitist, process, setElitist, setFitness, similarity

Methods inherited from class jenes.stage.operator.Operator

getStatistics, updateStatistics

Methods inherited from class jenes.stage.AbstractStage

dispose, getFitness, isBiggerBetter, isFitnessChanged, setBiggerIsBetter, setFitness

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_REPLACEMENT_STRATEGY

public static final SteadyState.ReplacementStrategy DEFAULT_REPLACEMENT_STRATEGY

Default replace strategy

DEFAULT_SELECTION_RATE

public static final int DEFAULT_SELECTION_RATE

Defualt selection rate

See Also:

Constant Field Values

DEFAULT_REPLACEMENT_RATE

public static final int DEFAULT_REPLACEMENT_RATE

Default replacement rate

See Also:

Constant Field Values

selector

protected Selector<T extends Chromosome> selector

Selector

replacementStrategy

protected SteadyState.ReplacementStrategy replacementStrategy

Replacement strategy

replacementRate

protected int replacementRate

Replacement rate

Constructor Detail

SteadyState

public SteadyState(Selector<T> selector,
           AbstractStage<T>... stages)

Creates a SteadySate instance

Parameters:

selector - selector

stages - body stages

SteadyState

public SteadyState(int rr,
           int sr,
           Selector<T> selector,
           AbstractStage<T>... stages)

Creates a SteadyState instance

Parameters:

rr - replacement rate

sr - selection rate

selector - selector

stages - body statges

Method Detail

getSelector

public final Selector<T> getSelector()

Returns the selector

Returns:

setSelector

public void setSelector(Selector<T> selector)

Sets the selector

Parameters:

selector -

getSelectionRate

public final int getSelectionRate()

Returns the selection rate

Returns:

setSelectionRate

public void setSelectionRate(int sr)

Sets the selection rate

Parameters:

sr - rate

getReplacementPolicy

public final SteadyState.ReplacementStrategy getReplacementPolicy()

Returns the replacement policy

Returns:

setReplacementPolicy

public void setReplacementPolicy(SteadyState.ReplacementStrategy replacement)

Sets the replacement policy

Parameters:

replacement -

getReplacementRate

public final int getReplacementRate()

Returns the replacement rate

Returns:

setReplacementRate

public void setReplacementRate(int rate)

Sets the replacement rate

Parameters:

rate -

preselect

protected void preselect(Population<T> in,
             Population<T> out)

Description copied from class: Crowder

Preselection of individuals before processing.

Specified by:

preselect in class Crowder<T extends Chromosome>

Parameters:

in - input population

out - output population

replace

protected void replace(Population<T> initial,
           Population<T> preselected,
           Population<T> evolved,
           Population<T> out)

Description copied from class: Crowder

Implements the replacement policy.

Specified by:

replace in class Crowder<T extends Chromosome>

Parameters:

initial - - the initial population

preselected - - the population resulting from preselection

evolved - - the part of population that has evolved

out - - the output population

setBiggerIsBetter

@Deprecated
public void setBiggerIsBetter(boolean flag,
                                boolean recursively)

Deprecated.

Overrides:

setBiggerIsBetter in class Crowder<T extends Chromosome>

Parameters:

flag - true, if the best individual has the higher fitness

recursively - true, to propagate this setting down, otherwise false.