net.sourceforge.cilib.pso.dynamic.responsestrategies
Class DualReactionStrategy<E extends PopulationBasedAlgorithm>

java.lang.Object
  net.sourceforge.cilib.pso.dynamic.responsestrategies.EnvironmentChangeResponseStrategy<E>
      net.sourceforge.cilib.pso.dynamic.responsestrategies.DualReactionStrategy<E>

Type Parameters:

E - some population based algorithm

All Implemented Interfaces:

Serializable, Cloneable

public class DualReactionStrategy<E extends PopulationBasedAlgorithm>
extends EnvironmentChangeResponseStrategy<E>

This reaction strategy wraps both a ReinitializationReactionStrategy and a ReevaluationReactionStrategy. It firstly performs the specified number of reinitializations on randomly chosen entities in the Topology. Then it performs the specified number of reevaluations on randomly chosen entities from those that remain.

Author:

Theuns Cloete

See Also:

Serialized Form

Field Summary

protected Random	randomGenerator
protected ReevaluationReactionStrategy<E>	reevaluation
protected ReinitializationReactionStrategy<E>	reinitialization

Fields inherited from class net.sourceforge.cilib.pso.dynamic.responsestrategies.EnvironmentChangeResponseStrategy

hasMemory

Constructor Summary

DualReactionStrategy()

DualReactionStrategy(DualReactionStrategy<E> rhs)

Method Summary

DualReactionStrategy<E>	getClone() Clone the EnvironmentChangeResponseStrategy object.
Random	getRandomGenerator() Retrieve the random number generator being used.
double	getReevaluationRatio() Get the ratio of entities that should be reevaluated.
double	getReinitializationRatio() Get the ratio of entities that should be reinitialized.
void	performReaction(E algorithm) Respond by firstly reinitializing a specified number of entities and then reevaluating another specified number of entities.
void	setRandomGenerator(Random r) Set the random number generator to use.
void	setReevaluationRatio(double rer) Set the ratio of entities that should be reevaluated.
void	setReinitializationRatio(double rr) Set the ratio of entities that should be reinitialized.

Methods inherited from class net.sourceforge.cilib.pso.dynamic.responsestrategies.EnvironmentChangeResponseStrategy

getHasMemory, respond, setHasMemory, updateNeighbourhoodBestEntities

Methods inherited from class java.lang.Object

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

Field Detail

reevaluation

protected ReevaluationReactionStrategy<E extends PopulationBasedAlgorithm> reevaluation

reinitialization

protected ReinitializationReactionStrategy<E extends PopulationBasedAlgorithm> reinitialization

randomGenerator

protected Random randomGenerator

Constructor Detail

DualReactionStrategy

public DualReactionStrategy()

DualReactionStrategy

public DualReactionStrategy(DualReactionStrategy<E> rhs)

Method Detail

getClone

public DualReactionStrategy<E> getClone()

Description copied from class: EnvironmentChangeResponseStrategy

Clone the EnvironmentChangeResponseStrategy object.

Specified by:

getClone in interface Cloneable

Specified by:

getClone in class EnvironmentChangeResponseStrategy<E extends PopulationBasedAlgorithm>

Returns:

A cloned EnvironmentChangeResponseStrategy

See Also:

Object.clone()

performReaction

public void performReaction(E algorithm)

Respond by firstly reinitializing a specified number of entities and then reevaluating another specified number of entities. This is the method responsible for responding that should be overridden by sub-classes.

Specified by:

performReaction in class EnvironmentChangeResponseStrategy<E extends PopulationBasedAlgorithm>

setReinitializationRatio

public void setReinitializationRatio(double rr)

Set the ratio of entities that should be reinitialized. This is defered to the wrapped ReinitializationReactionStrategy.

Parameters:

rr - a double value in the range (0.0, 1.0)

getReinitializationRatio

public double getReinitializationRatio()

Get the ratio of entities that should be reinitialized. This is defered to the wrapped ReinitializationReactionStrategy.

Returns:

the ratio of entities that should be reinitialized

setReevaluationRatio

public void setReevaluationRatio(double rer)

Set the ratio of entities that should be reevaluated. This is defered to the wrapped ReevaluationReactionStrategy.

Parameters:

rer - a double value in the range (0.0, 1.0)

getReevaluationRatio

public double getReevaluationRatio()

Get the ratio of entities that should be reevaluated. This is defered to the wrapped ReevaluationReactionStrategy.

Returns:

the ratio of entities that should be reevaluated

setRandomGenerator

public void setRandomGenerator(Random r)

Set the random number generator to use. Also make sure that the wrapped reaction strategies (reevaluation and reinitialization) use the same generator, so that the random numbers that are retrieved are in the same sequence.

Parameters:

r - a Random object

getRandomGenerator

public Random getRandomGenerator()

Retrieve the random number generator being used.

Returns:

the Random object being used to generate a random sequence of numbers