ai.libs.jaicore.ea.algorithm.moea.moeaframework

Class AbstractEvolutionaryAlgorithm

java.lang.Object

ai.libs.jaicore.ea.algorithm.moea.moeaframework.AbstractAlgorithm

ai.libs.jaicore.ea.algorithm.moea.moeaframework.AbstractEvolutionaryAlgorithm

All Implemented Interfaces:

org.moeaframework.core.Algorithm, org.moeaframework.core.EvolutionaryAlgorithm

Direct Known Subclasses:

NSGAII

public abstract class AbstractEvolutionaryAlgorithm
extends AbstractAlgorithm
implements org.moeaframework.core.EvolutionaryAlgorithm

Abstract class providing default implementations for several EvolutionaryAlgorithm methods. Primarily, the initialize() method generates and evaluates the initial population, adding the solutions to the archive if available. The getResult() method returns the non-dominated solutions from the population and, if available, the archive. The majority of evolutionary algorithms should only need to override the AbstractAlgorithm.iterate() method.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.moeaframework.core.NondominatedPopulation	archive The archive storing the non-dominated solutions.
protected org.moeaframework.core.Initialization	initialization The initialization operator.
protected org.moeaframework.core.Population	population The current population.

Fields inherited from class ai.libs.jaicore.ea.algorithm.moea.moeaframework.AbstractAlgorithm

initialized, numberOfEvaluations, problem, terminated

Constructor Summary

Constructors

Constructor and Description
AbstractEvolutionaryAlgorithm(org.moeaframework.core.Problem problem, org.moeaframework.core.Population population, org.moeaframework.core.NondominatedPopulation archive, org.moeaframework.core.Initialization initialization) Constructs an abstract evolutionary algorithm.

Method Summary

Modifier and Type	Method and Description
org.moeaframework.core.NondominatedPopulation	getArchive()
org.moeaframework.core.Population	getPopulation()
org.moeaframework.core.NondominatedPopulation	getResult()
java.io.Serializable	getState()
protected void	initialize() Performs any initialization that is required by this algorithm.
void	setState(java.lang.Object objState)

Methods inherited from class ai.libs.jaicore.ea.algorithm.moea.moeaframework.AbstractAlgorithm

evaluate, evaluateAll, evaluateAll, finalize, getNumberOfEvaluations, getProblem, isInitialized, isTerminated, iterate, step, terminate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.moeaframework.core.Algorithm

evaluate, getNumberOfEvaluations, getProblem, isTerminated, step, terminate

Field Detail

population

protected final org.moeaframework.core.Population population

The current population.

archive

protected final org.moeaframework.core.NondominatedPopulation archive

The archive storing the non-dominated solutions.

initialization

protected final org.moeaframework.core.Initialization initialization

The initialization operator.

Constructor Detail

AbstractEvolutionaryAlgorithm

public AbstractEvolutionaryAlgorithm(org.moeaframework.core.Problem problem,
                                     org.moeaframework.core.Population population,
                                     org.moeaframework.core.NondominatedPopulation archive,
                                     org.moeaframework.core.Initialization initialization)

Constructs an abstract evolutionary algorithm.

Parameters:

problem - the problem being solved

population - the population

archive - the archive storing the non-dominated solutions

initialization - the initialization operator

Method Detail

getResult

public org.moeaframework.core.NondominatedPopulation getResult()

Specified by:

getResult in interface org.moeaframework.core.Algorithm

initialize

protected void initialize()

Description copied from class: AbstractAlgorithm

Performs any initialization that is required by this algorithm. This method is called automatically by the first invocation of AbstractAlgorithm.step(), but may also be called manually prior to any invocations of step. Implementations should always invoke super.initialize() to ensure the hierarchy is initialized correctly.

Overrides:

initialize in class AbstractAlgorithm

getArchive

public org.moeaframework.core.NondominatedPopulation getArchive()

Specified by:

getArchive in interface org.moeaframework.core.EvolutionaryAlgorithm

getPopulation

public org.moeaframework.core.Population getPopulation()

Specified by:

getPopulation in interface org.moeaframework.core.EvolutionaryAlgorithm

getState

public java.io.Serializable getState()
                              throws java.io.NotSerializableException

Specified by:

getState in interface org.moeaframework.core.Algorithm

Overrides:

getState in class AbstractAlgorithm

Throws:

java.io.NotSerializableException

setState

public void setState(java.lang.Object objState)
              throws java.io.NotSerializableException

Specified by:

setState in interface org.moeaframework.core.Algorithm

Overrides:

setState in class AbstractAlgorithm

Throws:

java.io.NotSerializableException