org.opt4j.core.common.archive
Class AbstractArchive

java.lang.Object
  org.opt4j.core.IndividualSet
      org.opt4j.core.optimizer.Archive
          org.opt4j.core.common.archive.AbstractArchive

All Implemented Interfaces:

java.lang.Iterable<Individual>, java.util.Collection<Individual>, java.util.Set<Individual>

Direct Known Subclasses:

BoundedArchive, PopulationArchive, UnboundedArchive

public abstract class AbstractArchive
extends Archive

This AbstractArchive provides some common methods for Archive s. If one or more new Individuals are added to this Archive, it is ensured that all Individuals in this Archive are not Pareto-dominated. Actual implementations of this class may still refuse or drop some Individuals. An Archive can be a BoundedArchive if it has a bounded size or an UnboundedArchive, otherwise.

Field Summary

Fields inherited from class org.opt4j.core.IndividualSet

individuals, listeners

Constructor Summary

AbstractArchive()

Method Summary

boolean	update(java.util.Set<? extends Individual> individuals) Updates the archive with a set of individuals.
protected abstract boolean	updateWithNondominated(java.util.Collection<Individual> candidates) Adds new candidates which are already checked to be not Pareto-dominated by any other individual in this Archive.

Methods inherited from class org.opt4j.core.optimizer.Archive

addCheckedIndividual, addCheckedIndividuals, update

Methods inherited from class org.opt4j.core.IndividualSet

add, addAll, addAll, addListener, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, removeListener, retainAll, size, toArray, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

equals, hashCode

Constructor Detail

AbstractArchive

public AbstractArchive()

Method Detail

update

public boolean update(java.util.Set<? extends Individual> individuals)

Description copied from class: Archive

Updates the archive with a set of individuals. Instead of the add /addAll methods, which are prohibited for the archive (throwing an UnsupportedOperationException), this method shall be used.

Specified by:

update in class Archive

Parameters:

individuals - the set of individuals that is used to update the archive

Returns:

returns true if the content of the archive changed

updateWithNondominated

protected abstract boolean updateWithNondominated(java.util.Collection<Individual> candidates)

Adds new candidates which are already checked to be not Pareto-dominated by any other individual in this Archive. All Individuals in the Archive which were dominated by the candidates have already been removed.

Parameters:

candidates - the non-dominated individuals which can be added

Returns:

true if one or more candidates are added to the archive