org.dllearner.refinementoperators
Class PsiUp

java.lang.Object
  org.dllearner.refinementoperators.RefinementOperatorAdapter
      org.dllearner.refinementoperators.PsiUp

All Implemented Interfaces:

RefinementOperator

public class PsiUp
extends RefinementOperatorAdapter

Constructor Summary

PsiUp(PosNegLP learningProblem, AbstractReasonerComponent reasoningService)

Method Summary

Set<Description>	refine(Description concept) Standard refinement operation.
Set<Description>	refine(Description concept, int maxLength, List<Description> knownRefinements) Optional refinement operation, where the learning algorithm can specify an additional bound on the length of descriptions and a list of known refinements, which do not need to be returned.

Methods inherited from class org.dllearner.refinementoperators.RefinementOperatorAdapter

refine

Methods inherited from class java.lang.Object

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

Constructor Detail

PsiUp

public PsiUp(PosNegLP learningProblem,
             AbstractReasonerComponent reasoningService)

Method Detail

refine

public Set<Description> refine(Description concept)

Description copied from interface: RefinementOperator

Standard refinement operation.

Specified by:

refine in interface RefinementOperator

Specified by:

refine in class RefinementOperatorAdapter

Parameters:

concept - The description, which will be refined.

Returns:

A set of refinements.

refine

public Set<Description> refine(Description concept,
                               int maxLength,
                               List<Description> knownRefinements)

Description copied from interface: RefinementOperator

Optional refinement operation, where the learning algorithm can specify an additional bound on the length of descriptions and a list of known refinements, which do not need to be returned.

Specified by:

refine in interface RefinementOperator

Overrides:

refine in class RefinementOperatorAdapter

Parameters:

concept - The description, which will be refined.

maxLength - The maximum length of returned description, where length is defined by KBElement.getLength().

knownRefinements - A collection of known refinements, which do not need to be returned.

Returns:

A set of refinements obeying the above restrictions.