org.semanticweb.owlapi.modularity.locality

Class LocalityModuleExtractor

java.lang.Object

org.semanticweb.owlapi.modularity.locality.LocalityModuleExtractor

All Implemented Interfaces:

ModuleExtractor

Direct Known Subclasses:

SemanticLocalityModuleExtractor, SyntacticLocalityModuleExtractor

public abstract class LocalityModuleExtractor
extends Object
implements ModuleExtractor

Abstract class for convenience implementation of locality-based ModuleExtractors. Offers protected methods for the improved algorithm for module extraction.

Author:

Marc Robin Nolte

Method Summary

Modifier and Type	Method and Description
Stream<OWLAxiom>	axiomBase() Return the axioms all modules of this ModuleExtractor are computed against, including global axioms and tautologies.
boolean	containsAxiom(OWLAxiom axiom) Returns whether or not the axiom base of this ModuleExtractor contains the given OWLAxiom.
Stream<OWLAxiom>	extract(Stream<OWLEntity> signature, Optional<Predicate<OWLAxiom>> axiomFilter) Extracts a module with respect to the given signature against the subset of the axiom base this ModuleExtractors axiom base that matches the given Predicate, if any.
LocalityClass	getLocalityClass() Returns the locality class used by this LocalityModuleExtractor.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.semanticweb.owlapi.modularity.ModuleExtractor

everyModuleContains, extract, extract, extractAsOntology, globals, noModuleContains, tautologies

Method Detail

axiomBase

@Nonnull
public final Stream<OWLAxiom> axiomBase()

Description copied from interface: ModuleExtractor

Return the axioms all modules of this ModuleExtractor are computed against, including global axioms and tautologies.

Specified by:

axiomBase in interface ModuleExtractor

Returns:

The axioms as specified above

containsAxiom

public boolean containsAxiom(OWLAxiom axiom)

Description copied from interface: ModuleExtractor

Returns whether or not the axiom base of this ModuleExtractor contains the given OWLAxiom.

Specified by:

containsAxiom in interface ModuleExtractor

Parameters:

axiom - The axiom to test

Returns:

A boolean value as specified above

extract

public final Stream<OWLAxiom> extract(Stream<OWLEntity> signature,
                                      Optional<Predicate<OWLAxiom>> axiomFilter)

Description copied from interface: ModuleExtractor

Extracts a module with respect to the given signature against the subset of the axiom base this ModuleExtractors axiom base that matches the given Predicate, if any.

Specified by:

extract in interface ModuleExtractor

Parameters:

signature - The signature the module should be extracted against.

axiomFilter - An Optional Predicate that filters a subset of the axiom base to extract the module against. Note that ignoring some axiom may lead to other axioms not be contained in the module either. For example, consider the Ontology O:= {A⊑B, B⊑C, C⊑D} and the signature {A}. SyntacticLocalityEvaluator with LocalityClass.BOTTOM returns O as a whole, but when ignoring the axiom B⊑C it only returns {A⊑B}.

Returns:

The axioms of the module with respect to the given signature

getLocalityClass

@Nonnull
public LocalityClass getLocalityClass()

Returns the locality class used by this LocalityModuleExtractor.

Returns:

The locality class used by this LocalityModuleExtractor