org.semanticweb.owlapi.AmalgamateSubClassAxioms Maven / Gradle / Ivy
/*
* This file is part of the OWL API.
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* The contents of this file are subject to the LGPL License, Version 3.0.
*
* Copyright (C) 2011, The University of Manchester
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* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
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* This program is distributed in the hope that it will be useful,
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* Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0
* in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
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* Copyright 2011, The University of Manchester
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
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package org.semanticweb.owlapi;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.semanticweb.owlapi.model.AddAxiom;
import org.semanticweb.owlapi.model.OWLClass;
import org.semanticweb.owlapi.model.OWLClassExpression;
import org.semanticweb.owlapi.model.OWLDataFactory;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyChange;
import org.semanticweb.owlapi.model.OWLSubClassOfAxiom;
import org.semanticweb.owlapi.model.RemoveAxiom;
/**
* Author: Matthew Horridge
* The University Of Manchester
* Bio-Health Informatics Group
* Date: 15-Aug-2007
*
* Given a set of ontologies S, for each ontology, O, in S, this change
* combines multiple subclass axioms with a common left hand side into
* one subclass axiom. For example, given A subClassOf B, A subClassOf C,
* this change will remove these two axioms and replace them by adding
* one subclass axiom, A subClassOf (B and C).
*/
public class AmalgamateSubClassAxioms extends AbstractCompositeOntologyChange {
private final List changes;
/**
* @param ontologies the ontologies to use
* @param dataFactory the data factory
*/
public AmalgamateSubClassAxioms(Set ontologies, OWLDataFactory dataFactory) {
super(dataFactory);
changes = new ArrayList();
for (OWLOntology ont : ontologies) {
for (OWLClass cls : ont.getClassesInSignature()) {
Set axioms = ont.getSubClassAxiomsForSubClass(cls);
if (axioms.size() > 1) {
Set superClasses = new HashSet();
for (OWLSubClassOfAxiom ax : axioms) {
changes.add(new RemoveAxiom(ont, ax));
superClasses.add(ax.getSuperClass());
}
OWLClassExpression combinedSuperClass = getDataFactory().getOWLObjectIntersectionOf(superClasses);
changes.add(new AddAxiom(ont, getDataFactory().getOWLSubClassOfAxiom(cls, combinedSuperClass)));
}
}
}
}
@Override
public List getChanges() {
return changes;
}
}