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/* |
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* |
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* Copyright (C) 2009-2017 Julian Mendez |
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* |
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* |
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* This file is part of jcel. |
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* |
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* |
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* The contents of this file are subject to the GNU Lesser General Public License |
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* version 3 |
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* |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* Alternatively, the contents of this file may be used under the terms |
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* of the Apache License, Version 2.0, in which case the |
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* provisions of the Apache License, Version 2.0 are applicable instead of those |
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* above. |
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* |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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package de.tudresden.inf.lat.jcel.ontology.normalization; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.Objects; |
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import java.util.Set; |
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import de.tudresden.inf.lat.jcel.coreontology.axiom.NormalizedIntegerAxiom; |
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import de.tudresden.inf.lat.jcel.coreontology.axiom.NormalizedIntegerAxiomFactory; |
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import de.tudresden.inf.lat.jcel.coreontology.datatype.IntegerAxiom; |
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import de.tudresden.inf.lat.jcel.coreontology.datatype.IntegerEntityManager; |
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import de.tudresden.inf.lat.jcel.ontology.axiom.complex.IntegerSubClassOfAxiom; |
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import de.tudresden.inf.lat.jcel.ontology.axiom.extension.IntegerOntologyObjectFactory; |
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import de.tudresden.inf.lat.jcel.ontology.datatype.IntegerClass; |
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import de.tudresden.inf.lat.jcel.ontology.datatype.IntegerClassExpression; |
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import de.tudresden.inf.lat.jcel.ontology.datatype.IntegerObjectIntersectionOf; |
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import de.tudresden.inf.lat.jcel.ontology.datatype.IntegerObjectPropertyExpression; |
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import de.tudresden.inf.lat.jcel.ontology.datatype.IntegerObjectSomeValuesFrom; |
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/** |
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* |
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* @author Julian Mendez |
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*/ |
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public class NormalizerSubClassOf implements NormalizationRule { |
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private final IntegerOntologyObjectFactory ontologyObjectFactory; |
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public NormalizerSubClassOf(IntegerOntologyObjectFactory factory) { |
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this.ontologyObjectFactory = factory; |
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} |
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@Override |
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public Set<IntegerAxiom> apply(IntegerAxiom axiom) { |
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Objects.requireNonNull(axiom); |
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Set<IntegerAxiom> ret = new HashSet<>(); |
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if (axiom instanceof IntegerSubClassOfAxiom) { |
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Collection<NormalizedIntegerAxiom> normalizedAxioms = simplify((IntegerSubClassOfAxiom) axiom); |
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normalizedAxioms.forEach(normalizedAxiom -> { |
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ret.add(normalizedAxiom); |
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}); |
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} |
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return ret; |
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} |
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private IntegerEntityManager getIdGenerator() { |
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return getOntologyObjectFactory().getEntityManager(); |
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} |
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private NormalizedIntegerAxiomFactory getNormalizedAxiomFactory() { |
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return getOntologyObjectFactory().getNormalizedAxiomFactory(); |
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} |
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private Integer getObjectPropertyId(IntegerObjectPropertyExpression propExpr) { |
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return propExpr.accept(new ObjectPropertyIdFinder(getIdGenerator())); |
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} |
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public IntegerOntologyObjectFactory getOntologyObjectFactory() { |
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return this.ontologyObjectFactory; |
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} |
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private Collection<NormalizedIntegerAxiom> simplify(IntegerSubClassOfAxiom axiom) { |
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Collection<NormalizedIntegerAxiom> ret = new ArrayList<>(); |
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IntegerClassExpression subClass = axiom.getSubClass(); |
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IntegerClassExpression superClass = axiom.getSuperClass(); |
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if (subClass.isLiteral() && superClass.isLiteral()) { |
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ret.add(getNormalizedAxiomFactory().createGCI0Axiom(((IntegerClass) subClass).getId(), |
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((IntegerClass) superClass).getId(), axiom.getAnnotations())); |
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} else if (!subClass.isLiteral() && superClass.isLiteral() && (subClass instanceof IntegerObjectIntersectionOf) |
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&& subClass.hasOnlyClasses()) { |
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IntegerObjectIntersectionOf intersection = (IntegerObjectIntersectionOf) subClass; |
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Set<IntegerClassExpression> operands = intersection.getOperands(); |
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if (operands.size() == 0) { |
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ret.add(getNormalizedAxiomFactory().createGCI0Axiom(IntegerEntityManager.topClassId, |
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((IntegerClass) superClass).getId(), axiom.getAnnotations())); |
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} else if (operands.size() == 1) { |
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ret.add(getNormalizedAxiomFactory().createGCI0Axiom(((IntegerClass) operands.iterator().next()).getId(), |
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((IntegerClass) superClass).getId(), axiom.getAnnotations())); |
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} else if (operands.size() == 2) { |
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Iterator<IntegerClassExpression> it = operands.iterator(); |
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int leftSubClassId = ((IntegerClass) it.next()).getId(); |
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int rightSubClassId = ((IntegerClass) it.next()).getId(); |
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int superClassId = ((IntegerClass) superClass).getId(); |
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ret.add(getNormalizedAxiomFactory().createGCI1Axiom(leftSubClassId, rightSubClassId, superClassId, |
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axiom.getAnnotations())); |
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} |
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} else if (subClass.isLiteral() && !superClass.isLiteral() |
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&& (superClass instanceof IntegerObjectSomeValuesFrom) && superClass.hasOnlyClasses()) { |
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IntegerObjectSomeValuesFrom restriction = (IntegerObjectSomeValuesFrom) superClass; |
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IntegerClass filler = (IntegerClass) restriction.getFiller(); |
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Integer property = getObjectPropertyId(restriction.getProperty()); |
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ret.add(getNormalizedAxiomFactory().createGCI2Axiom(((IntegerClass) subClass).getId(), property, |
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filler.getId(), axiom.getAnnotations())); |
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} else if (!subClass.isLiteral() && superClass.isLiteral() && (subClass instanceof IntegerObjectSomeValuesFrom) |
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&& subClass.hasOnlyClasses()) { |
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IntegerObjectSomeValuesFrom restriction = (IntegerObjectSomeValuesFrom) subClass; |
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IntegerClass filler = (IntegerClass) restriction.getFiller(); |
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Integer property = getObjectPropertyId(restriction.getProperty()); |
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ret.add(getNormalizedAxiomFactory().createGCI3Axiom(property, filler.getId(), |
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((IntegerClass) superClass).getId(), axiom.getAnnotations())); |
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} |
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return ret; |
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} |
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} |
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julianmendez /
jcel
