org.coode.owlapi.rdfxml.parser.TPSubClassOfHandler Maven / Gradle / Ivy

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/*
 * This file is part of the OWL API.
 *
 * The contents of this file are subject to the LGPL License, Version 3.0.
 *
 * Copyright (C) 2011, The University of Manchester
 *
 * 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
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 *
 * 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.
 *
 * Copyright 2011, University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.coode.owlapi.rdfxml.parser;

import java.util.Set;

import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLAnnotation;
import org.semanticweb.owlapi.model.OWLAxiom;
import org.semanticweb.owlapi.model.OWLClassExpression;
import org.semanticweb.owlapi.model.UnloadableImportException;
import org.semanticweb.owlapi.vocab.OWLRDFVocabulary;

/**
 * Handles rdfs:subClassOf triples. If handling is set to strict then the triple
 * is only consumed if the subject and object are typed as classes.
 * 
 * @author Matthew Horridge, The University Of Manchester, Bio-Health
 *         Informatics Group, Date: 08-Dec-2006
 */
public class TPSubClassOfHandler extends TriplePredicateHandler {

    /**
     * @param consumer
     *        consumer
     */
    public TPSubClassOfHandler(OWLRDFConsumer consumer) {
        super(consumer, OWLRDFVocabulary.RDFS_SUBCLASS_OF.getIRI());
    }

    @Override
    public boolean canHandle(IRI subject, IRI predicate, IRI object) {
        return super.canHandle(subject, predicate, object)
                && isTyped(subject, predicate, object);
    }

    @SuppressWarnings("unused")
    private boolean isTyped(IRI subject, IRI predicate, IRI object) {
        return getConsumer().isClassExpression(subject)
                && getConsumer().isClassExpression(object);
    }

    @Override
    public boolean canHandleStreaming(IRI subject, IRI predicate, IRI object) {
        getConsumer().addClassExpression(subject, false);
        getConsumer().addClassExpression(object, false);
        return !isStrict() && !isSubjectOrObjectAnonymous(subject, object);
    }

    @Override
    public void handleTriple(IRI subject, IRI predicate, IRI object)
            throws UnloadableImportException {
        if (isStrict()) {
            if (isClassExpressionStrict(subject)
                    && isClassExpressionStrict(object)) {
                translate(subject, predicate, object);
            }
        } else {
            if (isClassExpressionLax(subject) && isClassExpressionLax(object)) {
                translate(subject, predicate, object);
            }
        }
    }

    private void translate(IRI subject, IRI predicate, IRI object) {
        OWLClassExpression subClass = translateClassExpression(subject);
        OWLClassExpression supClass = translateClassExpression(object);
        Set pendingAnnotations = getConsumer()
                .getPendingAnnotations();
        OWLAxiom ax = getDataFactory().getOWLSubClassOfAxiom(subClass,
                supClass, pendingAnnotations);
        addAxiom(ax);
        consumeTriple(subject, predicate, object);
    }
}