001/**
002 * Copyright (C) 2007 - 2016, Jens Lehmann
003 *
004 * This file is part of DL-Learner.
005 *
006 * DL-Learner is free software; you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation; either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * DL-Learner is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package org.dllearner.utilities.owl;
020
021import org.semanticweb.owlapi.io.OWLObjectRenderer;
022import org.semanticweb.owlapi.model.*;
023
024import javax.annotation.Nonnull;
025import java.util.Iterator;
026
027import static org.semanticweb.owlapi.dlsyntax.renderer.DLSyntax.*;
028
029/**
030 * Extended version of the DLSyntaxObjectRenderer class in OWL API. Extension is
031 * done for data range facets, e.g. double[<=1.5].
032 * 
033 * Renders objects in unicode DL syntax.
034 * 
035 * @author Lorenz Buehmann
036 */
037public class DLSyntaxObjectRendererExt extends org.semanticweb.owlapi.dlsyntax.renderer.DLSyntaxObjectRenderer
038implements OWLObjectRenderer, OWLObjectVisitor {
039        ///////////////////////////////////////////////////////////////////////////////////////////////
040        //
041        // Data stuff
042        //
043        ///////////////////////////////////////////////////////////////////////////////////////////////
044
045        @Override
046        public void visit(@Nonnull OWLDataIntersectionOf node) {
047                write("(");
048                write(node.getOperands(), AND, false);
049                write(")");
050        }
051
052        @Override
053        public void visit(@Nonnull OWLDataUnionOf node) {
054                write("(");
055                write(node.getOperands(), OR, false);
056                write(")");
057        }
058
059        @Override
060        public void visit(@Nonnull OWLDatatypeRestriction node) {
061                node.getDatatype().accept(this);
062                write("[");
063                Iterator<OWLFacetRestriction> iterator = node.getFacetRestrictions().iterator();
064
065                while(iterator.hasNext()) {
066                        OWLFacetRestriction facetRestriction = iterator.next();
067                        facetRestriction.accept(this);
068                        if(iterator.hasNext()) {
069                                write(" " + COMMA + " ");
070                        }
071                }
072                write("]");
073        }
074
075        @Override
076        public void visit(OWLObjectHasSelf ce) {
077                write(EXISTS);
078                writeSpace();
079                ce.getProperty().accept(this);
080                write(".");
081                write(SELF);
082        }
083
084        @Override
085        public void visit(@Nonnull OWLFacetRestriction node) {
086                switch (node.getFacet()) {
087                        case MIN_INCLUSIVE: write("\u2265"); /* >= */ break;
088                        case MIN_EXCLUSIVE: write("\u003e"); /* >  */ break;
089                        case MAX_INCLUSIVE: write("\u2264"); /* <= */ break;
090                        case MAX_EXCLUSIVE: write("\u003c"); /* <  */ break;
091                        default:
092                                write(node.getFacet().getSymbolicForm());
093                }
094                writeSpace();
095                node.getFacetValue().accept(this);
096        }
097
098        /* private :-( */
099        protected void writeSpace() {
100                write(" ");
101        }
102}