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.algorithms.ocel;
020
021import java.util.Comparator;
022
023import org.dllearner.core.AbstractReasonerComponent;
024import org.semanticweb.owlapi.model.OWLClassExpression;
025
026public class SubsumptionComparator implements Comparator<OWLClassExpression> {
027
028        private AbstractReasonerComponent rs;
029        
030        public SubsumptionComparator(AbstractReasonerComponent rs) {
031                this.rs = rs;
032        }
033        
034        public int compare(ExampleBasedNode arg0, ExampleBasedNode arg1) {
035                OWLClassExpression concept1 = arg0.getConcept();
036                OWLClassExpression concept2 = arg1.getConcept();
037                return compare(concept1, concept2);
038        }
039
040        @Override
041        public int compare(OWLClassExpression concept1, OWLClassExpression concept2) {
042                // return true if concept1 is a super concept of concept2
043                boolean value1 = rs.isSuperClassOf(concept1, concept2);
044                if(value1)
045                        return 1;
046                
047                boolean value2 = rs.isSuperClassOf(concept2, concept1);
048                if(value2)
049                        return -1;
050                
051//              System.out.println("Incomparable: " + concept1 + " " + concept2);
052                
053                // both concepts are incomparable => order them syntactically
054                return concept1.compareTo(concept2);
055        }
056
057}