001    /**
002     * Copyright (C) 2007-2011, 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     */
019    
020    package org.dllearner.utilities.owl;
021    
022    import java.util.Comparator;
023    
024    import org.dllearner.core.EvaluatedDescription;
025    
026    /**
027     * Comparator for evaluated descriptions, which orders them by
028     * accuracy as first criterion, length as second criterion, and
029     * syntactic structure as third criterion.
030     * 
031     * @author Jens Lehmann
032     *
033     */
034    public class EvaluatedDescriptionComparator implements Comparator<EvaluatedDescription> {
035    
036            ConceptComparator cc = new ConceptComparator();
037            
038            /* (non-Javadoc)
039             * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
040             */
041            @Override
042            public int compare(EvaluatedDescription ed1, EvaluatedDescription ed2) {
043                    double acc1 = ed1.getAccuracy();
044                    double acc2 = ed2.getAccuracy();
045                    if(acc1 > acc2)
046                            return 1;
047                    else if(acc1 < acc2)
048                            return -1;
049                    else {
050                            int length1 = ed1.getDescriptionLength();
051                            int length2 = ed2.getDescriptionLength();
052                            if(length1 < length2)
053                                    return 1;
054                            else if(length1 > length2)
055                                    return -1;
056                            else
057                                    return cc.compare(ed1.getDescription(), ed2.getDescription());
058                    }
059            }
060    
061    }