001/** 002 * Copyright (C) 2007-2013, 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.isle.wsd; 020 021import java.util.Random; 022import java.util.Set; 023 024import org.dllearner.algorithms.isle.index.Annotation; 025import org.dllearner.algorithms.isle.index.EntityScorePair; 026import org.dllearner.algorithms.isle.index.SemanticAnnotation; 027import org.semanticweb.owlapi.model.OWLEntity; 028import org.semanticweb.owlapi.model.OWLOntology; 029 030/** 031 * Disambiguation by randomly selecting one of the candidates (baseline method). 032 * 033 * @author Jens Lehmann 034 * 035 */ 036public class RandomWordSenseDisambiguation extends WordSenseDisambiguation { 037 038 private Random random; 039 040 public RandomWordSenseDisambiguation(OWLOntology ontology) { 041 super(ontology); 042 random = new Random(); 043 } 044 045 @Override 046 public SemanticAnnotation disambiguate(Annotation annotation, 047 Set<EntityScorePair> candidateEntities) { 048 int pos = random.nextInt(candidateEntities.size()); 049 int i = 0; 050 for(EntityScorePair esp : candidateEntities) { 051 OWLEntity e = esp.getEntity(); 052 if (i == pos) { 053 return new SemanticAnnotation(annotation, e); 054 } 055 i++; 056 } 057 return null; 058 } 059 060}