001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.search.lucene;
016    
017    import org.apache.lucene.search.spell.StringDistance;
018    import org.apache.lucene.search.spell.SuggestWord;
019    
020    /**
021     * @author Michael C. Han
022     */
023    public class StringDistanceRelevancyChecker implements RelevancyChecker {
024    
025            public StringDistanceRelevancyChecker(
026                    String word, float scoresThreshold, StringDistance stringDistance) {
027    
028                    _word = word;
029                    _scoresThreshold = scoresThreshold;
030                    _stringDistance = stringDistance;
031            }
032    
033            @Override
034            public boolean isRelevant(SuggestWord suggestWord) {
035                    String word = suggestWord.string;
036    
037                    if (word.equals(_word)) {
038                            return false;
039                    }
040    
041                    suggestWord.score = _stringDistance.getDistance(
042                            _word, suggestWord.string);
043    
044                    if (suggestWord.score <= _scoresThreshold) {
045                            return false;
046                    }
047    
048                    return true;
049            }
050    
051            private float _scoresThreshold;
052            private StringDistance _stringDistance;
053            private String _word;
054    
055    }