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.kernel.search;
016    
017    import com.liferay.portal.kernel.util.ArrayUtil;
018    
019    /**
020     * @author Michael C. Han
021     * @author Josef Sustacek
022     */
023    public class QuerySuggestionHitsProcessor implements HitsProcessor {
024    
025            @Override
026            public boolean process(SearchContext searchContext, Hits hits)
027                    throws SearchException {
028    
029                    QueryConfig queryConfig = searchContext.getQueryConfig();
030    
031                    if (!queryConfig.isQuerySuggestionEnabled()) {
032                            return true;
033                    }
034    
035                    if (hits.getLength() >=
036                                    queryConfig.getQuerySuggestionScoresThreshold()) {
037    
038                            return true;
039                    }
040    
041                    String[] querySuggestions = SearchEngineUtil.suggestKeywordQueries(
042                            searchContext, queryConfig.getQuerySuggestionMax());
043    
044                    querySuggestions = ArrayUtil.remove(
045                            querySuggestions, searchContext.getKeywords());
046    
047                    hits.setQuerySuggestions(querySuggestions);
048    
049                    return true;
050            }
051    
052    }