fr.paris.lutece.plugins.sponsoredlinks.service.sponsoredlinkssearch.SponsoredLinksLuceneSearchEngine.java Source code

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Here is the source code for fr.paris.lutece.plugins.sponsoredlinks.service.sponsoredlinkssearch.SponsoredLinksLuceneSearchEngine.java

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/*
 * Copyright (c) 2002-2014, Mairie de Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.plugins.sponsoredlinks.service.sponsoredlinkssearch;

import fr.paris.lutece.plugins.sponsoredlinks.service.search.SponsoredLinksIndexer;
import fr.paris.lutece.portal.service.search.IndexationService;
import fr.paris.lutece.portal.service.search.LuceneSearchEngine;
import fr.paris.lutece.portal.service.search.SearchItem;
import fr.paris.lutece.portal.service.util.AppLogService;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.queries.ChainedFilter;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.CachingWrapperFilter;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryWrapperFilter;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;

/**
 * class LuceneSearchEngine
 */
public class SponsoredLinksLuceneSearchEngine implements SponsoredLinksSearchEngine {
    /**
     * {@inheritDoc}
     */
    public List<SponsoredLinksSearchItem> getSearchResults(String strQuery) {
        List<SponsoredLinksSearchItem> listResults = new ArrayList<SponsoredLinksSearchItem>();
        IndexSearcher searcher = null;
        Filter filter = null;
        Query query = null;

        try {
            IndexReader ir = DirectoryReader.open(IndexationService.getDirectoryIndex());
            searcher = new IndexSearcher(ir);

            //filter on content
            if (StringUtils.isNotBlank(strQuery)) {
                QueryParser parser = new QueryParser(IndexationService.LUCENE_INDEX_VERSION,
                        SearchItem.FIELD_CONTENTS, IndexationService.getAnalyser());
                query = parser.parse((strQuery != null) ? strQuery : "");
            }

            //filter on sponsoredlink type
            Filter[] filters = null;

            Query queryTypeSponsoredLink = new TermQuery(
                    new Term(SearchItem.FIELD_TYPE, SponsoredLinksIndexer.INDEX_TYPE_SPONSOREDLINKS));
            filters = new Filter[1];

            filters[filters.length - 1] = new CachingWrapperFilter(new QueryWrapperFilter(queryTypeSponsoredLink));
            filter = new ChainedFilter(filters, ChainedFilter.AND);

            TopDocs topDocs = searcher.search(query, filter, LuceneSearchEngine.MAX_RESPONSES);

            ScoreDoc[] hits = topDocs.scoreDocs;

            for (int i = 0; i < hits.length; i++) {
                int docId = hits[i].doc;
                Document document = searcher.doc(docId);
                SponsoredLinksSearchItem si = new SponsoredLinksSearchItem(document);
                listResults.add(si);
            }
        } catch (Exception e) {
            AppLogService.error(e.getMessage(), e);
        }

        return listResults;
    }
}