Example usage for org.apache.lucene.search IndexSearcher search

List of usage examples for org.apache.lucene.search IndexSearcher search

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Introduction

In this page you can find the example usage for org.apache.lucene.search IndexSearcher search.

Prototype

protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException

Source Link

Document

Lower-level search API.

Usage

From source file:ci6226.facetsearch.java

public static void main(String[] args) throws Exception {
    String index = "./myindex";
    String field = "text";
    String queries = null;//from  w w w  .j a  va2  s.  c  o m
    int hitsPerPage = 10;
    boolean raw = false;

    //http://lucene.apache.org/core/4_0_0/facet/org/apache/lucene/facet/doc-files/userguide.html#facet_accumulation

    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index)));
    IndexSearcher searcher = new IndexSearcher(reader);
    // :Post-Release-Update-Version.LUCENE_XY:

    //TODO: SAME AS HOW U BUILD INDEX
    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_47);
    BufferedReader in = null;
    if (queries != null) {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), "UTF-8"));
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
    }
    // :Post-Release-Update-Version.LUCENE_XY:
    QueryParser parser = new QueryParser(Version.LUCENE_47, field, analyzer);
    while (true) {

        System.out.println("Enter query: ");
        String line = in.readLine();
        line = line.trim();
        if (line.length() == 0) {
            break;
        }
        Query query = parser.parse(line);
        System.out.println("Searching for: " + query.toString(field));
        Date start = new Date();
        searcher.search(query, null, 100);
        Date end = new Date();
        System.out.println("Time: " + (end.getTime() - start.getTime()) + "ms");
        TopDocs results = searcher.search(query, 5 * hitsPerPage);
        ScoreDoc[] hits = results.scoreDocs;
        int numTotalHits = results.totalHits;

        //N= max docs
        //df = totoal matched doc
        //idf=log(N/df)

        for (int i = 0; i < hits.length; i++) {
            Document doc = searcher.doc(hits[i].doc);
            System.out.println(ANSI_BLUE + (i + 1) + ANSI_RESET + "\nScore=\t" + hits[i].score);
            String rtext = doc.get(field);
            System.out.println("Text=\t" + rtext);

            Terms vector = reader.getTermVector(i, "text");
            if (vector == null)
                continue;
            // System.out.println(vector.getSumDocFreq());

            // Terms vector = reader.getTermVector(hits[i].doc, field);  //hits[i].doc=docID
            TermsEnum termsEnum = vector.iterator(null);
            termsEnum = vector.iterator(termsEnum);
            Map<String, Integer> frequencies = new HashMap<>();
            BytesRef text = null;
            while ((text = termsEnum.next()) != null) {
                String term = text.utf8ToString();
                int freq = (int) termsEnum.totalTermFreq();
                frequencies.put(term, freq);
                // System.out.println("Time: "+term + " idef "+freq);
            }

        }

        //   String[] facetCatlog={""};

        System.out.println(numTotalHits + " total matching documents");

    }

    reader.close();
}

From source file:ci6226.loadIndex.java

public static void main(String[] args) throws Exception {
    String usage = "Usage:\tjava org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-query string] [-raw] [-paging hitsPerPage]\n\nSee http://lucene.apache.org/core/4_1_0/demo/ for details.";
    if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) {
        System.out.println(usage);
        System.exit(0);/*from w  ww.j av a  2s . com*/
    }
    String index = "./myindex";
    String field = "text";
    String queries = null;
    int hitsPerPage = 10;
    boolean raw = false;

    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index)));
    IndexSearcher searcher = new IndexSearcher(reader);
    // :Post-Release-Update-Version.LUCENE_XY:

    //TODO: SAME AS HOW U BUILD INDEX
    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_47);
    BufferedReader in = null;
    if (queries != null) {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), "UTF-8"));
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
    }
    // :Post-Release-Update-Version.LUCENE_XY:
    QueryParser parser = new QueryParser(Version.LUCENE_47, field, analyzer);
    while (true) {

        System.out.println("Enter query: ");
        String line = in.readLine();
        line = line.trim();
        if (line.length() == 0) {
            break;
        }
        Query query = parser.parse(line);
        System.out.println("Searching for: " + query.toString(field));
        Date start = new Date();
        searcher.search(query, null, 100);
        Date end = new Date();
        System.out.println("Time: " + (end.getTime() - start.getTime()) + "ms");
        doPagingSearch(in, searcher, query, hitsPerPage, raw, true, analyzer);
    }

    reader.close();
}

From source file:cn.hbu.cs.esearch.service.impl.EsearchSearchServiceImpl.java

License:Apache License

@Override
public SearchResult search(SearchRequest sResquest) throws EsearchException {
    try {/* www  .ja v a 2  s.  c o  m*/
        esearchSystem.flushEvents(2000);
    } catch (EsearchException e) {
        LOGGER.error("Esearch flush events error. \n{}", e);
    }
    String queryString = sResquest.getQuery();
    String queryField = sResquest.getField();
    LOGGER.info("The search request coming: queryField:{},queryString:{}", queryField, queryString);

    Analyzer analyzer = esearchSystem.getAnalyzer();
    QueryParser queryParser = new QueryParser(Version.LUCENE_43, queryField, analyzer);
    SearchResult result = new SearchResult();

    List<EsearchMultiReader<R>> readers = null;
    MultiReader multiReader = null;
    IndexSearcher searcher = null;
    try {
        Query query = null;
        if (Strings.isNullOrEmpty(queryString)) {
            query = new MatchAllDocsQuery();
        } else {
            query = queryParser.parse(queryString);
        }
        readers = esearchSystem.getIndexReaders();
        multiReader = new MultiReader(readers.toArray(new IndexReader[readers.size()]), false);
        searcher = new IndexSearcher(multiReader);
        long start = System.currentTimeMillis();
        TopDocs docs = searcher.search(query, null, sResquest.getSize());
        long end = System.currentTimeMillis();

        result.setTime(end - start);
        result.setTotalDocs(multiReader.numDocs());
        result.setTotalHits(docs.totalHits);

        LOGGER.info("Got {} hits. Cost:{} ms", docs.totalHits, end - start);

        if (sResquest.getSearchType() == SearchRequest.SearchType.COUNT) {
            return result;
        }

        ScoreDoc[] scoreDocs = docs.scoreDocs;
        ArrayList<SearchHit> hitList = new ArrayList<SearchHit>(scoreDocs.length);
        for (ScoreDoc scoreDoc : scoreDocs) {
            SearchHit hit = new SearchHit();
            hit.setScore(scoreDoc.score);
            int docID = scoreDoc.doc;

            Document doc = multiReader.document(docID);
            String content = doc.get(queryField);

            Scorer qs = new QueryScorer(query);

            SimpleHTMLFormatter formatter = new SimpleHTMLFormatter("<span class=\"hl\">", "</span>");
            Highlighter hl = new Highlighter(formatter, qs);
            String[] fragments = hl.getBestFragments(analyzer, queryField, content, 1);

            Map<String, String[]> fields = convert(doc, sResquest.getSearchType());
            fields.put("fragment", fragments);
            hit.setFields(fields);
            hitList.add(hit);
        }
        result.setHits(hitList.toArray(new SearchHit[hitList.size()]));
        return result;
    } catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
        throw new EsearchException(e.getMessage(), e);
    } finally {
        if (multiReader != null) {
            try {
                multiReader.close();
            } catch (IOException e) {
                LOGGER.error(e.getMessage(), e);
            }
        }
        esearchSystem.returnIndexReaders(readers);
    }
}

From source file:com.admarketplace.isg.lucene.demo.SearchFiles.java

License:Apache License

/** Simple command-line based search demo. */

public static void main(String[] args) throws Exception {

    String usage = "Usage:\tjava org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-query string] [-raw] [-paging hitsPerPage]\n\nSee http://lucene.apache.org/core/4_1_0/demo/ for details.";
    if (args.length <= 0 || ("-h".equals(args[0]) || "-help".equals(args[0]))) {
        System.out.println(usage);
        System.exit(0);//from  w  w  w.  j  a  v a  2s .  co m
    }

    String index = "index";
    String field = "contents";
    String queries = null;
    int repeat = 0;
    boolean raw = false;
    String queryString = null;
    int hitsPerPage = 10;

    for (int i = 0; i < args.length; i++) {
        if ("-index".equals(args[i])) {
            index = args[i + 1];
            i++;
        } else if ("-field".equals(args[i])) {
            field = args[i + 1];
            i++;
        } else if ("-queries".equals(args[i])) {
            queries = args[i + 1];
            i++;
        } else if ("-query".equals(args[i])) {
            queryString = args[i + 1];
            i++;
        } else if ("-repeat".equals(args[i])) {
            repeat = Integer.parseInt(args[i + 1]);
            i++;
        } else if ("-raw".equals(args[i])) {
            raw = true;
        } else if ("-paging".equals(args[i])) {
            hitsPerPage = Integer.parseInt(args[i + 1]);
            if (hitsPerPage <= 0) {
                System.err.println("There must be at least 1 hit per page.");
                System.exit(1);
            }
            i++;
        }
    }

    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index)));
    IndexSearcher searcher = new IndexSearcher(reader);
    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);

    BufferedReader in = null;
    if (queries != null) {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), "UTF-8"));
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
    }
    QueryParser parser = new QueryParser(Version.LUCENE_40, field, analyzer);
    while (true) {
        if (queries == null && queryString == null) { // prompt the user
            System.out.println("Enter query: ");
        }

        String line = queryString != null ? queryString : in.readLine();

        if (line == null || line.length() == -1) {
            break;
        }

        line = line.trim();
        if (line.length() == 0) {
            break;
        }

        Query query = parser.parse(line);
        System.out.println("Searching for: " + query.toString(field));

        if (repeat > 0) { // repeat & time as benchmark
            Date start = new Date();
            for (int i = 0; i < repeat; i++) {
                searcher.search(query, null, 100);
            }
            Date end = new Date();
            System.out.println("Time: " + (end.getTime() - start.getTime()) + "ms");
        }

        doPagingSearch(in, searcher, query, hitsPerPage, raw, queries == null && queryString == null);

        if (queryString != null) {
            break;
        }
    }
    reader.close();
}

From source file:com.agiletec.plugins.jacms.aps.system.services.searchengine.SearcherDAO.java

License:Open Source License

/**
 * Ricerca una lista di identificativi di contenuto in base 
 * al codice della lingua corrente ed alla parola immessa.
 * @param langCode Il codice della lingua corrente.
 * @param word La parola in base al quale fare la ricerca. Nel caso 
 * venissero inserite stringhe di ricerca del tipo "Venice Amsterdam" 
 * viene considerato come se fosse "Venice OR Amsterdam".
 * @param allowedGroups I gruppi autorizzati alla visualizzazione. Nel caso 
 * che la collezione sia nulla o vuota, la ricerca sar effettuata su contenuti 
 * referenziati con il gruppo "Ad accesso libero". Nel caso che nella collezione 
 * sia presente il gruppo degli "Amministratori", la ricerca produrr un'insieme 
 * di identificativi di contenuto non filtrati per gruppo.
 * @return La lista di identificativi contenuto.
 * @throws ApsSystemException//w w  w.j  av a 2s.  c  o  m
 */
public List<String> searchContentsId(String langCode, String word, Collection<String> allowedGroups)
        throws ApsSystemException {
    List<String> contentsId = new ArrayList<String>();
    IndexSearcher searcher = null;
    try {
        searcher = this.getSearcher();
        QueryParser parser = new QueryParser(Version.LUCENE_30, langCode, this.getAnalyzer());
        String queryString = this.createQueryString(langCode, word, allowedGroups);
        Query query = parser.parse(queryString);
        int maxSearchLength = 1000;
        TopDocs topDocs = searcher.search(query, null, maxSearchLength);
        ScoreDoc[] scoreDoc = topDocs.scoreDocs;
        if (scoreDoc.length > 0) {
            for (int index = 0; index < scoreDoc.length; index++) {
                ScoreDoc sDoc = scoreDoc[index];
                Document doc = searcher.doc(sDoc.doc);
                contentsId.add(doc.get(IIndexerDAO.CONTENT_ID_FIELD_NAME));
            }
        }
    } catch (IOException e) {
        throw new ApsSystemException("Errore in estrazione " + "documento in base ad indice", e);
    } catch (ParseException e) {
        throw new ApsSystemException("Errore parsing nella ricerca", e);
    } finally {
        this.releaseSearcher(searcher);
    }
    return contentsId;
}

From source file:com.baidu.rigel.biplatform.tesseract.isservice.netty.service.SearchServerHandler.java

License:Open Source License

@Override
public void messageReceived(ChannelHandlerContext ctx, Object msg) throws Exception {
    SearchRequestMessage searchReqeustMessage = (SearchRequestMessage) msg;

    String idxPath = searchReqeustMessage.getIdxPath();
    SearcherManager searcherManager = IndexSearcherFactory.getInstance().getSearcherManager(idxPath);
    IndexSearcher is = null;
    is = searcherManager.acquire();//  w w w. j  a v  a 2  s  .c om

    QueryRequest queryRequest = (QueryRequest) searchReqeustMessage.getMessageBody();
    Query queryAll = QueryRequestUtil.transQueryRequest2LuceneQuery(queryRequest);

    List<String> measureFieldList = new ArrayList<String>();
    List<String> dimFieldList = new ArrayList<String>();
    if (queryRequest.getSelect().getQueryMeasures() != null) {
        for (QueryMeasure qm : queryRequest.getSelect().getQueryMeasures()) {
            measureFieldList.add(qm.getProperties());
        }
    }

    if (queryRequest.getSelect().getQueryProperties() != null) {
        dimFieldList.addAll(queryRequest.getSelect().getQueryProperties());
    }

    TesseractResultSet searchResult = null;
    LinkedList<ResultRecord> resultRecordList = new LinkedList<ResultRecord>();
    long current = System.currentTimeMillis();
    try {
        QueryWrapperFilter filter = new QueryWrapperFilter(queryAll);
        Set<String> groupBy = new HashSet<>();
        if (queryRequest.getGroupBy() != null) {
            groupBy = queryRequest.getGroupBy().getGroups();
        }
        TesseractResultRecordCollector collector = new TesseractResultRecordCollector(
                dimFieldList.toArray(new String[0]), measureFieldList.toArray(new String[0]), groupBy);

        is.search(new MatchAllDocsQuery(), filter, collector);
        //            for (int docId : collector.getResultDocIdList()) {
        //                Document doc = is.getIndexReader().document(docId);
        //                ResultRecord record = new ResultRecord(doc);
        //                // ???
        //                // List<ResultRecord> recordList =
        //                // QueryRequestUtil.mapLeafValue2ValueOfRecord(record,
        //                // leafValueMap);
        //                
        //                resultRecordList.add(record);
        //                
        //            }
        logger.info("cost " + (System.currentTimeMillis() - current) + " in search,result:"
                + collector.getResult().size());
        current = System.currentTimeMillis();
        resultRecordList.addAll(collector.getResult());
    } finally {
        searcherManager.release(is);
    }

    // process result
    // group by
    if (queryRequest.getGroupBy() != null) {
        int dimSize = queryRequest.getSelect().getQueryProperties().size();
        searchResult = new SearchResultSet(AggregateCompute.aggregate(resultRecordList, dimSize,
                queryRequest.getSelect().getQueryMeasures()));
    } else {
        searchResult = new SearchResultSet(resultRecordList);
    }

    logger.info("cost " + (System.currentTimeMillis() - current)
            + " in result group by and prepare netty message.");
    current = System.currentTimeMillis();
    MessageHeader mh = new MessageHeader(NettyAction.NETTY_ACTION_SEARCH_FEEDBACK,
            Md5Util.encode(searchResult.toString()));
    SearchResultMessage searchResultMessage = new SearchResultMessage(mh, searchResult);
    ctx.writeAndFlush(searchResultMessage);
}

From source file:com.berico.clavin.resolver.impl.lucene.LuceneCoordinateIndex.java

License:Apache License

/**
 * Search for locations around the supplied coordinate.
 * @param coordinate Coordinate to search for nearby locations.
 * @param distanceInKm Kilometer radius to search around the
 * target coordinate for named locations.
 * @param limit Max number of results to return from the index.
 * @return ResolvedCoordinate instance./*  ww w  . j a  v  a 2 s. c  o m*/
 */
List<ResolvedCoordinate> performSearch(CoordinateOccurrence<?> coordinate, int distanceInKm, int limit)
        throws Exception {

    // Acquire a searcher.
    IndexSearcher searcher = this.lucene.getSearcherManager().acquire();

    // Convert the KM distance to degrees.
    double distanceInDegrees = DistanceUtils.dist2Degrees(distanceInKm, DistanceUtils.EARTH_MEAN_RADIUS_KM);

    // Convert the coordinate to it's lat/lon representation.
    LatLon center = coordinate.convertToLatLon();

    // Create a circular bounding box using the coordinate as the center
    // and the distance as the circle's radius.
    Circle queryBoundary = this.lucene.getSpatialContext().makeCircle(center.getLongitude(),
            center.getLatitude(), distanceInDegrees);

    // Create a spatial search configuration
    SpatialArgs spatialArgs = new SpatialArgs(SpatialOperation.Intersects, queryBoundary);

    // Get a Lucene filter from the spatial config.
    Filter filter = this.lucene.getSpatialStrategy().makeFilter(spatialArgs);

    // Search the index using the circle as a bounding box (er...circle).
    TopDocs results = searcher.search(new MatchAllDocsQuery(), filter, DEFAULT_LIMIT);

    // Convert the results to a ResolvedCoordinate
    return LuceneUtils.convertToCoordinate(coordinate, searcher, results, lucene);
}

From source file:com.cohesionforce.search.EMFIndex.java

License:Open Source License

/**
 * Searches the index for an attribute with a matching value.
 * //from www  .  j a  va 2  s.  c om
 * @param feature
 *            - the attribute to match when searching
 * @param value
 *            - the value to match when searching
 * @return a list of search results
 * @throws IllegalArgumentException
 *             if any parameters are null, or if the attribute is not marked
 *             with the search annotation
 * @throws IOException
 *             if there are issues reading the index
 */
public List<SearchResult> search(EStructuralFeature feature, String value)
        throws IllegalArgumentException, IOException {

    if (feature == null) {
        throw new IllegalArgumentException("Attribute cannot be null");
    }
    if (value == null) {
        throw new IllegalArgumentException("Value cannot be null");
    }

    List<SearchResult> rvalue = new ArrayList<SearchResult>();
    boolean tokenize = false;
    EAnnotation annotation = feature.getEAnnotation(EMFIndexUtil.SOURCE);
    if (annotation != null) {
        if (annotation.getDetails().containsKey(EMFIndexUtil.TOKENIZE_KEY)) {
            tokenize = true;
        }
    } else {
        // Bail out early if this feature should not be indexed
        throw new IllegalArgumentException("Attribute is not annotated to be indexed");
    }

    String key = EMFIndexUtil.getKey(feature);
    DirectoryReader reader = DirectoryReader.open(fsDir);
    IndexSearcher searcher = new IndexSearcher(reader);
    try {

        Query query = null;

        if (tokenize) {
            QueryParser parser = new QueryParser(version, key, analyzer);
            query = parser.parse(value);
        } else {
            Term term = new Term(key, value);
            query = new TermQuery(term);
        }

        ScoreDoc[] hits = searcher.search(query, null, MAX_SEARCH_RESULT).scoreDocs;

        // Iterate through the results:
        for (int i = 0; i < hits.length; i++) {
            Document hitDoc = searcher.doc(hits[i].doc);
            SearchResult result = new SearchResult(hitDoc);
            rvalue.add(result);
            logger.debug(hitDoc.toString());
        }
    } catch (ParseException e) {
        logger.error(e.getMessage());
    } finally {
        reader.close();
    }
    return rvalue;
}

From source file:com.cohesionforce.search.EMFIndex.java

License:Open Source License

/**
 * Searches the index for an attribute with a matching value and a matching
 * eclass/*from  ww w  .  j a va  2  s  .  c o  m*/
 * 
 * @param eclass
 *            - the EClass to match when searching
 * @param attr
 *            - the EAttribute to match when searching
 * @param value
 *            - the value to match when searching
 * @return a list of search results
 * @throws IllegalArgumentException
 *             if any parameters are null, or if the attribute is not marked
 *             with the search annotation
 * @throws IOException
 *             if there are issues reading the index
 */
public List<SearchResult> search(EClass eclass, EAttribute attr, String value)
        throws IllegalArgumentException, IOException {

    if (eclass == null) {
        throw new IllegalArgumentException("EClass cannot be null");
    }
    if (attr == null) {
        throw new IllegalArgumentException("Attribute cannot be null");
    }
    if (value == null) {
        throw new IllegalArgumentException("Value cannot be null");
    }

    EAnnotation annotation = eclass.getEAnnotation(EMFIndexUtil.SOURCE);
    if (annotation == null) {
        // Bail out early if this feature should not be indexed
        throw new IllegalArgumentException("EClass is not annotated to be indexed");
    }
    List<SearchResult> rvalue = new ArrayList<SearchResult>();
    boolean tokenize = false;
    annotation = attr.getEAnnotation(EMFIndexUtil.SOURCE);
    if (annotation != null) {
        if (annotation.getDetails().containsKey(EMFIndexUtil.TOKENIZE_KEY)) {
            tokenize = true;
        }
    } else {
        // Bail out early if this feature should not be indexed
        throw new IllegalArgumentException("Attribute is not annotated to be indexed");
    }

    String key = EMFIndexUtil.getKey(attr);

    DirectoryReader reader = DirectoryReader.open(fsDir);
    IndexSearcher searcher = new IndexSearcher(reader);
    try {

        BooleanQuery bquery = new BooleanQuery();

        TermQuery classQuery = new TermQuery(new Term(EMFIndexUtil.ETYPE_KEY, eclass.getName()));
        bquery.add(classQuery, Occur.MUST);

        Query query = null;
        if (tokenize) {
            QueryParser parser = new QueryParser(version, key, analyzer);
            query = parser.parse(value);
        } else {
            Term term = new Term(key, value);
            query = new TermQuery(term);
        }
        bquery.add(query, Occur.MUST);

        ScoreDoc[] hits = searcher.search(bquery, null, MAX_SEARCH_RESULT).scoreDocs;
        // Iterate through the results:
        for (int i = 0; i < hits.length; i++) {
            Document hitDoc = searcher.doc(hits[i].doc);
            SearchResult result = new SearchResult(hitDoc);
            rvalue.add(result);
            logger.debug(hitDoc.toString());
        }
    } catch (ParseException e) {
        logger.error(e.getMessage());
    } finally {
        reader.close();
    }
    return rvalue;
}

From source file:com.cohesionforce.search.EMFIndex.java

License:Open Source License

/**
 * Searches the index for a matching eclass
 * //  w ww .  ja  v a  2s  .  c  o m
 * @param eclass
 *            - the EClass to match when searching
 * @return a list of search results
 * @throws IllegalArgumentException
 *             if the eclass is null or is not annotated for indexing
 * @throws IOException
 *             if there are issues reading the index
 */
public List<SearchResult> search(EClass eclass) throws IllegalArgumentException, IOException {

    if (eclass == null) {
        throw new IllegalArgumentException("EClass cannot be null");
    }
    EAnnotation annotation = eclass.getEAnnotation(EMFIndexUtil.SOURCE);
    if (annotation == null) {
        throw new IllegalArgumentException("EClass is not annotated for indexing");
    }
    List<SearchResult> rvalue = new ArrayList<SearchResult>();

    DirectoryReader reader = DirectoryReader.open(fsDir);
    IndexSearcher searcher = new IndexSearcher(reader);
    try {
        TermQuery classQuery = new TermQuery(new Term(EMFIndexUtil.ETYPE_KEY, eclass.getName()));

        ScoreDoc[] hits = searcher.search(classQuery, null, MAX_SEARCH_RESULT).scoreDocs;
        // Iterate through the results:
        for (int i = 0; i < hits.length; i++) {
            Document hitDoc = searcher.doc(hits[i].doc);
            SearchResult result = new SearchResult(hitDoc);
            rvalue.add(result);
            logger.debug(hitDoc.toString());
        }
    } finally {
        reader.close();
    }
    return rvalue;
}