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

Introduction

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

Prototype

public IndexSearcher(IndexReaderContext context) 

Source Link

Document

Creates a searcher searching the provided top-level IndexReaderContext .

Usage

From source file:com.icdd.lucence.SearchFiles.java

License:Apache License

public List<Document> searchFilesWeb(String queryString) {
    // //from  w w  w  . j a  v  a2 s  .  co  m
    String index = "F:/download/index/";
    // 
    String field = "contents";
    int repeat = 0;
    // ????
    boolean raw = false;
    // ?10?
    int hitsPerPage = 10;
    List<Document> docs = new ArrayList<Document>();
    try {
        IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(index)));
        IndexSearcher searcher = new IndexSearcher(reader);
        Analyzer analyzer = new StandardAnalyzer();

        QueryParser parser = new QueryParser(field, analyzer);

        if (queryString == null) {
            System.out.println("Enter query:");
            return null;
        }
        String line = queryString;
        line = line.trim();
        if (line.length() == 0) {
            return null;
        }
        try {
            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, 100);
                }
                Date end = new Date();
                System.out.println("Time: " + (end.getTime() - start.getTime()) + "ms");
            }

            docs = doPagingSearchWeb(docs, searcher, query, hitsPerPage, raw);
        } catch (ParseException e) {

            e.printStackTrace();
        }
        reader.close();

    } catch (IOException e) {

        e.printStackTrace();
    }
    return docs;
}

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From source file:com.ideabase.dictionary.core.impl.LuceneIndexManager.java

License:Open Source License

private void initiateIndexReader() {
    mLogger.info("Initiating Index Reader");
    try {/*from   www  .  j a v  a2  s .  c  o m*/
        mIndexSearcher = new IndexSearcher(mIndexDirectory);
        if (mLogger.isDebugEnabled()) {
            mLogger.debug("Max doc - " + mIndexSearcher.maxDoc());
        }
    } catch (FileNotFoundException fne) {
        mLogger.warn("File not found");
    } catch (IOException e) {
        throw new RuntimeException("Failed to initiate index reader for " + mIndexDirectory, e);
    }
}

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From source file:com.ikon.analysis.SearchDemo.java

License:Open Source License

/**
 * Search in documents/* w  w  w .j a  v a2  s  .c  o m*/
 */
private static void search(Directory index, Analyzer analyzer, String str)
        throws ParseException, CorruptIndexException, IOException {
    IndexReader reader = IndexReader.open(index);
    IndexSearcher searcher = new IndexSearcher(reader);
    TopScoreDocCollector collector = TopScoreDocCollector.create(NUM_HITS, true);
    //Query q = new QueryParser(Config.LUCENE_VERSION, DOC_FIELD, analyzer).parse(str);
    Query q = new WildcardQuery(new Term(DOC_FIELD, str));
    System.out.println("Query: " + q);

    searcher.search(q, collector);
    ScoreDoc[] hits = collector.topDocs().scoreDocs;

    System.out.println("Found " + hits.length + " hits.");

    for (int i = 0; i < hits.length; ++i) {
        int docId = hits[i].doc;
        Document d = searcher.doc(docId);
        System.out.println((i + 1) + ". " + d.get(DOC_FIELD));
    }

    searcher.close();
}

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From source file:com.impetus.kundera.index.LucandraIndexer.java

License:Apache License

@SuppressWarnings("deprecation")
@Override/*ww  w . j  av a2s .  c  om*/
public final List<String> search(String luceneQuery, int start, int count) {

    if (Constants.INVALID == count) {
        count = 100;
    }

    log.debug("Searhcing index with query[" + luceneQuery + "], start:" + start + ", count:" + count);

    Set<String> entityIds = new HashSet<String>();

    org.apache.lucene.index.IndexReader indexReader = null;
    try {
        if (client.getType().equals(DBType.CASSANDRA)) {
            indexReader = new IndexReader(INDEX_NAME, ((CassandraClient) client).getCassandraClient());
        } else {
            indexReader = getDefaultReader();
        }
    } catch (Exception e) {
        throw new IndexingException(e.getMessage());
    }
    IndexSearcher searcher = new IndexSearcher(indexReader);

    QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, DEFAULT_SEARCHABLE_FIELD, analyzer);
    try {
        Query q = qp.parse(luceneQuery);
        TopDocs docs = searcher.search(q, count);

        for (ScoreDoc sc : docs.scoreDocs) {
            Document doc = searcher.doc(sc.doc);
            entityIds.add(doc.get(ENTITY_ID_FIELD));
        }
    } catch (ParseException e) {
        new IndexingException(e.getMessage());
    } catch (IOException e) {
        new IndexingException(e.getMessage());
    }

    log.debug("Result[" + entityIds + "]");
    return new ArrayList<String>(entityIds);
}

---

From source file:com.impetus.kundera.index.LuceneIndexer.java

License:Apache License

@Override
public final Map<String, Object> search(String luceneQuery, int start, int count, boolean fetchRelation,
        KunderaMetadata kunderaMetadata, EntityMetadata metadata) {
    boolean isEmbeddedId = false;

    MetamodelImpl metaModel = null;/* w ww.  j  a va2 s .c  o m*/
    if (kunderaMetadata != null && metadata != null) {
        metaModel = (MetamodelImpl) kunderaMetadata.getApplicationMetadata()
                .getMetamodel(metadata.getPersistenceUnit());
        isEmbeddedId = metaModel.isEmbeddable(metadata.getIdAttribute().getBindableJavaType());
    }
    reader = getIndexReader();

    if (Constants.INVALID == count) {
        count = 100;
    }

    if (log.isDebugEnabled()) {
        log.debug("Searching index with query[{}], start:{} , count:" + count, luceneQuery, start);
    }

    // Set<String> entityIds = new HashSet<String>();
    Map<String, Object> indexCol = new HashMap<String, Object>();

    if (reader == null) {

        return indexCol;
        // throw new
        // LuceneIndexingException("Index reader is not initialized!");
    }
    QueryParser qp = null;
    IndexSearcher searcher = new IndexSearcher(reader);

    qp = new QueryParser(DEFAULT_SEARCHABLE_FIELD, new StandardAnalyzer());

    try {
        // to make like query case insensitive
        // qp.setLowercaseExpandedTerms(true);
        qp.setAllowLeadingWildcard(true);
        // qp.set
        Query q = qp.parse(luceneQuery);

        TopDocs docs = searcher.search(q, count);

        int nullCount = 0;

        // Assuming Supercol will be null in case if alias only.
        // This is a quick fix
        if (isEmbeddedId) {
            prepareEmbeddedId(docs, indexCol, searcher, metadata, metaModel);
        } else {
            for (ScoreDoc sc : docs.scoreDocs) {

                Document doc = searcher.doc(sc.doc);
                String entityId = doc.get(
                        fetchRelation ? IndexingConstants.PARENT_ID_FIELD : IndexingConstants.ENTITY_ID_FIELD);
                String superCol = doc.get(SUPERCOLUMN_INDEX);

                if (superCol == null) {
                    superCol = "SuperCol" + nullCount++;
                }
                // In case of super column and association.
                indexCol.put(superCol + "|" + entityId, entityId);
            }

        }
    } catch (Exception e) {
        log.error("Error while parsing Lucene Query {} ", luceneQuery, e);
        throw new LuceneIndexingException(e);
    }

    reader = null;
    return indexCol;
}

---

From source file:com.intuit.tank.search.lucene.LuceneService.java

License:Open Source License

/**
 * Gets a searcher for the search index location
 * //  w w w .  ja va 2  s . c om
 * @return
 */
private IndexSearcher getSearcher() {
    IndexSearcher searcher = null;
    try {
        IndexReader reader = getReader();
        if (!reader.isCurrent()) {
            reader.reopen();
        }
        searcher = new IndexSearcher(reader);
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException();
    }
    return searcher;
}

---

From source file:com.isa.basic.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);/* ww  w  . j av  a  2 s.c o 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(Paths.get(index)));
    IndexSearcher searcher = new IndexSearcher(reader);
    Analyzer analyzer = new StandardAnalyzer();

    BufferedReader in = null;
    if (queries != null) {
        in = Files.newBufferedReader(Paths.get(queries), StandardCharsets.UTF_8);
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
    }
    QueryParser parser = new QueryParser(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++) {
                TopDocs searchResults = 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.it.lucene.test.IndexSearch.java

private void doSearch(Query query) {
    try {//w  ww  .j  a  v  a 2 s.  c om
        // 2?IndexSearcher
        // 2.1 IndexReader
        // 2.1Directory
        Directory directory = FSDirectory.open(new File("F:\\Lucene Index"));
        IndexReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);
        // 3?indexSearcher?
        // ?
        TopDocs topDocs = searcher.search(query, 10);

        // 4??
        // ???
        long count = topDocs.totalHits;

        System.out.println("???:" + count);

        ScoreDoc[] scoreDocs = topDocs.scoreDocs;

        for (ScoreDoc scoreDoc : scoreDocs) {
            int docId = scoreDoc.doc;
            Document doc = searcher.doc(docId);
            System.out.println("?ID" + doc.get("id"));
            System.out.println("???" + doc.get("name"));
            System.out.println("?" + doc.get("price"));
            System.out.println("?pic" + doc.get("pic"));
        }
        // 5?IndexReader
        reader.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:com.ivannotes.searchbee.demo.TxtSearchBee.java

License:Apache License

@Override
protected IndexSearcher getIndexSearcher() {
    try {/*  ww  w  .j  av  a  2 s. c  om*/
        IndexReader reader;
        reader = IndexReader.open(FSDirectory.open(new File(idxPath)));
        IndexSearcher searcher = new IndexSearcher(reader);

        return searcher;
    } catch (Exception e) {
        throw new RuntimeException("Get index searcher error. ", e);
    }
}

---

From source file:com.jaeksoft.searchlib.index.ReaderLocal.java

License:Open Source License

ReaderLocal(IndexConfig indexConfig, IndexDirectory indexDirectory) throws IOException, SearchLibException {
    super(indexConfig);
    spellCheckCache = new SpellCheckCache(100);
    docSetHitsCache = new DocSetHitsCache(indexConfig);
    this.indexDirectory = indexDirectory;
    references = new AtomicInteger(0);
    acquire();/* w ww  .j  a v  a2s . co  m*/
    Directory directory = indexDirectory.getDirectory();
    if (directory == null)
        throw new IOException("The directory is closed");
    if (indexConfig.isMulti()) {
        List<String> indexList = indexConfig.getIndexList();
        indexDirectories = new IndexDirectory[indexList.size()];
        indexReaders = new IndexReader[indexList.size()];
        int i = 0;
        for (String indexName : indexList) {
            IndexDirectory indexDir = new IndexDirectory(
                    new File(ClientCatalog.getClient(indexName).getDirectory(), "index"));
            indexDirectories[i] = indexDir;
            indexReaders[i++] = IndexReader.open(indexDir.getDirectory());
        }
        indexReader = new MultiReader(indexReaders);
    } else {
        indexReaders = null;
        indexDirectories = null;
        indexReader = IndexReader.open(directory);
    }
    indexSearcher = new IndexSearcher(indexReader);

    Similarity similarity = indexConfig.getNewSimilarityInstance();
    if (similarity != null)
        indexSearcher.setSimilarity(similarity);
}

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