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:bajavista.Buscador.java

public ArrayList<Informacion> buscarContenido(String busqueda) throws IOException, ParseException {
    StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_43);

    File indexDirES = new File(dirIndexES);
    Directory indexES = FSDirectory.open(indexDirES);
    //File indexDirNONES = new File(dirIndexNONES);
    //Directory indexNONES = FSDirectory.open(indexDirNONES);

    // 2. Query//from w  w w . java  2 s  .  c  om
    String querystr = busqueda;

    Query q = new QueryParser(Version.LUCENE_43, "text", analyzer).parse(querystr);
    //Query qNONES = new QueryParser(Version.LUCENE_43, "contenido", analyzer).parse(querystr);

    // 3. Search
    int hitsPage = 1024;
    IndexReader reader = DirectoryReader.open(indexES);
    IndexSearcher searcher = new IndexSearcher(reader);

    //IndexReader readerNONES = DirectoryReader.open(indexNONES);
    //IndexSearcher searcherNONES = new IndexSearcher(readerNONES);
    TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPage, true);
    //TopScoreDocCollector collectorNONES = TopScoreDocCollector.create(hitsPage, true);

    searcher.search(q, collector);
    //searcherNONES.search(q, collectorNONES);

    ScoreDoc[] hits = collector.topDocs().scoreDocs;
    // ScoreDoc[] hitsNONES = collectorNONES.topDocs().scoreDocs;

    // 4. Return results
    for (int i = 0; i < hits.length; ++i) {
        int docId = hits[i].doc;
        Document data = searcher.doc(docId);
        info = new Informacion(Integer.parseInt(data.get("idUser")), Long.parseLong(data.get("timestamp")),
                data.get("text"), Double.parseDouble(data.get("objective")),
                Double.parseDouble(data.get("subjective")), Double.parseDouble(data.get("positive")),
                Double.parseDouble(data.get("negative")), Integer.parseInt(data.get("need")));
        listaInfo.add(info);
    }

    /*System.out.println("No ES Found " + hitsNONES.length + " hits.");
     for(int i=0;i<hitsNONES.length;++i) {
     int docId = hitsNONES[i].doc;
     Document d = searcherNONES.doc(docId);
     System.out.println((i + 1) + ". " + d.get("es") + "\t" + d.get("contenido"));
     }*/
    reader.close();
    //readerNONES.close();

    return listaInfo;
}

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From source file:bbejeck.nosql.lucene.LuceneSqlFileSystemSearchBase.java

License:Apache License

@Override
public void openSearcher() throws Exception {
    ireader = DirectoryReader.open(fsDirectory);
    isearcher = new IndexSearcher(ireader);
}

---

From source file:bbejeck.nosql.lucene.LuceneSqlSearchBase.java

License:Apache License

public void openSearcher() throws Exception {
    ireader = DirectoryReader.open(ramDirectory);
    isearcher = new IndexSearcher(ireader);
}

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From source file:be.ugent.tiwi.sleroux.newsrec.newsreclib.termExtract.LuceneTopTermExtract.java

License:Apache License

/**
 * Returns the 10 most important terms in the document with the specified
 * id.//from w ww. j  a  va 2  s.c o m
 *
 * @param id
 * @param reader
 * @param numberOfTerms
 * @return
 */
public Map<String, Double> getTopTerms(String id, IndexReader reader, int numberOfTerms) {
    try {
        IndexSearcher searcher = new IndexSearcher(reader);
        TopScoreDocCollector collector = TopScoreDocCollector.create(1, true);
        Query q = new TermQuery(new Term("id", id));
        searcher.search(q, collector);
        if (collector.getTotalHits() > 0) {
            int docNr = collector.topDocs().scoreDocs[0].doc;
            return getTopTerms(docNr, reader, numberOfTerms);
        } else {
            logger.warn("No document found with id=" + id);
        }
    } catch (IOException ex) {
        logger.error(ex);
    }
    return new HashMap<>(0);
}

---

From source file:be.ugent.tiwi.sleroux.newsrec.recommendationstester.LuceneTopTermExtract.java

License:Apache License

public Map<String, Double> getTopTerms(String id, IndexReader reader, int numberOfTerms) {
    try {/*  w w  w  .  ja v  a2s .c o m*/
        IndexSearcher searcher = new IndexSearcher(reader);
        TopScoreDocCollector collector = TopScoreDocCollector.create(1, true);
        Query q = new TermQuery(new Term("id", id));
        searcher.search(q, collector);
        if (collector.getTotalHits() > 0) {
            int docNr = collector.topDocs().scoreDocs[0].doc;
            return getTopTerms(docNr, reader, numberOfTerms);
        } else {
            logger.warn("No document found with id=" + id);
        }
    } catch (IOException ex) {
        logger.error(ex);
    }
    return new HashMap<>(0);
}

---

From source file:biospectra.classify.Classifier.java

License:Apache License

private void initialize(File indexPath, int kmerSize, int kmerSkips, boolean minStrandKmer,
        double minShouldMatch, QueryGenerationAlgorithm queryGenerationAlgorithm, Similarity similarity)
        throws Exception {
    if (!indexPath.exists() || !indexPath.isDirectory()) {
        throw new IllegalArgumentException("indexPath is not a directory or does not exist");
    }/*from   ww  w .  ja  v  a 2  s .com*/

    this.indexPath = indexPath;
    this.kmerSize = kmerSize;
    this.kmerSkips = kmerSkips;
    this.minStrandKmer = minStrandKmer;
    this.queryAnalyzer = new KmerQueryAnalyzer(this.kmerSize, this.kmerSkips, this.minStrandKmer);
    Directory dir = new MMapDirectory(this.indexPath.toPath());
    this.indexReader = DirectoryReader.open(dir);
    this.indexSearcher = new IndexSearcher(this.indexReader);
    if (similarity != null) {
        this.indexSearcher.setSimilarity(similarity);
    }
    this.minShouldMatch = minShouldMatch;
    this.queryGenerationAlgorithm = queryGenerationAlgorithm;

    BooleanQuery.setMaxClauseCount(10000);
}

---

From source file:book.Searcher.java

License:Apache License

public static void search(String indexDir, String q) throws IOException, ParseException {

    IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(indexDir).toPath()));
    IndexSearcher is = new IndexSearcher(reader);

    //alt: Directory dir = FSDirectory.open(new File(indexDir)); // 3
    //alt: IndexSearcher is = IndexSearcher(dir); // 3

    QueryParser parser = new QueryParser("contents", // 4
            new StandardAnalyzer()); // 4
    Query query = parser.parse(q); // 4
    long start = System.currentTimeMillis();
    TopDocs hits = is.search(query, 10); // 5
    long end = System.currentTimeMillis();

    System.err.println("Found " + hits.totalHits + // 6
            " document(s) (in " + (end - start) + // 6
            " milliseconds) that matched query '" + // 6
            q + "':"); // 6

    for (ScoreDoc scoreDoc : hits.scoreDocs) {
        Document doc = is.doc(scoreDoc.doc); // 7
        System.out.println(doc.get("fullpath")); // 8
    }//from  w  ww.  ja v  a 2s.c om

    //was: is.close(); // 9
}

---

From source file:bostoncase.widgets.SearchFiles.java

License:Apache License

private static void init(String index) throws IOException {
    reader = DirectoryReader.open(FSDirectory.open(Paths.get(index)));
    searcher = new IndexSearcher(reader);
    analyzer = new StandardAnalyzer();
    parser = new QueryParser(field, analyzer);
}

---

From source file:bostoncase.widgets.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);//w  w  w.  j  a  va  2s.  c o  m
    }

    String index = "/Users/michaelhundt/Documents/Meine/Studium/MASTER/MasterProject/data/lucene_index/";
    String field = "content";
    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)));
    //      IndexReader reader = StandardDirectoryReader.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);
        if (line.equals("geo")) {
            //            query = new GeoPointInBBoxQuery("geo", 42.2279, 42.3969, -70.9235, -71.1908);
            //            query = new GeoPointInBBoxQuery("geo", -71.1908, -70.9235, 42.2279, 42.3969);
            query = new GeoPointInBBoxQuery("geo", 42.2279, 42.3969, -71.1908, -70.9235);
        }

        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");
        }

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

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

---

From source file:br.andrew.lucene.testing.SearchFiles.java

License:Apache License

/** Simple command-line based search demo. */
public static void main(final String[] args) throws Exception {
    final 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  a v  a2s. 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++;
        }
    }

    final IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index)));
    final IndexSearcher searcher = new IndexSearcher(reader);
    final 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"));
    }
    final 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;
        }

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

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

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

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

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