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

Introduction

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

Prototype

public <C extends Collector, T> T search(Query query, CollectorManager<C, T> collectorManager)
        throws IOException 

Source Link

Document

Lower-level search API.

Usage

From source file:aos.lucene.search.msc.PrefixQueryTest.java

License:Apache License

public void testPrefix() throws Exception {
    Directory dir = TestUtil.getBookIndexDirectory();
    IndexSearcher searcher = new IndexSearcher(dir);

    Term term = new Term("category", //#A
            "/technology/computers/programming"); //#A
    PrefixQuery query = new PrefixQuery(term); //#A

    TopDocs matches = searcher.search(query, 10); //#A
    int programmingAndBelow = matches.totalHits;

    matches = searcher.search(new TermQuery(term), 10); //#B
    int justProgramming = matches.totalHits;

    assertTrue(programmingAndBelow > justProgramming);
    searcher.close();/*from w  w w  . ja v  a2 s .  co  m*/
    dir.close();
}

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From source file:aos.lucene.search.msc.ScoreTest.java

License:Apache License

public void testSimple() throws Exception {
    indexSingleFieldDocs(new Field[] { new Field("contents", "x", Field.Store.YES, Field.Index.ANALYZED) });
    IndexSearcher searcher = new IndexSearcher(directory);
    searcher.setSimilarity(new SimpleSimilarity());

    Query query = new TermQuery(new Term("contents", "x"));
    Explanation explanation = searcher.explain(query, 0);
    LOGGER.info(explanation);//from   w ww  .ja v a2 s  .  c  om

    TopDocs matches = searcher.search(query, 10);
    assertEquals(1, matches.totalHits);

    assertEquals(1F, matches.scoreDocs[0].score, 0.0);

    searcher.close();
}

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From source file:aos.lucene.search.msc.ScoreTest.java

License:Apache License

public void testWildcard() throws Exception {
    indexSingleFieldDocs(new Field[] { new Field("contents", "wild", Field.Store.YES, Field.Index.ANALYZED),
            new Field("contents", "child", Field.Store.YES, Field.Index.ANALYZED),
            new Field("contents", "mild", Field.Store.YES, Field.Index.ANALYZED),
            new Field("contents", "mildew", Field.Store.YES, Field.Index.ANALYZED) });

    IndexSearcher searcher = new IndexSearcher(directory);
    Query query = new WildcardQuery(new Term("contents", "?ild*")); //#A
    TopDocs matches = searcher.search(query, 10);
    assertEquals("child no match", 3, matches.totalHits);

    assertEquals("score the same", matches.scoreDocs[0].score, matches.scoreDocs[1].score, 0.0);
    assertEquals("score the same", matches.scoreDocs[1].score, matches.scoreDocs[2].score, 0.0);
    searcher.close();/* w  w  w. j a  v  a 2  s .co m*/
}

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From source file:aos.lucene.search.msc.ScoreTest.java

License:Apache License

public void testFuzzy() throws Exception {
    indexSingleFieldDocs(new Field[] { new Field("contents", "fuzzy", Field.Store.YES, Field.Index.ANALYZED),
            new Field("contents", "wuzzy", Field.Store.YES, Field.Index.ANALYZED) });

    IndexSearcher searcher = new IndexSearcher(directory);
    Query query = new FuzzyQuery(new Term("contents", "wuzza"));
    TopDocs matches = searcher.search(query, 10);
    assertEquals("both close enough", 2, matches.totalHits);

    assertTrue("wuzzy closer than fuzzy", matches.scoreDocs[0].score != matches.scoreDocs[1].score);

    Document doc = searcher.doc(matches.scoreDocs[0].doc);
    assertEquals("wuzza bear", "wuzzy", doc.get("contents"));
    searcher.close();/*from  w  w w.ja v a 2  s  . co m*/
}

---

From source file:aos.lucene.search.msc.TermRangeQueryTest.java

License:Apache License

public void testTermRangeQuery() throws Exception {
    Directory dir = TestUtil.getBookIndexDirectory();
    IndexSearcher searcher = new IndexSearcher(dir);
    TermRangeQuery query = new TermRangeQuery("title2", "d", "j", true, true);

    TopDocs matches = searcher.search(query, 100);
    /*//from   www  .  j  ava2  s  .  c  o  m
    for(int i=0;i<matches.totalHits;i++) {
      LOGGER.info("match " + i + ": " + searcher.doc(matches.scoreDocs[i].doc).get("title2"));
    }
    */
    assertEquals(3, matches.totalHits);
    searcher.close();
    dir.close();
}

---

From source file:aos.lucene.tools.BerkeleyDbJESearcher.java

License:Apache License

public static void main(String[] args) throws IOException, DatabaseException {

    if (args.length != 1) {
        System.err.println("Usage: BerkeleyDbSearcher <index dir>");
        System.exit(-1);/*from   www .j  a v  a2  s . c o m*/
    }
    File indexFile = new File(args[0]);

    EnvironmentConfig envConfig = new EnvironmentConfig();
    DatabaseConfig dbConfig = new DatabaseConfig();

    envConfig.setTransactional(true);
    envConfig.setAllowCreate(true);
    dbConfig.setTransactional(true);
    dbConfig.setAllowCreate(true);

    Environment env = new Environment(indexFile, envConfig);

    Database index = env.openDatabase(null, "__index__", dbConfig);
    Database blocks = env.openDatabase(null, "__blocks__", dbConfig);

    JEDirectory directory = new JEDirectory(null, index, blocks);

    IndexSearcher searcher = new IndexSearcher(directory, true);
    TopDocs hits = searcher.search(new TermQuery(new Term("contents", "fox")), 10);
    LOGGER.info(hits.totalHits + " documents found");
    searcher.close();

    index.close();
    blocks.close();
    env.close();
}

---

From source file:aos.lucene.tools.BerkeleyDbSearcher.java

License:Apache License

public static void main(String[] args) throws IOException, DatabaseException {
    if (args.length != 1) {
        System.err.println("Usage: BerkeleyDbSearcher <index dir>");
        System.exit(-1);// ww w. j  a v a2s.c o m
    }
    File indexFile = new File(args[0]);

    EnvironmentConfig envConfig = new EnvironmentConfig();
    DatabaseConfig dbConfig = new DatabaseConfig();

    envConfig.setTransactional(true);
    envConfig.setInitializeCache(true);
    envConfig.setInitializeLocking(true);
    envConfig.setInitializeLogging(true);
    envConfig.setAllowCreate(true);
    envConfig.setThreaded(true);
    dbConfig.setAllowCreate(true);
    dbConfig.setType(DatabaseType.BTREE);

    Environment env = new Environment(indexFile, envConfig);

    Database index = env.openDatabase(null, "__index__", null, dbConfig);
    Database blocks = env.openDatabase(null, "__blocks__", null, dbConfig);

    DbDirectory directory = new DbDirectory(null, index, blocks, 0);

    IndexSearcher searcher = new IndexSearcher(directory, true);
    TopDocs hits = searcher.search(new TermQuery(new Term("contents", "fox")), 10);
    LOGGER.info(hits.totalHits + " documents found");
    searcher.close();

    index.close();
    blocks.close();
    env.close();
}

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From source file:aos.lucene.tools.BooksMoreLikeThis.java

License:Apache License

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

    String indexDir = System.getProperty("index.dir");
    FSDirectory directory = FSDirectory.open(new File(indexDir));
    IndexReader reader = DirectoryReader.open(directory);

    IndexSearcher searcher = new IndexSearcher(reader);

    int numDocs = reader.maxDoc();

    MoreLikeThis mlt = new MoreLikeThis(reader);
    mlt.setFieldNames(new String[] { "title", "author" });
    mlt.setMinTermFreq(1);//from  w  w w  .  j a v a2  s .com
    mlt.setMinDocFreq(1);

    for (int docID = 0; docID < numDocs; docID++) {
        LOGGER.info();
        Document doc = reader.document(docID);
        LOGGER.info(doc.get("title"));

        Query query = mlt.like(docID);
        LOGGER.info("  query=" + query);

        TopDocs similarDocs = searcher.search(query, 10);
        if (similarDocs.totalHits == 0)
            LOGGER.info("  None like this");
        for (int i = 0; i < similarDocs.scoreDocs.length; i++) {
            if (similarDocs.scoreDocs[i].doc != docID) {
                doc = reader.document(similarDocs.scoreDocs[i].doc);
                LOGGER.info("  -> " + doc.getField("title").stringValue());
            }
        }
    }

    reader.close();
    directory.close();
}

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From source file:aos.lucene.tools.FastVectorHighlighterSample.java

License:Apache License

static void searchIndex(String filename) throws Exception {
    QueryParser parser = new QueryParser(Version.LUCENE_46, F, analyzer);
    Query query = parser.parse(QUERY);
    FastVectorHighlighter highlighter = getHighlighter(); // #C
    FieldQuery fieldQuery = highlighter.getFieldQuery(query); // #D
    IndexSearcher searcher = new IndexSearcher(dir);
    TopDocs docs = searcher.search(query, 10);

    FileWriter writer = new FileWriter(filename);
    writer.write("<html>");
    writer.write("<body>");
    writer.write("<p>QUERY : " + QUERY + "</p>");
    for (ScoreDoc scoreDoc : docs.scoreDocs) {
        String snippet = highlighter.getBestFragment( // #E
                fieldQuery, searcher.getIndexReader(), // #E
                scoreDoc.doc, F, 100); // #E
        if (snippet != null) {
            writer.write(scoreDoc.doc + " : " + snippet + "<br/>");
        }/*from  w  w w . ja  v  a 2  s .c  o m*/
    }
    writer.write("</body></html>");
    writer.close();
}

---

From source file:aos.lucene.tools.HighlightTest.java

License:Apache License

public void testHits() throws Exception {
    IndexSearcher searcher = new IndexSearcher(TestUtil.getBookIndexDirectory());
    TermQuery query = new TermQuery(new Term("title", "action"));
    TopDocs hits = searcher.search(query, 10);

    QueryScorer scorer = new QueryScorer(query, "title");
    Highlighter highlighter = new Highlighter(scorer);
    highlighter.setTextFragmenter(new SimpleSpanFragmenter(scorer));

    Analyzer analyzer = new SimpleAnalyzer();

    for (ScoreDoc sd : hits.scoreDocs) {
        Document doc = searcher.doc(sd.doc);
        String title = doc.get("title");

        TokenStream stream = TokenSources.getAnyTokenStream(searcher.getIndexReader(), sd.doc, "title", doc,
                analyzer);/*w  w w. j a v a 2 s . c  o  m*/
        String fragment = highlighter.getBestFragment(stream, title);

        LOGGER.info(fragment);
    }
}

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