Example usage for org.apache.lucene.index DirectoryReader open

Introduction

In this page you can find the example usage for org.apache.lucene.index DirectoryReader open.

Prototype

public static DirectoryReader open(final IndexCommit commit) throws IOException 

Source Link

Document

Expert: returns an IndexReader reading the index in the given IndexCommit .

Usage

From source file:com.mathworks.xzheng.indexing.IndexingTest.java

License:Apache License

protected int getHitCount(String fieldName, String searchString) throws IOException {
    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(directory)); //4
    Term t = new Term(fieldName, searchString);
    Query query = new TermQuery(t); //5
    int hitCount = TestUtil.hitCount(searcher, query); //6
    searcher.getIndexReader().close();/*  w w  w  . ja  v a 2s .c om*/
    return hitCount;
}

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From source file:com.mathworks.xzheng.meetlucene.Fragments.java

License:Apache License

public void simpleSearch() throws IOException {
    Directory dir = FSDirectory.open(new File("/tmp/index"));
    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(dir));
    Query q = new TermQuery(new Term("contents", "lucene"));
    TopDocs hits = searcher.search(q, 10);

}

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From source file:com.mathworks.xzheng.meetlucene.Searcher.java

License:Apache License

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

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

    QueryParser parser = new QueryParser(Version.LUCENE_46, // 4
            "contents", //4
            new StandardAnalyzer( //4
                    Version.LUCENE_46)); //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
    }/* w  w  w.  ja v a 2  s  .  c om*/

    is.getIndexReader().close(); //9
}

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From source file:com.mathworks.xzheng.searching.BasicSearchingTest.java

License:Apache License

public void testTerm() throws Exception {
    Directory dir = TestUtil.getBookIndexDirectory(); //A
    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(dir)); //B

    Term t = new Term("subject", "ant");
    Query query = new TermQuery(t);
    TopDocs docs = searcher.search(query, 10);
    assertEquals("Ant in Action", //C
            1, docs.totalHits); //C

    t = new Term("subject", "junit");
    docs = searcher.search(new TermQuery(t), 10);
    assertEquals("Ant in Action, " + //D
            "JUnit in Action, Second Edition", //D
            2, docs.totalHits); //D

    dir.close();/*w  w  w  .  jav  a 2  s.c o  m*/
}

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From source file:com.mathworks.xzheng.searching.BasicSearchingTest.java

License:Apache License

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

    Term t = new Term("isbn", "9781935182023");
    Query query = new TermQuery(t);
    TopDocs docs = searcher.search(query, 10);
    assertEquals("JUnit in Action, Second Edition", 1, docs.totalHits);

    dir.close();//  w  w  w  .  j a  va  2s .co  m
}

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From source file:com.mathworks.xzheng.searching.BasicSearchingTest.java

License:Apache License

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

    QueryParser parser = new QueryParser(Version.LUCENE_46, //A
            "contents", //A
            new SimpleAnalyzer(Version.LUCENE_46)); //A

    Query query = parser.parse("+JUNIT +ANT -MOCK"); //B
    TopDocs docs = searcher.search(query, 10);
    assertEquals(1, docs.totalHits);//from  www.  jav a 2  s. co m
    Document d = searcher.doc(docs.scoreDocs[0].doc);
    assertEquals("Ant in Action", d.get("title"));

    query = parser.parse("mock OR junit"); //B
    docs = searcher.search(query, 10);
    assertEquals("Ant in Action, " + "JUnit in Action, Second Edition", 2, docs.totalHits);

    dir.close();
}

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From source file:com.mathworks.xzheng.searching.BooleanQueryTest.java

License:Apache License

public void testAnd() throws Exception {
    TermQuery searchingBooks = new TermQuery(new Term("subject", "search")); //#1

    Query books2010 = //#2
            NumericRangeQuery.newIntRange("pubmonth", 201001, //#2
                    201012, //#2
                    true, true); //#2

    BooleanQuery searchingBooks2010 = new BooleanQuery(); //#3
    searchingBooks2010.add(searchingBooks, BooleanClause.Occur.MUST); //#3
    searchingBooks2010.add(books2010, BooleanClause.Occur.MUST); //#3

    Directory dir = TestUtil.getBookIndexDirectory();
    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(dir));
    TopDocs matches = searcher.search(searchingBooks2010, 10);

    assertTrue(TestUtil.hitsIncludeTitle(searcher, matches, "Lucene in Action, Second Edition"));

    dir.close();/*  w ww . ja  v  a2s.com*/
}

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From source file:com.mathworks.xzheng.searching.BooleanQueryTest.java

License:Apache License

public void testOr() throws Exception {
    TermQuery methodologyBooks = new TermQuery( // #1
            new Term("category", // #1
                    "/technology/computers/programming/methodology")); // #1

    TermQuery easternPhilosophyBooks = new TermQuery( // #2
            new Term("category", // #2
                    "/philosophy/eastern")); // #2

    BooleanQuery enlightenmentBooks = new BooleanQuery(); // #3
    enlightenmentBooks.add(methodologyBooks, // #3
            BooleanClause.Occur.SHOULD); // #3
    enlightenmentBooks.add(easternPhilosophyBooks, // #3
            BooleanClause.Occur.SHOULD); // #3

    Directory dir = TestUtil.getBookIndexDirectory();
    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(dir));
    TopDocs matches = searcher.search(enlightenmentBooks, 10);
    System.out.println("or = " + enlightenmentBooks);

    assertTrue(TestUtil.hitsIncludeTitle(searcher, matches, "Extreme Programming Explained"));
    assertTrue(TestUtil.hitsIncludeTitle(searcher, matches, "Tao Te Ching \u9053\u5FB7\u7D93"));

    dir.close();/*from  ww  w.j a v a  2 s.c o m*/
}

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From source file:com.mathworks.xzheng.searching.Explainer.java

License:Apache License

public static void main(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: Explainer <index dir> <query>");
        System.exit(1);/*from ww  w  . j a v  a 2  s. c o  m*/
    }

    String indexDir = args[0];
    String queryExpression = args[1];

    Directory directory = FSDirectory.open(new File(indexDir));
    QueryParser parser = new QueryParser(Version.LUCENE_46, "contents", new SimpleAnalyzer(Version.LUCENE_46));
    Query query = parser.parse(queryExpression);

    System.out.println("Query: " + queryExpression);

    IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(directory));
    TopDocs topDocs = searcher.search(query, 10);

    for (ScoreDoc match : topDocs.scoreDocs) {
        Explanation explanation = searcher.explain(query, match.doc); //#A

        System.out.println("----------");
        Document doc = searcher.doc(match.doc);
        System.out.println(doc.get("title"));
        System.out.println(explanation.toString()); //#B
    }

    directory.close();
}

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From source file:com.mathworks.xzheng.searching.NearRealTimeTest.java

License:Apache License

public void testNearRealTime() throws Exception {
    Directory dir = new RAMDirectory();

    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46,
            new StandardAnalyzer(Version.LUCENE_46));
    IndexWriter writer = new IndexWriter(dir, config);
    for (int i = 0; i < 10; i++) {
        Document doc = new Document();
        doc.add(new Field("id", "" + i, Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS));
        doc.add(new Field("text", "aaa", Field.Store.NO, Field.Index.ANALYZED));
        writer.addDocument(doc);//from w ww  . j a  v a  2 s.  c o m
    }
    IndexReader reader = DirectoryReader.open(writer.getDirectory()); // #1
    IndexSearcher searcher = new IndexSearcher(reader); // #A

    Query query = new TermQuery(new Term("text", "aaa"));
    TopDocs docs = searcher.search(query, 1);
    assertEquals(10, docs.totalHits); // #B

    writer.deleteDocuments(new Term("id", "7")); // #2

    Document doc = new Document(); // #3
    doc.add(new Field("id", // #3
            "11", // #3
            Field.Store.NO, // #3
            Field.Index.NOT_ANALYZED_NO_NORMS)); // #3
    doc.add(new Field("text", // #3
            "bbb", // #3
            Field.Store.NO, // #3
            Field.Index.ANALYZED)); // #3
    writer.addDocument(doc); // #3

    //IndexReader newReader = reader.reopen();                 // #4
    IndexReader newReader = DirectoryReader.open(writer.getDirectory()); // #4
    assertFalse(reader == newReader); // #5
    reader.close(); // #6
    searcher = new IndexSearcher(newReader);

    TopDocs hits = searcher.search(query, 10); // #7
    assertEquals(9, hits.totalHits); // #7

    query = new TermQuery(new Term("text", "bbb")); // #8
    hits = searcher.search(query, 1); // #8
    assertEquals(1, hits.totalHits); // #8

    newReader.close();
    writer.close();
}

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