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.knowledgebooks.rdf.implementation.LuceneRdfManager.java

License:Open Source License

/**
 * @param search_query//  w  w  w  . ja v  a  2s  .  co m
 * @return
 * @throws org.apache.lucene.queryParser.ParseException
 *
 * @throws java.io.IOException
 */
public List<List<String>> searchIndex(String search_query) throws ParseException, IOException {
    File index_dir = new File(data_store_file_root + "/lucene_index");
    reader = IndexReader.open(FSDirectory.open(index_dir), true);
    List<List<String>> ret = new ArrayList<List<String>>();
    Searcher searcher = new IndexSearcher(reader);

    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_CURRENT);
    QueryParser parser = new QueryParser(Version.LUCENE_CURRENT, "object", analyzer);
    Query query = parser.parse(search_query);

    TopScoreDocCollector collector = TopScoreDocCollector.create(10, false);
    searcher.search(query, collector);
    ScoreDoc[] hits = collector.topDocs().scoreDocs;

    for (int i = 0; i < hits.length; i += 1) {
        Document doc = searcher.doc(hits[i].doc);
        List<String> as2 = new ArrayList<String>(23);
        as2.add(doc.get("subject"));
        as2.add(doc.get("predicate"));
        as2.add(doc.get("object"));
        ret.add(as2);
    }
    reader.close();
    return ret;
}

From source file:com.knowledgetree.indexer.IndexerManager.java

/**
 * Closes any existing readers and reopens them.
 * @throws Exception/*www .  j a  v a2s  .c o m*/
 */
private void reopenIndex() throws Exception {
    this.logger.debug("Reopenning index");
    WriteLock lock = this.locker.writeLock();
    lock.lock();
    try {
        if (null != this.queryReader) {
            this.querySearcher.close();
            this.queryReader.close();
        }
        this.queryReader = IndexReader.open(this.indexDirectory);
        this.querySearcher = new IndexSearcher(this.queryReader);
        this.logger.debug("Timestamp: " + new Date());
        this.logger.debug("Documents in index: " + this.queryReader.numDocs());
    } finally {
        lock.unlock();
    }
}

From source file:com.knowledgetree.indexer.IndexerManager.java

/**
 * Optimise the lucene database.//from  w w  w  . jav a2 s . c o m
 * @throws Exception
 */
public void optimise() throws Exception {
    synchronized (this) {
        this.optimiseCount++;
    }

    this.logger.debug("Optimise index");
    WriteLock lock = this.locker.writeLock();
    lock.lock();
    try {
        if (null != this.queryReader) {
            this.querySearcher.close();
            this.queryReader.close();
        }

        IndexWriter writer = new IndexWriter(this.indexDirectory, this.analyzer, false);
        writer.optimize();
        writer.close();

        this.queryReader = IndexReader.open(this.indexDirectory);
        this.querySearcher = new IndexSearcher(this.queryReader);
    } finally {
        lock.unlock();
    }
}

From source file:com.krawler.luceneSearchService.LuceneSearchImpl.java

License:Open Source License

@Override
public Hits searchIndexWithSort(String query, String[] Field, String indexPath, Sort sort)
        throws KWLuceneException {
    Hits result = null;// w w  w .  ja va 2  s  .c  o  m
    try {
        IndexSearcher searcher = new IndexSearcher(indexPath);
        MultiFieldQueryParser multiparser = new MultiFieldQueryParser(Field, this.KWLAnalyzer);
        multiparser.setAllowLeadingWildcard(true);
        multiparser.setDefaultOperator(QueryParser.Operator.OR);
        Query lucenequery = multiparser.parse(query);
        if (sort == null) {
            result = searcher.search(lucenequery);
        } else {
            result = searcher.search(lucenequery, sort);
        }
    } catch (Exception ex) {
        throw new KWLuceneException("searchIndexWithSort: " + ex.toString(), ex);
    }
    return result;
}

From source file:com.leavesfly.lia.admin.SearcherManager.java

License:Apache License

public SearcherManager(Directory dir) throws IOException { //1
    currentSearcher = new IndexSearcher(IndexReader.open(dir)); //B
    warm(currentSearcher);/*from   ww w  . j  a  v  a2 s .co  m*/
}

From source file:com.leavesfly.lia.admin.SearcherManager.java

License:Apache License

public SearcherManager(IndexWriter writer) throws IOException { //2
    this.writer = writer;
    currentSearcher = new IndexSearcher(writer.getReader()); //C
    warm(currentSearcher);/*from   w  w w  .  ja va 2 s. co  m*/

    writer.setMergedSegmentWarmer( // 3
            new IndexWriter.IndexReaderWarmer() { // 3
                public void warm(IndexReader reader) throws IOException { // 3
                    SearcherManager.this.warm(new IndexSearcher(reader)); // 3
                } // 3
            }); // 3
}

From source file:com.leavesfly.lia.admin.SearcherManager.java

License:Apache License

public void maybeReopen() //E
        throws InterruptedException, //E
        IOException { //E

    startReopen();//from  w  ww .j  a v a  2  s  .c o  m

    try {
        final IndexSearcher searcher = get();
        try {
            IndexReader newReader = currentSearcher.getIndexReader().reopen();
            if (newReader != currentSearcher.getIndexReader()) {
                IndexSearcher newSearcher = new IndexSearcher(newReader);
                if (writer == null) {
                    warm(newSearcher);
                }
                swapSearcher(newSearcher);
            }
        } finally {
            release(searcher);
        }
    } finally {
        doneReopen();
    }
}

From source file:com.leavesfly.lia.advsearching.FilterTest.java

License:Apache License

protected void setUp() throws Exception { // #1
    allBooks = new MatchAllDocsQuery();
    dir = TestUtil.getBookIndexDirectory();
    searcher = new IndexSearcher(dir);
}

From source file:com.leavesfly.lia.advsearching.FunctionQueryTest.java

License:Apache License

public void testRecency() throws Throwable {
    Directory dir = TestUtil.getBookIndexDirectory();
    IndexReader r = IndexReader.open(dir);
    IndexSearcher s = new IndexSearcher(r);
    s.setDefaultFieldSortScoring(true, true);

    QueryParser parser = new QueryParser(Version.LUCENE_30, "contents",
            new StandardAnalyzer(Version.LUCENE_30));
    Query q = parser.parse("java in action"); // #A
    Query q2 = new RecencyBoostingQuery(q, // #B
            2.0, 2 * 365, "pubmonthAsDay");
    Sort sort = new Sort(new SortField[] { SortField.FIELD_SCORE, new SortField("title2", SortField.STRING) });
    TopDocs hits = s.search(q2, null, 5, sort);

    for (int i = 0; i < hits.scoreDocs.length; i++) {
        Document doc = r.document(hits.scoreDocs[i].doc);
        System.out.println((1 + i) + ": " + doc.get("title") + ": pubmonth=" + doc.get("pubmonth") + " score="
                + hits.scoreDocs[i].score);
    }/*from w  ww  .  j a  v  a2 s .  c  o  m*/
    s.close();
    r.close();
    dir.close();
}

From source file:com.leavesfly.lia.advsearching.MultiPhraseQueryTest.java

License:Apache License

protected void setUp() throws Exception {
    Directory directory = new RAMDirectory();
    IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(),
            IndexWriter.MaxFieldLength.UNLIMITED);
    Document doc1 = new Document();
    doc1.add(new Field("field", "the quick brown fox jumped over the lazy dog", Field.Store.YES,
            Field.Index.ANALYZED));
    writer.addDocument(doc1);//from w w  w .jav  a  2  s  .c o  m
    Document doc2 = new Document();
    doc2.add(new Field("field", "the fast fox hopped over the hound", Field.Store.YES, Field.Index.ANALYZED));
    writer.addDocument(doc2);
    writer.close();

    searcher = new IndexSearcher(directory);
}