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.leavesfly.lia.searching.QueryParserTest.java

License:Apache License

protected void setUp() throws Exception {
    analyzer = new WhitespaceAnalyzer();
    dir = TestUtil.getBookIndexDirectory();
    searcher = new IndexSearcher(dir);
}

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From source file:com.leavesfly.lia.searching.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);
    System.out.println(explanation);

    TopDocs matches = searcher.search(query, 10);
    assertEquals(1, matches.totalHits);/* w  w  w . j  a  va2 s .  c o m*/

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

    searcher.close();
}

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From source file:com.leavesfly.lia.searching.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);
    /*// w ww  .j  av  a  2s  .c o m
     * for(int i=0;i<matches.totalHits;i++) { System.out.println("match " +
     * i + ": " + searcher.doc(matches.scoreDocs[i].doc).get("title2")); }
     */
    assertEquals(3, matches.totalHits);
    searcher.close();
    dir.close();
}

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From source file:com.leavesfly.lia.tool.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 = IndexReader.open(directory);

    IndexSearcher searcher = new IndexSearcher(reader);

    int numDocs = reader.maxDoc();

    MoreLikeThis mlt = new MoreLikeThis(reader); // #A
    mlt.setFieldNames(new String[] { "title", "author" });
    mlt.setMinTermFreq(1); // #B
    mlt.setMinDocFreq(1);//from w w  w.  ja  v a2s . c om

    for (int docID = 0; docID < numDocs; docID++) { // #C
        System.out.println();
        Document doc = reader.document(docID);
        System.out.println(doc.get("title"));

        Query query = mlt.like(docID); // #D
        System.out.println("  query=" + query);

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

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

---

From source file:com.leavesfly.lia.tool.ChainedFilterTest.java

License:Apache License

public void setUp() throws Exception {
    directory = new RAMDirectory();
    IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(),
            IndexWriter.MaxFieldLength.UNLIMITED);

    Calendar cal = Calendar.getInstance();
    cal.set(2009, 1, 1, 0, 0); // A

    for (int i = 0; i < MAX; i++) {
        Document doc = new Document();
        doc.add(new Field("key", "" + (i + 1), Field.Store.YES, Field.Index.NOT_ANALYZED));
        doc.add(new Field("owner", (i < MAX / 2) ? "bob" : "sue", Field.Store.YES, Field.Index.NOT_ANALYZED));
        doc.add(new Field("date", DateTools.timeToString(cal.getTimeInMillis(), DateTools.Resolution.DAY),
                Field.Store.YES, Field.Index.NOT_ANALYZED));
        writer.addDocument(doc);//from w ww.  j  a v a  2s  .  co m

        cal.add(Calendar.DATE, 1);
    }

    writer.close();

    searcher = new IndexSearcher(directory);

    BooleanQuery bq = new BooleanQuery(); // B
    bq.add(new TermQuery(new Term("owner", "bob")), // B
            BooleanClause.Occur.SHOULD); // B
    bq.add(new TermQuery(new Term("owner", "sue")), // B
            BooleanClause.Occur.SHOULD); // B
    query = bq;

    cal.set(2099, 1, 1, 0, 0);
    dateFilter = TermRangeFilter.Less("date", // C
            DateTools.timeToString( // C
                    cal.getTimeInMillis(), // C
                    DateTools.Resolution.DAY));// C

    bobFilter = new CachingWrapperFilter( // D
            new QueryWrapperFilter( // D
                    new TermQuery(new Term("owner", "bob")))); // D

    sueFilter = new CachingWrapperFilter( // E
            new QueryWrapperFilter( // E
                    new TermQuery(new Term("owner", "sue")))); // E
}

---

From source file:com.leavesfly.lia.tool.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);// www  .  ja  v a 2 s. c o m
        String fragment = highlighter.getBestFragment(stream, title);

        System.out.println(fragment);
    }
}

---

From source file:com.leavesfly.lia.tool.SpatialLuceneExample.java

License:Apache License

public void findNear(String what, double latitude, double longitude, double radius)
        throws CorruptIndexException, IOException {
    IndexSearcher searcher = new IndexSearcher(directory);

    DistanceQueryBuilder dq;// w  ww . j  a  v  a2 s .  c  o  m
    dq = new DistanceQueryBuilder(latitude, // #A
            longitude, // #A
            radius, // #A
            latField, // #A
            lngField, // #A
            tierPrefix, // #A
            true); // #A

    Query tq;
    if (what == null)
        tq = new TermQuery(new Term("metafile", "doc")); // #B
    else
        tq = new TermQuery(new Term("name", what));

    DistanceFieldComparatorSource dsort; // #C
    dsort = new DistanceFieldComparatorSource( // #C
            dq.getDistanceFilter()); // #C
    Sort sort = new Sort(new SortField("foo", dsort)); // #C

    TopDocs hits = searcher.search(tq, dq.getFilter(), 10, sort);

    Map<Integer, Double> distances = // #D
            dq.getDistanceFilter().getDistances(); // #D

    System.out.println("Number of results: " + hits.totalHits);
    System.out.println("Found:");
    for (ScoreDoc sd : hits.scoreDocs) {
        int docID = sd.doc;
        Document d = searcher.doc(docID);

        String name = d.get("name");
        double rsLat = NumericUtils.prefixCodedToDouble(d.get(latField));
        double rsLng = NumericUtils.prefixCodedToDouble(d.get(lngField));
        Double geo_distance = distances.get(docID);

        System.out.printf(name + ": %.2f Miles\n", geo_distance);
        System.out.println("\t\t(" + rsLat + "," + rsLng + ")");
    }
}

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From source file:com.liang.minisearch.domain.search.Engine.java

public List<QueryDocument> search(String queryString) throws ParseException, IOException {
    List<QueryDocument> results = new ArrayList<>();

    IndexSearcher searcher = new IndexSearcher(this.getReader());

    // Parse user input query
    Query query = new QueryParser(FIELD_CONTENT, new StandardAnalyzer()).parse(queryString);

    // Get top n matching documents
    TopDocs topDocs = searcher.search(query, NUM_TOP_RESULT);
    ScoreDoc[] hits = topDocs.scoreDocs;
    for (ScoreDoc hit : hits) {
        Document doc = searcher.doc(hit.doc);
        QueryDocument result = new QueryDocument();
        result.setUrl(doc.get(FIELD_URL));
        result.setScore(hit.score);//w w w .j  av a  2 s  .c  om

        results.add(result);
    }

    return results;
}

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From source file:com.liferay.portal.search.lucene.dump.DumpIndexDeletionPolicyTest.java

License:Open Source License

private void _assertHits(Directory directory, String fieldName, String fieldValue, int totalHits)
        throws Exception {

    IndexSearcher indexSearcher = new IndexSearcher(directory);

    Term term = new Term(fieldName, fieldValue);

    TermQuery termQuery = new TermQuery(term);

    TopDocs topDocs = indexSearcher.search(termQuery, 1);

    assertEquals(totalHits, topDocs.totalHits);
}

---

From source file:com.liferay.portal.search.lucene.dump.IndexAccessorImplTest.java

License:Open Source License

private void _assertHits(String key, boolean expectHit) throws Exception {
    IndexSearcher indexSearcher = new IndexSearcher(_indexAccessorImpl.getLuceneDir());

    for (int i = 0; i < _documentsCount * 2; i++) {
        Term term = new Term("name", key + i);

        TermQuery termQuery = new TermQuery(term);

        TopDocs topDocs = indexSearcher.search(termQuery, 1);

        if (i < _documentsCount) {
            if (expectHit) {
                assertEquals(1, topDocs.totalHits);
            } else {
                assertEquals(0, topDocs.totalHits);
            }/*from w  w  w .ja  v  a 2 s  . c  o m*/
        } else {
            assertEquals(0, topDocs.totalHits);
        }
    }

    indexSearcher.close();
}

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