Examples of org.apache.lucene.index.IndexReader.document()

Class org.apache.lucene.index.IndexReader

Examples of org.apache.lucene.index.IndexReader.document()

org.apache.lucene.index.IndexReader.document()
Returns the stored fields of the n^th Document in this index.
NOTE: for performance reasons, this method does not check if the requested document is deleted, and therefore asking for a deleted document may yield unspecified results. Usually this is not required, however you can call {@link #isDeleted(int)} with the requested document ID to verifythe document is not deleted. @throws CorruptIndexException if the index is corrupt @throws IOException if there is a low-level IO error

      query.add(new Term("field", "universe"));
      query.add(new Term("field", "right"));
      query.setLowFreqMinimumNumberShouldMatch(0.49f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      assertEquals("2", r.document(search.scoreDocs[1].doc).get("id"));
      assertEquals("3", r.document(search.scoreDocs[2].doc).get("id"));
    }
    
    {

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      query.add(new Term("field", "right"));
      query.setLowFreqMinimumNumberShouldMatch(0.49f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      assertEquals("2", r.document(search.scoreDocs[1].doc).get("id"));
      assertEquals("3", r.document(search.scoreDocs[2].doc).get("id"));
    }
    
    {
      CommonTermsQuery query = new CommonTermsQuery(Occur.SHOULD, Occur.SHOULD,

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      query.setLowFreqMinimumNumberShouldMatch(0.49f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      assertEquals("2", r.document(search.scoreDocs[1].doc).get("id"));
      assertEquals("3", r.document(search.scoreDocs[2].doc).get("id"));
    }
    
    {
      CommonTermsQuery query = new CommonTermsQuery(Occur.SHOULD, Occur.SHOULD,
          random().nextBoolean() ? 2.0f : 0.5f);

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      query.add(new Term("field", "universe"));
      query.add(new Term("field", "right"));
      query.setLowFreqMinimumNumberShouldMatch(1.0f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      assertEquals("2", r.document(search.scoreDocs[1].doc).get("id"));
      assertEquals("3", r.document(search.scoreDocs[2].doc).get("id"));
      assertTrue(search.scoreDocs[1].score > search.scoreDocs[2].score);
    }

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      query.add(new Term("field", "right"));
      query.setLowFreqMinimumNumberShouldMatch(1.0f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      assertEquals("2", r.document(search.scoreDocs[1].doc).get("id"));
      assertEquals("3", r.document(search.scoreDocs[2].doc).get("id"));
      assertTrue(search.scoreDocs[1].score > search.scoreDocs[2].score);
    }
    
    {

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      query.setLowFreqMinimumNumberShouldMatch(1.0f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      assertEquals("2", r.document(search.scoreDocs[1].doc).get("id"));
      assertEquals("3", r.document(search.scoreDocs[2].doc).get("id"));
      assertTrue(search.scoreDocs[1].score > search.scoreDocs[2].score);
    }
    
    {
      CommonTermsQuery query = new CommonTermsQuery(Occur.SHOULD, Occur.SHOULD,

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      query.setLowFreqMinimumNumberShouldMatch(1.0f);
      query.setHighFreqMinimumNumberShouldMatch(4.0f);
      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 3);
      assertEquals(search.scoreDocs[1].score, search.scoreDocs[2].score, 0.0f);
      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      // doc 2 and 3 only get a score from low freq terms
      assertEquals(
          new HashSet<String>(Arrays.asList("2", "3")),
          new HashSet<String>(Arrays.asList(
              r.document(search.scoreDocs[1].doc).get("id"),

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      assertEquals("0", r.document(search.scoreDocs[0].doc).get("id"));
      // doc 2 and 3 only get a score from low freq terms
      assertEquals(
          new HashSet<String>(Arrays.asList("2", "3")),
          new HashSet<String>(Arrays.asList(
              r.document(search.scoreDocs[1].doc).get("id"),
              r.document(search.scoreDocs[2].doc).get("id"))));
    }
    
    {
      // only high freq terms around - check that min should match is applied

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      // doc 2 and 3 only get a score from low freq terms
      assertEquals(
          new HashSet<String>(Arrays.asList("2", "3")),
          new HashSet<String>(Arrays.asList(
              r.document(search.scoreDocs[1].doc).get("id"),
              r.document(search.scoreDocs[2].doc).get("id"))));
    }
    
    {
      // only high freq terms around - check that min should match is applied
      CommonTermsQuery query = new CommonTermsQuery(Occur.SHOULD, Occur.SHOULD,

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      TopDocs search = s.search(query, 10);
      assertEquals(search.totalHits, 2);
      assertEquals(
          new HashSet<String>(Arrays.asList("0", "2")),
          new HashSet<String>(Arrays.asList(
              r.document(search.scoreDocs[0].doc).get("id"),
              r.document(search.scoreDocs[1].doc).get("id"))));
    }
    r.close();
    w.close();
    dir.close();

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