Examples of org.apache.lucene.search.PhraseQuery

org.apache.lucene.search.PhraseQuery
A Query that matches documents containing a particular sequence of terms. A PhraseQuery is built by QueryParser for input like "new york".
This query may be combined with other terms or queries with a {@link BooleanQuery}.

    checkHits(query, new int[] {});
  }


  @Test
  public void testPhrase() throws Exception {
    PhraseQuery query = new PhraseQuery();
    query.add(new Term("field", "seventy"));
    query.add(new Term("field", "seven"));
    checkHits(query, new int[]
      {77, 177, 277, 377, 477, 577, 677, 777, 877,
              977, 1077, 1177, 1277, 1377, 1477, 1577, 1677, 1777, 1877, 1977});
  }

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              977, 1077, 1177, 1277, 1377, 1477, 1577, 1677, 1777, 1877, 1977});
  }


  @Test
  public void testPhrase2() throws Exception {
    PhraseQuery query = new PhraseQuery();
    query.add(new Term("field", "seventish"));
    query.add(new Term("field", "sevenon"));
    checkHits(query, new int[] {});
  }

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      this.searcher = newSearcher(reader);
    }
    
    private ScoreDoc[] search() throws IOException {
        // create PhraseQuery "term1 term2" and search
        PhraseQuery pq = new PhraseQuery();
        pq.add(new Term(this.field, this.term1));
        pq.add(new Term(this.field, this.term2));
        return this.searcher.search(pq, null, 1000).scoreDocs;        
    }

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    document.add(body);
    iw.addDocument(document);
    IndexReader ir = iw.getReader();
    iw.close();
    IndexSearcher searcher = newSearcher(ir);
    PhraseQuery query = new PhraseQuery();
    query.add(new Term("body", "buddhist"));
    query.add(new Term("body", "origins"));
    TopDocs topDocs = searcher.search(query, 10);
    assertEquals(1, topDocs.totalHits);
    PostingsHighlighter highlighter = new PostingsHighlighter();
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs, 2);
    assertEquals(1, snippets.length);

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    document.add(body);
    iw.addDocument(document);
    IndexReader ir = iw.getReader();
    iw.close();
    IndexSearcher searcher = newSearcher(ir);
    PhraseQuery query = new PhraseQuery();
    query.add(new Term("body", "curious"));
    query.add(new Term("body", "george"));
    TopDocs topDocs = searcher.search(query, 10);
    assertEquals(1, topDocs.totalHits);
    PostingsHighlighter highlighter = new PostingsHighlighter();
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs, 2);
    assertEquals(1, snippets.length);

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  public void testCJKSloppyPhrase() throws Exception {
    // individual CJK chars as terms
    SimpleCJKAnalyzer analyzer = new SimpleCJKAnalyzer(); 
    
    PhraseQuery expected = new PhraseQuery();
    expected.setSlop(3);
    expected.add(new Term("field", "中"));
    expected.add(new Term("field", "国"));
    
    assertEquals(expected, getQuery("\"中国\"~3", analyzer));
  }

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    qp.setEnablePositionIncrements(true);


    String qtxt = "\"the words in poisitions pos02578 are stopped in this phrasequery\"";
    // 0 2 5 7 8
    int expectedPositions[] = { 1, 3, 4, 6, 9 };
    PhraseQuery pq = (PhraseQuery) qp.parse(qtxt, "a");
    // System.out.println("Query text: "+qtxt);
    // System.out.println("Result: "+pq);
    Term t[] = pq.getTerms();
    int pos[] = pq.getPositions();
    for (int i = 0; i < t.length; i++) {
      // System.out.println(i+". "+t[i]+"  pos: "+pos[i]);
      assertEquals("term " + i + " = " + t[i] + " has wrong term-position!",
          expectedPositions[i], pos[i]);
    }

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    MockAnalyzer mockAnalyzer = new MockAnalyzer(random());
    mindex.addField("field", "the quick brown fox", mockAnalyzer);
    mindex.addField("field", "jumps over the", mockAnalyzer);
    AtomicReader reader = (AtomicReader) mindex.createSearcher().getIndexReader();
    assertEquals(7, reader.terms("field").getSumTotalTermFreq());
    PhraseQuery query = new PhraseQuery();
    query.add(new Term("field", "fox"));
    query.add(new Term("field", "jumps"));
    assertTrue(mindex.search(query) > 0.1);
    mindex.reset();
    mockAnalyzer.setPositionIncrementGap(1 + random().nextInt(10));
    mindex.addField("field", "the quick brown fox", mockAnalyzer);
    mindex.addField("field", "jumps over the", mockAnalyzer);
    assertEquals(0, mindex.search(query), 0.00001f);
    query.setSlop(10);
    assertTrue("posGap" + mockAnalyzer.getPositionIncrementGap("field") , mindex.search(query) > 0.0001);
  }

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  public void testCJKPhrase() throws Exception {
    // individual CJK chars as terms
    SimpleCJKAnalyzer analyzer = new SimpleCJKAnalyzer();
    
    PhraseQuery expected = new PhraseQuery();
    expected.add(new Term("field", "中"));
    expected.add(new Term("field", "国"));
    
    assertEquals(expected, getQuery("\"中国\"", analyzer));
  }

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  public void testCJKBoostedPhrase() throws Exception {
    // individual CJK chars as terms
    SimpleCJKAnalyzer analyzer = new SimpleCJKAnalyzer();
    
    PhraseQuery expected = new PhraseQuery();
    expected.setBoost(0.5f);
    expected.add(new Term("field", "中"));
    expected.add(new Term("field", "国"));
    
    assertEquals(expected, getQuery("\"中国\"^0.5", analyzer));
  }

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