Examples of org.apache.lucene.search.Query

org.apache.lucene.search.Query
The abstract base class for queries.
Instantiable subclasses are:
- {@link TermQuery}
- {@link MultiTermQuery}
- {@link BooleanQuery}
- {@link WildcardQuery}
- {@link PhraseQuery}
- {@link PrefixQuery}
- {@link MultiPhraseQuery}
- {@link FuzzyQuery}
- {@link TermRangeQuery}
- {@link NumericRangeQuery}
- {@link org.apache.lucene.search.spans.SpanQuery}
A parser for queries is contained in:
- {@link org.apache.lucene.queryParser.QueryParser QueryParser}

  }


  //Helper method to query
  private int search(Analyzer a, String queryString) throws IOException, ParseException {
    QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, "repetitiveField", a);
    Query q = qp.parse(queryString);
    return new IndexSearcher(reader).search(q, null, 1000).totalHits;
  }

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    return parser.parse(query, "field");
  }


  public void assertQueryEquals(String query, Analyzer a, String result)
      throws Exception {
    Query q = getQuery(query, a);
    String s = q.toString("field");
    if (!s.equals(result)) {
      fail("Query /" + query + "/ yielded /" + s + "/, expecting /" + result
          + "/");
    }
  }

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    }
  }


  public void assertQueryEqualsAllowLeadingWildcard(String query, Analyzer a, String result)
      throws Exception {
    Query q = getQueryAllowLeadingWildcard(query, a);
    String s = q.toString("field");
    if (!s.equals(result)) {
      fail("Query /" + query + "/ yielded /" + s + "/, expecting /" + result
          + "/");
    }
  }

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    }
  }


  public void assertQueryEquals(StandardQueryParser qp, String field,
      String query, String result) throws Exception {
    Query q = qp.parse(query, field);
    String s = q.toString(field);
    if (!s.equals(result)) {
      fail("Query /" + query + "/ yielded /" + s + "/, expecting /" + result
          + "/");
    }
  }

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  public void assertWildcardQueryEquals(String query, boolean lowercase,
      String result, boolean allowLeadingWildcard) throws Exception {
    StandardQueryParser qp = getParser(null);
    qp.setLowercaseExpandedTerms(lowercase);
    qp.setAllowLeadingWildcard(allowLeadingWildcard);
    Query q = qp.parse(query, "field");
    String s = q.toString("field");
    if (!s.equals(result)) {
      fail("WildcardQuery /" + query + "/ yielded /" + s + "/, expecting /"
          + result + "/");
    }
  }

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  }


  public void assertWildcardQueryEquals(String query, String result)
      throws Exception {
    StandardQueryParser qp = getParser(null);
    Query q = qp.parse(query, "field");
    String s = q.toString("field");
    if (!s.equals(result)) {
      fail("WildcardQuery /" + query + "/ yielded /" + s + "/, expecting /"
          + result + "/");
    }
  }

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  }


  public void assertQueryEqualsDOA(String query, Analyzer a, String result)
      throws Exception {
    Query q = getQueryDOA(query, a);
    String s = q.toString("field");
    if (!s.equals(result)) {
      fail("Query /" + query + "/ yielded /" + s + "/, expecting /" + result
          + "/");
    }
  }

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    }
  }


  public void testConstantScoreAutoRewrite() throws Exception {
    StandardQueryParser qp = new StandardQueryParser(new WhitespaceAnalyzer());
    Query q = qp.parse("foo*bar", "field");
    assertTrue(q instanceof WildcardQuery);
    assertEquals(MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT, ((MultiTermQuery) q).getRewriteMethod());


    q = qp.parse("foo*", "field");
    assertTrue(q instanceof PrefixQuery);

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  public void testBoost() throws Exception {
    StandardAnalyzer oneStopAnalyzer = new StandardAnalyzer(Version.LUCENE_CURRENT, Collections.singleton("on"));
    StandardQueryParser qp = new StandardQueryParser();
    qp.setAnalyzer(oneStopAnalyzer);


    Query q = qp.parse("on^1.0", "field");
    assertNotNull(q);
    q = qp.parse("\"hello\"^2.0", "field");
    assertNotNull(q);
    assertEquals(q.getBoost(), (float) 2.0, (float) 0.5);
    q = qp.parse("hello^2.0", "field");
    assertNotNull(q);
    assertEquals(q.getBoost(), (float) 2.0, (float) 0.5);
    q = qp.parse("\"on\"^1.0", "field");
    assertNotNull(q);


    StandardQueryParser qp2 = new StandardQueryParser();
    qp2.setAnalyzer(new StandardAnalyzer(org.apache.lucene.util.Version.LUCENE_CURRENT));


    q = qp2.parse("the^3", "field");
    // "the" is a stop word so the result is an empty query:
    assertNotNull(q);
    assertEquals("", q.toString());
    assertEquals(1.0f, q.getBoost(), 0.01f);
  }

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   */
  public void testPrecedence() throws Exception {
    StandardQueryParser qp = new StandardQueryParser();
    qp.setAnalyzer(new WhitespaceAnalyzer());


    Query query1 = qp.parse("A AND B OR C AND D", "field");
    Query query2 = qp.parse("+A +B +C +D", "field");


    assertEquals(query1, query2);
  }

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