Package org.apache.lucene.search

Examples of org.apache.lucene.search.PrefixQuery

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    defgMultiTermQueryTest(new WildcardQuery(new Term(F, "d*g")));
  }

  public void testPrefixQuery() throws Exception {
    makeIndexStrMV();
    defgMultiTermQueryTest(new PrefixQuery(new Term(F, "de")));
  }
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    assertEquals(expectedBoolean, parse("\"foo bar\"~12 baz"));
  }

  /** test a simple prefix */
  public void testPrefix() throws Exception {
    PrefixQuery expected = new PrefixQuery(new Term("field", "foobar"));

    assertEquals(expected, parse("foobar*"));
  }
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    assertEquals(expected, parse("---foo"));
  }

  /** test crazy prefixes with multiple asterisks */
  public void testCrazyPrefixes1() throws Exception {
    Query expected = new PrefixQuery(new Term("field", "st*ar"));

    assertEquals(expected, parse("st*ar*"));
  }
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    assertEquals(expected, parse("st*ar*"));
  }

  /** test prefixes with some escaping */
  public void testCrazyPrefixes2() throws Exception {
    Query expected = new PrefixQuery(new Term("field", "st*ar\\*"));

    assertEquals(expected, parse("st*ar\\\\**"));
  }
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   * Factory method to generate a prefix query.
   */
  protected Query newPrefixQuery(String text) {
    BooleanQuery bq = new BooleanQuery(true);
    for (Map.Entry<String,Float> entry : weights.entrySet()) {
      PrefixQuery prefix = new PrefixQuery(new Term(entry.getKey(), text));
      prefix.setBoost(entry.getValue());
      bq.add(prefix, BooleanClause.Occur.SHOULD);
    }
    return simplify(bq);
  }
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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    Query query = new PrefixQuery(new Term("body", "te"));
    TopDocs topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a <b>test</b>.", snippets[0]);
    assertEquals("<b>Test</b> a one sentence document.", snippets[1]);
   
    // wrong field
    BooleanQuery bq = new BooleanQuery();
    bq.add(new MatchAllDocsQuery(), BooleanClause.Occur.SHOULD);
    bq.add(new PrefixQuery(new Term("bogus", "te")), BooleanClause.Occur.SHOULD);
    topDocs = searcher.search(bq, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    snippets = highlighter.highlight("body", bq, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a test.", snippets[0]);
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        writer.addDocument(doc);
      }
      writer.close();
     
      IndexReader reader = IndexReader.open(directory);
      PrefixQuery query = new PrefixQuery(new Term("category", "foo"));
     
      rw1 = query.rewrite(reader);
     
      BooleanQuery bq = new BooleanQuery();
      bq.add(query, BooleanClause.Occur.MUST);
     
      rw2 = bq.rewrite(reader);
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  {
    if (lowercaseExpandedTerms) {
      termStr = termStr.toLowerCase();
    }
    Term t = new Term(field, termStr);
    return new PrefixQuery(t);
  }
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   * Builds a new PrefixQuery instance
   * @param prefix Prefix term
   * @return new PrefixQuery instance
   */
  protected Query newPrefixQuery(Term prefix){
    return new PrefixQuery(prefix);
  }
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        writer.addDocument(doc);
      }
      writer.close();
     
      IndexReader reader = IndexReader.open(directory);
      PrefixQuery query = new PrefixQuery(new Term("category", "foo"));
     
      rw1 = query.rewrite(reader);
     
      BooleanQuery bq = new BooleanQuery();
      bq.add(query, true, false);
     
      rw2 = bq.rewrite(reader);
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