Examples of org.apache.lucene.search.WildcardQuery

org.apache.lucene.search.WildcardQuery
Implements the wildcard search query. Supported wildcards are *, which matches any character sequence (including the empty one), and ?, which matches any single character. Note this query can be slow, as it needs to iterate over many terms. In order to prevent extremely slow WildcardQueries, a Wildcard term should not start with one of the wildcards * or ?.
This query uses the {@link MultiTermQuery#CONSTANT_SCORE_AUTO_REWRITE_DEFAULT}rewrite method. @see WildcardTermEnum

         final ValueFactoryImpl valueFactory = new ValueFactoryImpl(new LocationFactory(nsReg));
         BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE);
         BooleanQuery query = new BooleanQuery();


         final String prefix = nsReg.getNamespacePrefixByURI(uri);
         query.add(new WildcardQuery(new Term(FieldNames.LABEL, prefix + ":*")), Occur.SHOULD);
         // name of the property
         query.add(new WildcardQuery(new Term(FieldNames.PROPERTIES_SET, prefix + ":*")), Occur.SHOULD);


         result = getNodes(query);


         // value of the property


         try
         {
            final Set<String> props = getFieldNames();


            query = new BooleanQuery();
            for (final String fieldName : props)
            {
               if (!FieldNames.PROPERTIES_SET.equals(fieldName))
               {
                  query.add(new WildcardQuery(new Term(fieldName, "*" + prefix + ":*")), Occur.SHOULD);
               }
            }
         }
         catch (final IndexException e)
         {

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  private int countDocsWithClass() throws IOException {
    int docCount = MultiFields.getTerms(this.atomicReader, this.classFieldName).getDocCount();
    if (docCount == -1) { // in case codec doesn't support getDocCount
      TotalHitCountCollector totalHitCountCollector = new TotalHitCountCollector();
      BooleanQuery q = new BooleanQuery();
      q.add(new BooleanClause(new WildcardQuery(new Term(classFieldName, String.valueOf(WildcardQuery.WILDCARD_STRING))), BooleanClause.Occur.MUST));
      if (query != null) {
        q.add(query, BooleanClause.Occur.MUST);
      }
      indexSearcher.search(q,
          totalHitCountCollector);

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    }
    BooleanQuery mltQuery = new BooleanQuery();
    for (String textFieldName : textFieldNames) {
      mltQuery.add(new BooleanClause(mlt.like(new StringReader(text), textFieldName), BooleanClause.Occur.SHOULD));
    }
    Query classFieldQuery = new WildcardQuery(new Term(classFieldName, "*"));
    mltQuery.add(new BooleanClause(classFieldQuery, BooleanClause.Occur.MUST));
    if (query != null) {
      mltQuery.add(query, BooleanClause.Occur.MUST);
    }
    TopDocs topDocs = indexSearcher.search(mltQuery, k);

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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    Query query = new WildcardQuery(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 WildcardQuery(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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      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    BooleanQuery query = new BooleanQuery();
    query.add(new WildcardQuery(new Term("body", "te*")), BooleanClause.Occur.SHOULD);
    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]);
    
    // must not
    query = new BooleanQuery();
    query.add(new MatchAllDocsQuery(), BooleanClause.Occur.SHOULD);
    query.add(new WildcardQuery(new Term("bogus", "te*")), BooleanClause.Occur.MUST_NOT);
    topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    snippets = highlighter.highlight("body", query, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a test.", snippets[0]);

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      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    DisjunctionMaxQuery query = new DisjunctionMaxQuery(0);
    query.add(new WildcardQuery(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]);

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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    Query query = new SpanMultiTermQueryWrapper<WildcardQuery>(new WildcardQuery(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]);

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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    SpanQuery childQuery = new SpanMultiTermQueryWrapper<WildcardQuery>(new WildcardQuery(new Term("body", "te*")));
    Query query = new SpanOrQuery(new SpanQuery[] { childQuery });
    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);

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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    SpanQuery childQuery = new SpanMultiTermQueryWrapper<WildcardQuery>(new WildcardQuery(new Term("body", "te*")));
    Query query = new SpanNearQuery(new SpanQuery[] { childQuery }, 0, true);
    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);

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      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    SpanQuery include = new SpanMultiTermQueryWrapper<WildcardQuery>(new WildcardQuery(new Term("body", "te*")));
    SpanQuery exclude = new SpanTermQuery(new Term("body", "bogus"));
    Query query = new SpanNotQuery(include, exclude);
    TopDocs topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs);

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