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

                    } else {
                        qs.add(new PrefixQuery(new Term(name, first)));
                    }
                } else {
                    if (JCR_PATH.equals(name)) {
                        qs.add(new WildcardQuery(newPathTerm(first)));
                    } else {
                        qs.add(new WildcardQuery(new Term(name, first)));
                    }
                }
                continue;
            }

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                    break;
                }
            }


            if (hasFulltextToken) {
                return new WildcardQuery(newFulltextTerm(text));
            } else {
                return new TermQuery(newFulltextTerm(text));
            }
        } else {
            PhraseQuery pq = new PhraseQuery();

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                    } else {
                        qs.add(new PrefixQuery(new Term(name, first)));
                    }
                } else {
                    if (JCR_PATH.equals(name)) {
                        qs.add(new WildcardQuery(newPathTerm(first)));
                    } else {
                        qs.add(new WildcardQuery(new Term(name, first)));
                    }
                }
                continue;
            }

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            return new BooleanQuery();
        }
        if (tokens.size() == 1) {
            String token = tokens.iterator().next();
            if (hasFulltextToken(token)) {
                return new WildcardQuery(newFulltextTerm(token));
            } else {
                return new TermQuery(newFulltextTerm(token));
            }
        } else {
            if (hasFulltextToken(tokens)) {

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      "The Return of Chef", "Nehalem", "Turtle", "Calculus", "Superman-Prime",
      "\"The Losers\"", "pen-pal", "Audio stream input output", "lifehouse",
      "50 greatest gunners", "Polyfecalia", "freeloader", "The Filthy Youth" };


  private static Query[] getPrebuiltQueries(String field) {
    WildcardQuery wcq = new WildcardQuery(new Term(field, "fo*"));
    wcq .setRewriteMethod(MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE);
    // be wary of unanalyzed text
    return new Query[] {
        new SpanFirstQuery(new SpanTermQuery(new Term(field, "ford")), 5),
        new SpanNearQuery(new SpanQuery[] {
            new SpanTermQuery(new Term(field, "night")),

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      indexWriter.commit();
    }
    indexReader = DirectoryReader.open(indexWriter, random().nextBoolean());
    indexWriter.close();
    indexSearcher = new IndexSearcher(indexReader);
    parentsFilter = new FixedBitSetCachingWrapperFilter(new QueryWrapperFilter(new WildcardQuery(new Term("parent", "*"))));
  }

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    int nextRandomChildNumber = getRandomChildNumber(randomChildNumber);
    Query parentQueryWithRandomChild = createChildrenQueryWithOneParent(nextRandomChildNumber);
    ToParentBlockJoinQuery blockJoinQuery = new ToParentBlockJoinQuery(parentQueryWithRandomChild, parentsFilter, ScoreMode.None);
    // advance() method is used by ConjunctionScorer, so we need to create Boolean conjunction query
    BooleanQuery conjunctionQuery = new BooleanQuery();
    WildcardQuery childQuery = new WildcardQuery(new Term("child", createFieldValue(randomChildNumber)));
    conjunctionQuery.add(new BooleanClause(childQuery, BooleanClause.Occur.MUST));
    conjunctionQuery.add(new BooleanClause(blockJoinQuery, BooleanClause.Occur.MUST));


    thrown.expect(IllegalStateException.class);
    thrown.expectMessage("child query must only match non-parent docs");

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    int nextRandomChildNumber = getRandomChildNumber(randomChildNumber);
    Query parentQueryWithRandomChild = createParentsQueryWithOneChild(nextRandomChildNumber);
    ToChildBlockJoinQuery blockJoinQuery = new ToChildBlockJoinQuery(parentQueryWithRandomChild, parentsFilter, false);
    // advance() method is used by ConjunctionScorer, so we need to create Boolean conjunction query
    BooleanQuery conjunctionQuery = new BooleanQuery();
    WildcardQuery childQuery = new WildcardQuery(new Term("child", createFieldValue(randomChildNumber)));
    conjunctionQuery.add(new BooleanClause(childQuery, BooleanClause.Occur.MUST));
    conjunctionQuery.add(new BooleanClause(blockJoinQuery, BooleanClause.Occur.MUST));


    thrown.expect(IllegalStateException.class);
    thrown.expectMessage(ToChildBlockJoinQuery.INVALID_QUERY_MESSAGE);

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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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