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 ?. More...

Inherits Lucene.Net.Search.MultiTermQuery.

Public Member Functions
	WildcardQuery (Term term)

override Query	Rewrite (IndexReader reader)
	Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

override System.String	ToString (System.String field)
	Prints a user-readable version of this query.

override int	GetHashCode ()

override bool	Equals (System.Object obj)

Public Member Functions inherited from Lucene.Net.Search.MultiTermQuery
virtual void	ClearTotalNumberOfTerms ()
	Expert: Resets the counting of unique terms. Do this before executing the query/filter.

override int	GetHashCode ()

override bool	Equals (System.Object obj)

Public Member Functions inherited from Lucene.Net.Search.Query
override System.String	ToString ()
	Prints a query to a string.

virtual Weight	CreateWeight (Searcher searcher)
	Expert: Constructs an appropriate Weight implementation for this query.

virtual Weight	Weight (Searcher searcher)
	Expert: Constructs and initializes a Weight for a top-level query.

virtual Query	Combine (Query[] queries)
	Expert: called when re-writing queries under MultiSearcher.

virtual void	ExtractTerms (System.Collections.Generic.ISet< Term > terms)
	Expert: adds all terms occuring in this query to the terms set. Only works if this query is in its rewritten form.

virtual Similarity	GetSimilarity (Searcher searcher)
	Expert: Returns the Similarity implementation to be used for this query. Subclasses may override this method to specify their own Similarity implementation, perhaps one that delegates through that of the Searcher. By default the Searcher's Similarity implementation is returned.

virtual System.Object	Clone ()
	Returns a clone of this query.

override int	GetHashCode ()

override bool	Equals (System.Object obj)

Properties
Term	Term `[get]`
	Returns the pattern term.

Properties inherited from Lucene.Net.Search.MultiTermQuery
virtual int	TotalNumberOfTerms `[get]`
	Expert: Return the number of unique terms visited during execution of the query. If there are many of them, you may consider using another query type or optimize your total term count in index. This method is not thread safe, be sure to only call it when no query is running! If you re-use the same query instance for another search, be sure to first reset the term counter with ClearTotalNumberOfTerms. On optimized indexes / no MultiReaders, you get the correct number of unique terms for the whole index. Use this number to compare different queries. For non-optimized indexes this number can also be achived in non-constant-score mode. In constant-score mode you get the total number of terms seeked for all segments / sub-readers.

virtual RewriteMethod	RewriteMethod `[get, set]`
	Sets the rewrite method to be used when executing the query. You can use one of the four core methods, or implement your own subclass of Search.RewriteMethod.

Properties inherited from Lucene.Net.Search.Query
virtual float	Boost `[get, set]`
	Gets or sets the boost for this query clause to `b`. Documents matching this clause will (in addition to the normal weightings) have their score multiplied by `b`. The boost is 1.0 by default.

Additional Inherited Members
Static Public Member Functions inherited from Lucene.Net.Search.Query
static Query	MergeBooleanQueries (params BooleanQuery[] queries)
	Expert: merges the clauses of a set of BooleanQuery's into a single BooleanQuery.

Static Public Attributes inherited from Lucene.Net.Search.MultiTermQuery
static readonly RewriteMethod	CONSTANT_SCORE_FILTER_REWRITE = new ConstantScoreFilterRewrite()
	A rewrite method that first creates a private Filter, by visiting each term in sequence and marking all docs for that term. Matching documents are assigned a constant score equal to the query's boost.

static readonly RewriteMethod	SCORING_BOOLEAN_QUERY_REWRITE = new ScoringBooleanQueryRewrite()
	A rewrite method that first translates each term into Occur.SHOULD clause in a BooleanQuery, and keeps the scores as computed by the query. Note that typically such scores are meaningless to the user, and require non-trivial CPU to compute, so it's almost always better to use CONSTANT_SCORE_AUTO_REWRITE_DEFAULT instead.

static readonly RewriteMethod	CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE = new ConstantScoreBooleanQueryRewrite()
	Like SCORING_BOOLEAN_QUERY_REWRITE except scores are not computed. Instead, each matching document receives a constant score equal to the query's boost.

static readonly RewriteMethod	CONSTANT_SCORE_AUTO_REWRITE_DEFAULT
	Read-only default instance of ConstantScoreAutoRewrite , with ConstantScoreAutoRewrite.TermCountCutoff set to ConstantScoreAutoRewrite.DEFAULT_TERM_COUNT_CUTOFF

Protected Member Functions inherited from Lucene.Net.Search.MultiTermQuery
	MultiTermQuery ()
	Constructs a query matching terms that cannot be represented with a single Term.

Detailed Description

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 MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT

rewrite method.

See Also: WildcardTermEnum

Definition at line 42 of file WildcardQuery.cs.

Constructor & Destructor Documentation

Lucene.Net.Search.WildcardQuery.WildcardQuery ( Term term )

Definition at line 48 of file WildcardQuery.cs.

Member Function Documentation

override bool Lucene.Net.Search.WildcardQuery.Equals ( System.Object obj )

Definition at line 117 of file WildcardQuery.cs.

override int Lucene.Net.Search.WildcardQuery.GetHashCode ( )

Definition at line 108 of file WildcardQuery.cs.

override Query Lucene.Net.Search.WildcardQuery.Rewrite ( IndexReader reader )

virtual

Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

Reimplemented from Lucene.Net.Search.MultiTermQuery.

Definition at line 77 of file WildcardQuery.cs.

override System.String Lucene.Net.Search.WildcardQuery.ToString ( System.String field )

virtual

Prints a user-readable version of this query.

Implements Lucene.Net.Search.Query.

Definition at line 94 of file WildcardQuery.cs.