Class WildcardQuery

Implements the wildcard search query. Supported wildcards are , which matches any character sequence (including the empty one), and ?, which matches any single character. '' is the escape 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 the wildcard

This query uses the CONSTANT_SCORE_AUTO_REWRITE_DEFAULT rewrite method.

Inheritance

System.Object

Query

MultiTermQuery

AutomatonQuery

WildcardQuery

Inherited Members

AutomatonQuery.m_automaton

AutomatonQuery.m_compiled

AutomatonQuery.m_term

AutomatonQuery.GetTermsEnum(Terms, AttributeSource)

AutomatonQuery.GetHashCode()

AutomatonQuery.Equals(Object)

AutomatonQuery.Automaton

MultiTermQuery.m_field

MultiTermQuery.m_rewriteMethod

MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE

MultiTermQuery.SCORING_BOOLEAN_QUERY_REWRITE

MultiTermQuery.CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE

MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT

MultiTermQuery.Field

MultiTermQuery.GetTermsEnum(Terms)

MultiTermQuery.Rewrite(IndexReader)

MultiTermQuery.MultiTermRewriteMethod

Query.Boost

Query.ToString()

Query.CreateWeight(IndexSearcher)

Query.ExtractTerms(ISet<Term>)

Query.Clone()

System.Object.Equals(System.Object, System.Object)

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

Namespace: Lucene.Net.Search

Assembly: Lucene.Net.dll

Syntax

public class WildcardQuery : AutomatonQuery

Constructors

WildcardQuery(Term)

Constructs a query for terms matching term.

Declaration

public WildcardQuery(Term term)

Parameters

Type	Name	Description
Term	term

Fields

WILDCARD_CHAR

Char equality with support for wildcards

Declaration

public const char WILDCARD_CHAR = '?'

Field Value

Type	Description
System.Char

WILDCARD_ESCAPE

Escape character

Declaration

public const char WILDCARD_ESCAPE = '\\'

Field Value

Type	Description
System.Char

WILDCARD_STRING

String equality with support for wildcards

Declaration

public const char WILDCARD_STRING = '*'

Field Value

Type	Description
System.Char

Properties

Term

Returns the pattern term.

Declaration

public virtual Term Term { get; }

Property Value

Type	Description
Term

Methods

ToAutomaton(Term)

Convert Lucene wildcard syntax into an automaton.

This is a Lucene.NET INTERNAL API, use at your own risk

Declaration

public static Automaton ToAutomaton(Term wildcardquery)

Parameters

Type	Name	Description
Term	wildcardquery

Returns

Type	Description
Automaton

ToString(String)

Prints a user-readable version of this query.

Declaration

public override string ToString(string field)

Parameters

Type	Name	Description
System.String	field

Returns

Type	Description
System.String

Overrides

AutomatonQuery.ToString(String)

Extension Methods

Number.IsNumber(Object)

See Also

AutomatonQuery