Class QueryParserBase

This class is overridden by QueryParser.

Inheritance

System.Object

Lucene.Net.Util.QueryBuilder

QueryParserBase

QueryParser

Implements

ICommonQueryParserConfiguration

Inherited Members

QueryBuilder.CreateBooleanQuery(String, String)

QueryBuilder.CreateBooleanQuery(String, String, Occur)

QueryBuilder.CreatePhraseQuery(String, String)

QueryBuilder.CreatePhraseQuery(String, String, Int32)

QueryBuilder.CreateMinShouldMatchQuery(String, String, Single)

Lucene.Net.Util.QueryBuilder.Analyzer

Lucene.Net.Util.QueryBuilder.EnablePositionIncrements

QueryBuilder.CreateFieldQuery(Analyzer, Occur, String, String, Boolean, Int32)

QueryBuilder.NewBooleanQuery(Boolean)

Lucene.Net.Util.QueryBuilder.NewTermQuery(Lucene.Net.Index.Term)

Lucene.Net.Util.QueryBuilder.NewPhraseQuery()

Lucene.Net.Util.QueryBuilder.NewMultiPhraseQuery()

System.Object.Equals(System.Object)

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

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

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

System.Object.ToString()

Namespace: Lucene.Net.QueryParsers.Classic

Assembly: Lucene.Net.QueryParser.dll

Syntax

public abstract class QueryParserBase : QueryBuilder, ICommonQueryParserConfiguration

Constructors

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QueryParserBase()

So the generated QueryParser(CharStream) won't error out

Declaration

protected QueryParserBase()

Fields

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AND_OPERATOR

Alternative form of AND

Declaration

public const Operator AND_OPERATOR = Operator.AND

Field Value

Type	Description
Operator

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CONJ_AND

Declaration

protected const int CONJ_AND = 1

Field Value

Type	Description
System.Int32

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CONJ_NONE

Declaration

protected const int CONJ_NONE = 0

Field Value

Type	Description
System.Int32

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CONJ_OR

Declaration

protected const int CONJ_OR = 2

Field Value

Type	Description
System.Int32

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m_field

Declaration

protected string m_field

Field Value

Type	Description
System.String

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MOD_NONE

Declaration

protected const int MOD_NONE = 0

Field Value

Type	Description
System.Int32

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MOD_NOT

Declaration

protected const int MOD_NOT = 10

Field Value

Type	Description
System.Int32

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MOD_REQ

Declaration

protected const int MOD_REQ = 11

Field Value

Type	Description
System.Int32

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OR_OPERATOR

Alternative form of OR

Declaration

public const Operator OR_OPERATOR = Operator.OR

Field Value

Type	Description
Operator

Properties

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AllowLeadingWildcard

Set to true to allow leading wildcard characters.

When set, * or ? are allowed as the first character of a PrefixQuery and WildcardQuery. Note that this can produce very slow queries on big indexes.

Default: false.

Declaration

public virtual bool AllowLeadingWildcard { get; set; }

Property Value

Type	Description
System.Boolean

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AnalyzeRangeTerms

Get or Set whether or not to analyze range terms when constructing Lucene.Net.Search.TermRangeQuerys. For example, setting this to true can enable analyzing terms into collation keys for locale-sensitive Lucene.Net.Search.TermRangeQuery.

Declaration

public virtual bool AnalyzeRangeTerms { get; set; }

Property Value

Type	Description
System.Boolean

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AutoGeneratePhraseQueries

Set to true if phrase queries will be automatically generated when the analyzer returns more than one term from whitespace delimited text. NOTE: this behavior may not be suitable for all languages.

Set to false if phrase queries should only be generated when surrounded by double quotes.

Declaration

public bool AutoGeneratePhraseQueries { get; set; }

Property Value

Type	Description
System.Boolean

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DefaultOperator

Gets or Sets the boolean operator of the QueryParser. In default mode (OR_OPERATOR) terms without any modifiers are considered optional: for example capital of Hungary is equal to capital OR of OR Hungary.

In AND_OPERATOR mode terms are considered to be in conjunction: the above mentioned query is parsed as capital AND of AND Hungary

Declaration

public virtual Operator DefaultOperator { get; set; }

Property Value

Type	Description
Operator

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Field

Returns the default field.

Declaration

public virtual string Field { get; }

Property Value

Type	Description
System.String

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FuzzyMinSim

Get or Set the minimum similarity for fuzzy queries. Default is 2f.

Declaration

public virtual float FuzzyMinSim { get; set; }

Property Value

Type	Description
System.Single

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FuzzyPrefixLength

Get or Set the prefix length for fuzzy queries. Default is 0.

Declaration

public virtual int FuzzyPrefixLength { get; set; }

Property Value

Type	Description
System.Int32

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Locale

Get or Set locale used by date range parsing, lowercasing, and other locale-sensitive operations.

By default, the culture is null, which indicates to read the culture on the fly from System.Globalization.CultureInfo.CurrentCulture. This ensures if you change the culture on the current thread, QueryParser will utilize it. You can also explicitly set a culture. Setting the culture to null will restore the default behavior if you have explicitly set a culture.

Declaration

public virtual CultureInfo Locale { get; set; }

Property Value

Type	Description
System.Globalization.CultureInfo

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LowercaseExpandedTerms

Whether terms of wildcard, prefix, fuzzy and range queries are to be automatically lower-cased or not. Default is true.

Declaration

public virtual bool LowercaseExpandedTerms { get; set; }

Property Value

Type	Description
System.Boolean

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MultiTermRewriteMethod

By default QueryParser uses Lucene.Net.Search.MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT when creating a Lucene.Net.Search.PrefixQuery, Lucene.Net.Search.WildcardQuery or Lucene.Net.Search.TermRangeQuery. This implementation is generally preferable because it a) Runs faster b) Does not have the scarcity of terms unduly influence score c) avoids any Lucene.Net.Search.BooleanQuery.TooManyClausesException exception. However, if your application really needs to use the old-fashioned Lucene.Net.Search.BooleanQuery expansion rewriting and the above points are not relevant then use this to change the rewrite method.

Declaration

public virtual MultiTermQuery.RewriteMethod MultiTermRewriteMethod { get; set; }

Property Value

Type	Description
Lucene.Net.Search.MultiTermQuery.RewriteMethod

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PhraseSlop

Gets or Sets the default slop for phrases. If zero, then exact phrase matches are required. Default value is zero.

Declaration

public virtual int PhraseSlop { get; set; }

Property Value

Type	Description
System.Int32

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TimeZone

Get or Set the current time zone for date and time parsing operations.

By default, the time zone is null, which indicates to read the time zone on the fly from System.TimeZoneInfo.Local. This ensures if you change the time zone on the current system, QueryParser will utilize it. You can also explicitly set a time zone. Setting the time zone to null will restore the default behavior if you have explicitly set a time zone.

Declaration

public virtual TimeZoneInfo TimeZone { get; set; }

Property Value

Type	Description
System.TimeZoneInfo

Methods

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AddClause(IList<BooleanClause>, Int32, Int32, Query)

Declaration

protected virtual void AddClause(IList<BooleanClause> clauses, int conj, int mods, Query q)

Parameters

Type	Name	Description
System.Collections.Generic.IList<Lucene.Net.Search.BooleanClause>	clauses
System.Int32	conj
System.Int32	mods
Lucene.Net.Search.Query	q

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AnalyzeMultitermTerm(String, String, Analyzer)

Declaration

protected virtual BytesRef AnalyzeMultitermTerm(string field, string part, Analyzer analyzerIn)

Parameters

Type	Name	Description
System.String	field
System.String	part
Lucene.Net.Analysis.Analyzer	analyzerIn

Returns

Type	Description
Lucene.Net.Util.BytesRef

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Escape(String)

Returns a string where those characters that QueryParser expects to be escaped are escaped by a preceding

Declaration

public static string Escape(string s)

Parameters

Type	Name	Description
System.String	s

Returns

Type	Description
System.String

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GetBooleanQuery(IList<BooleanClause>)

Factory method for generating query, given a set of clauses. By default creates a boolean query composed of clauses passed in.

Can be overridden by extending classes, to modify query being returned.

Declaration

protected virtual Query GetBooleanQuery(IList<BooleanClause> clauses)

Parameters

Type	Name	Description
System.Collections.Generic.IList<Lucene.Net.Search.BooleanClause>	clauses	List that contains Lucene.Net.Search.BooleanClause instances to join.

Returns

Type	Description
Lucene.Net.Search.Query	Resulting Lucene.Net.Search.Query object.

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetBooleanQuery(IList<BooleanClause>, Boolean)

Factory method for generating query, given a set of clauses. By default creates a boolean query composed of clauses passed in.

Can be overridden by extending classes, to modify query being returned.

Declaration

protected virtual Query GetBooleanQuery(IList<BooleanClause> clauses, bool disableCoord)

Parameters

Type	Name	Description
System.Collections.Generic.IList<Lucene.Net.Search.BooleanClause>	clauses	List that contains Lucene.Net.Search.BooleanClause instances to join.
System.Boolean	disableCoord	true if coord scoring should be disabled.

Returns

Type	Description
Lucene.Net.Search.Query	Resulting Lucene.Net.Search.Query object.

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetDateResolution(String)

Returns the date resolution that is used by RangeQueries for the given field. Returns null, if no default or field specific date resolution has been set for the given field.

Declaration

public virtual DateResolution GetDateResolution(string fieldName)

Parameters

Type	Name	Description
System.String	fieldName

Returns

Type	Description
Lucene.Net.Documents.DateResolution

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GetFieldQuery(String, String, Boolean)

Declaration

protected virtual Query GetFieldQuery(string field, string queryText, bool quoted)

Parameters

Type	Name	Description
System.String	field
System.String	queryText
System.Boolean	quoted

Returns

Type	Description
Lucene.Net.Search.Query

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetFieldQuery(String, String, Int32)

Base implementation delegates to GetFieldQuery(String, String, Boolean). This method may be overridden, for example, to return a Lucene.Net.Search.Spans.SpanNearQuery instead of a Lucene.Net.Search.PhraseQuery.

Declaration

protected virtual Query GetFieldQuery(string field, string queryText, int slop)

Parameters

Type	Name	Description
System.String	field
System.String	queryText
System.Int32	slop

Returns

Type	Description
Lucene.Net.Search.Query

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetFuzzyQuery(String, String, Single)

Factory method for generating a query (similar to GetWildcardQuery(String, String)). Called when parser parses an input term token that has the fuzzy suffix (~) appended.

Declaration

protected virtual Query GetFuzzyQuery(string field, string termStr, float minSimilarity)

Parameters

Type	Name	Description
System.String	field	Name of the field query will use.
System.String	termStr	Term token to use for building term for the query
System.Single	minSimilarity	minimum similarity

Returns

Type	Description
Lucene.Net.Search.Query	Resulting Lucene.Net.Search.Query built for the term

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetPrefixQuery(String, String)

Factory method for generating a query (similar to GetWildcardQuery(String, String)). Called when parser parses an input term token that uses prefix notation; that is, contains a single '*' wildcard character as its last character. Since this is a special case of generic wildcard term, and such a query can be optimized easily, this usually results in a different query object.

Depending on settings, a prefix term may be lower-cased automatically. It will not go through the default Analyzer, however, since normal Analyzers are unlikely to work properly with wildcard templates.

Can be overridden by extending classes, to provide custom handling for wild card queries, which may be necessary due to missing analyzer calls.

Declaration

protected virtual Query GetPrefixQuery(string field, string termStr)

Parameters

Type	Name	Description
System.String	field	Name of the field query will use.
System.String	termStr	Term token to use for building term for the query

Returns

Type	Description
Lucene.Net.Search.Query	Resulting Lucene.Net.Search.Query built for the term

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetRangeQuery(String, String, String, Boolean, Boolean)

Declaration

protected virtual Query GetRangeQuery(string field, string part1, string part2, bool startInclusive, bool endInclusive)

Parameters

Type	Name	Description
System.String	field
System.String	part1
System.String	part2
System.Boolean	startInclusive
System.Boolean	endInclusive

Returns

Type	Description
Lucene.Net.Search.Query

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GetRegexpQuery(String, String)

Factory method for generating a query. Called when parser parses an input term token that contains a regular expression query.

Depending on settings, pattern term may be lower-cased automatically. It will not go through the default Analyzer, however, since normal Analyzers are unlikely to work properly with regular expression templates.

Can be overridden by extending classes, to provide custom handling for regular expression queries, which may be necessary due to missing analyzer calls.

Declaration

protected virtual Query GetRegexpQuery(string field, string termStr)

Parameters

Type	Name	Description
System.String	field	Name of the field query will use.
System.String	termStr	Term token that contains a regular expression

Returns

Type	Description
Lucene.Net.Search.Query	Resulting Lucene.Net.Search.Query built for the term

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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GetWildcardQuery(String, String)

Factory method for generating a query. Called when parser parses an input term token that contains one or more wildcard characters (? and *), but is not a prefix term token (one that has just a single * character at the end)

Depending on settings, prefix term may be lower-cased automatically. It will not go through the default Analyzer, however, since normal Analyzers are unlikely to work properly with wildcard templates.

Can be overridden by extending classes, to provide custom handling for wildcard queries, which may be necessary due to missing analyzer calls.

Declaration

protected virtual Query GetWildcardQuery(string field, string termStr)

Parameters

Type	Name	Description
System.String	field	Name of the field query will use.
System.String	termStr	Term token that contains one or more wild card characters (? or *), but is not simple prefix term

Returns

Type	Description
Lucene.Net.Search.Query	Resulting Lucene.Net.Search.Query built for the term

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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Init(LuceneVersion, String, Analyzer)

Initializes a query parser. Called by the QueryParser constructor

Declaration

public virtual void Init(LuceneVersion matchVersion, string f, Analyzer a)

Parameters

Type	Name	Description
Lucene.Net.Util.LuceneVersion	matchVersion	Lucene version to match.
System.String	f	the default field for query terms.
Lucene.Net.Analysis.Analyzer	a	used to find terms in the query text.

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NewBooleanClause(Query, Occur)

Builds a new Lucene.Net.Search.BooleanClause instance

Declaration

protected virtual BooleanClause NewBooleanClause(Query q, Occur occur)

Parameters

Type	Name	Description
Lucene.Net.Search.Query	q	sub query
Lucene.Net.Search.Occur	occur	how this clause should occur when matching documents

Returns

Type	Description
Lucene.Net.Search.BooleanClause	new Lucene.Net.Search.BooleanClause instance

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NewFieldQuery(Analyzer, String, String, Boolean)

Declaration

protected virtual Query NewFieldQuery(Analyzer analyzer, string field, string queryText, bool quoted)

Parameters

Type	Name	Description
Lucene.Net.Analysis.Analyzer	analyzer
System.String	field
System.String	queryText
System.Boolean	quoted

Returns

Type	Description
Lucene.Net.Search.Query

Exceptions

Type	Condition
ParseException	throw in overridden method to disallow

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NewFuzzyQuery(Term, Single, Int32)

Builds a new Lucene.Net.Search.FuzzyQuery instance

Declaration

protected virtual Query NewFuzzyQuery(Term term, float minimumSimilarity, int prefixLength)

Parameters

Type	Name	Description
Lucene.Net.Index.Term	term	Term
System.Single	minimumSimilarity	minimum similarity
System.Int32	prefixLength	prefix length

Returns

Type	Description
Lucene.Net.Search.Query	new Lucene.Net.Search.FuzzyQuery Instance

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NewMatchAllDocsQuery()

Builds a new Lucene.Net.Search.MatchAllDocsQuery instance

Declaration

protected virtual Query NewMatchAllDocsQuery()

Returns

Type	Description
Lucene.Net.Search.Query	new Lucene.Net.Search.MatchAllDocsQuery instance

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NewPrefixQuery(Term)

Builds a new Lucene.Net.Search.PrefixQuery instance

Declaration

protected virtual Query NewPrefixQuery(Term prefix)

Parameters

Type	Name	Description
Lucene.Net.Index.Term	prefix	Prefix term

Returns

Type	Description
Lucene.Net.Search.Query	new Lucene.Net.Search.PrefixQuery instance

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NewRangeQuery(String, String, String, Boolean, Boolean)

Builds a new Lucene.Net.Search.TermRangeQuery instance

Declaration

protected virtual Query NewRangeQuery(string field, string part1, string part2, bool startInclusive, bool endInclusive)

Parameters

Type	Name	Description
System.String	field	Field
System.String	part1	min
System.String	part2	max
System.Boolean	startInclusive	true if the start of the range is inclusive
System.Boolean	endInclusive	true if the end of the range is inclusive

Returns

Type	Description
Lucene.Net.Search.Query	new Lucene.Net.Search.TermRangeQuery instance

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NewRegexpQuery(Term)

Builds a new Lucene.Net.Search.RegexpQuery instance

Declaration

protected virtual Query NewRegexpQuery(Term regexp)

Parameters

Type	Name	Description
Lucene.Net.Index.Term	regexp	Regexp term

Returns

Type	Description
Lucene.Net.Search.Query	new Lucene.Net.Search.RegexpQuery instance

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NewWildcardQuery(Term)

Builds a new Lucene.Net.Search.WildcardQuery instance

Declaration

protected virtual Query NewWildcardQuery(Term t)

Parameters

Type	Name	Description
Lucene.Net.Index.Term	t	wildcard term

Returns

Type	Description
Lucene.Net.Search.Query	new Lucene.Net.Search.WildcardQuery instance

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Parse(String)

Parses a query string, returning a Lucene.Net.Search.Query.

Declaration

public virtual Query Parse(string query)

Parameters

Type	Name	Description
System.String	query	the query string to be parsed.

Returns

Type	Description
Lucene.Net.Search.Query

Exceptions

Type	Condition
ParseException	if the parsing fails

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ReInit(ICharStream)

Declaration

public abstract void ReInit(ICharStream stream)

Parameters

Type	Name	Description
ICharStream	stream

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SetDateResolution(DateResolution)

Gets or Sets the default date resolution used by RangeQueries for fields for which no specific date resolutions has been set. Field specific resolutions can be set with SetDateResolution(String, DateResolution).

Declaration

public virtual void SetDateResolution(DateResolution dateResolution)

Parameters

Type	Name	Description
Lucene.Net.Documents.DateResolution	dateResolution

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SetDateResolution(String, DateResolution)

Sets the date resolution used by RangeQueries for a specific field.

Declaration

public virtual void SetDateResolution(string fieldName, DateResolution dateResolution)

Parameters

Type	Name	Description
System.String	fieldName	field for which the date resolution is to be set
Lucene.Net.Documents.DateResolution	dateResolution	date resolution to set

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TopLevelQuery(String)

Declaration

public abstract Query TopLevelQuery(string field)

Parameters

Type	Name	Description
System.String	field

Returns

Type	Description
Lucene.Net.Search.Query

Implements

ICommonQueryParserConfiguration