Class PatternReplaceFilter

A TokenFilter which applies a System.Text.RegularExpressions.Regex to each token in the stream, replacing match occurances with the specified replacement string.

Note: Depending on the input and the pattern used and the input TokenStream, this TokenFilter may produce Tokens whose text is the empty string.

Inheritance
System.Object
AttributeSource
TokenStream
TokenFilter
PatternReplaceFilter
Implements
System.IDisposable
Inherited Members
System.Object.Equals(System.Object, System.Object)
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Analysis.Pattern
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public sealed class PatternReplaceFilter : TokenFilter, IDisposable

Constructors

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PatternReplaceFilter(TokenStream, Regex, String, Boolean)

Constructs an instance to replace either the first, or all occurances

Declaration
public PatternReplaceFilter(TokenStream in, Regex pattern, string replacement, bool all)
Parameters
Type Name Description
TokenStream in

the TokenStream to process

System.Text.RegularExpressions.Regex pattern

the pattern (a System.Text.RegularExpressions.Regex object) to apply to each Token

System.String replacement

the "replacement string" to substitute, if null a blank string will be used. Note that this is not the literal string that will be used, '$' and '' have special meaning.

System.Boolean all

if true, all matches will be replaced otherwise just the first match.

See Also
System.Text.RegularExpressions.Regex.Replace(System.String,System.String)

Methods

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IncrementToken()

Declaration
public override bool IncrementToken()
Returns
Type Description
System.Boolean
Overrides

Implements

System.IDisposable

See Also

System.Text.RegularExpressions.Regex