Class PatternReplaceCharFilter

CharFilter that uses a regular expression for the target of replace string. The pattern match will be done in each "block" in char stream.

ex1) source="aa bb aa bb", pattern="(aa)\s+(bb)" replacement="$1#$2" output="aa#bb aa#bb"

NOTE: If you produce a phrase that has different length to source string and the field is used for highlighting for a term of the phrase, you will face a trouble.

ex2) source="aa123bb", pattern="(aa)\d+(bb)" replacement="$1 $2" output="aa bb" and you want to search bb and highlight it, you will get highlight snippet="aa1<em>23bb</em>"

@since Solr 1.5

Inheritance
System.Object
CharFilter
BaseCharFilter
PatternReplaceCharFilter
Inherited Members
Namespace: Lucene.Net.Analysis.Pattern
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public class PatternReplaceCharFilter : BaseCharFilter

Constructors

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PatternReplaceCharFilter(Regex, String, Int32, String, TextReader)

Declaration
public PatternReplaceCharFilter(Regex pattern, string replacement, int maxBlockChars, string blockDelimiter, TextReader in)
Parameters
Type Name Description
Regex pattern
System.String replacement
System.Int32 maxBlockChars
System.String blockDelimiter
TextReader in
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PatternReplaceCharFilter(Regex, String, TextReader)

Declaration
public PatternReplaceCharFilter(Regex pattern, string replacement, TextReader in)
Parameters
Type Name Description
Regex pattern
System.String replacement
TextReader in

Fields

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DEFAULT_MAX_BLOCK_CHARS

Declaration
public const int DEFAULT_MAX_BLOCK_CHARS = null
Field Value
Type Description
System.Int32

Methods

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Correct(Int32)

Declaration
protected override int Correct(int currentOff)
Parameters
Type Name Description
System.Int32 currentOff
Returns
Type Description
System.Int32
Overrides
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Read()

Declaration
public override int Read()
Returns
Type Description
System.Int32
Overrides
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Read(Char[], Int32, Int32)

Declaration
public override int Read(char[] cbuf, int off, int len)
Parameters
Type Name Description
System.Char[] cbuf
System.Int32 off
System.Int32 len
Returns
Type Description
System.Int32