Lucene.Net
3.0.3
Lucene.Net is a .NET port of the Java Lucene Indexing Library
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This analyzer is used to facilitate scenarios where different fields require different analysis techniques. Use AddAnalyzer to add a non-default analyzer on a field name basis. More...
Inherits Lucene.Net.Analysis.Analyzer.
Public Member Functions | |
PerFieldAnalyzerWrapper (Analyzer defaultAnalyzer) | |
Constructs with default analyzer. | |
PerFieldAnalyzerWrapper (Analyzer defaultAnalyzer, IEnumerable< KeyValuePair< string, Analyzer >> fieldAnalyzers) | |
Constructs with default analyzer and a map of analyzers to use for specific fields. | |
virtual void | AddAnalyzer (System.String fieldName, Analyzer analyzer) |
Defines an analyzer to use for the specified field. | |
override TokenStream | TokenStream (System.String fieldName, System.IO.TextReader reader) |
override TokenStream | ReusableTokenStream (string fieldName, System.IO.TextReader reader) |
override int | GetPositionIncrementGap (string fieldName) |
Return the positionIncrementGap from the analyzer assigned to fieldName | |
override int | GetOffsetGap (Documents.IFieldable field) |
Return the offsetGap from the analyzer assigned to field | |
override System.String | ToString () |
Public Member Functions inherited from Lucene.Net.Analysis.Analyzer | |
abstract TokenStream | TokenStream (String fieldName, System.IO.TextReader reader) |
Creates a TokenStream which tokenizes all the text in the provided Reader. Must be able to handle null field name for backward compatibility. | |
virtual TokenStream | ReusableTokenStream (String fieldName, System.IO.TextReader reader) |
Creates a TokenStream that is allowed to be re-used from the previous time that the same thread called this method. Callers that do not need to use more than one TokenStream at the same time from this analyzer should use this method for better performance. | |
virtual int | GetPositionIncrementGap (String fieldName) |
Invoked before indexing a Fieldable instance if terms have already been added to that field. This allows custom analyzers to place an automatic position increment gap between Fieldable instances using the same field name. The default value position increment gap is 0. With a 0 position increment gap and the typical default token position increment of 1, all terms in a field, including across Fieldable instances, are in successive positions, allowing exact PhraseQuery matches, for instance, across Fieldable instance boundaries. | |
void | Close () |
Frees persistent resources used by this Analyzer | |
virtual void | Dispose () |
Additional Inherited Members | |
Protected Member Functions inherited from Lucene.Net.Analysis.Analyzer | |
virtual void | Dispose (bool disposing) |
This analyzer is used to facilitate scenarios where different fields require different analysis techniques. Use AddAnalyzer to add a non-default analyzer on a field name basis.
Example usage:
PerFieldAnalyzerWrapper aWrapper = new PerFieldAnalyzerWrapper(new StandardAnalyzer()); aWrapper.addAnalyzer("firstname", new KeywordAnalyzer()); aWrapper.addAnalyzer("lastname", new KeywordAnalyzer());
In this example, StandardAnalyzer will be used for all fields except "firstname" and "lastname", for which KeywordAnalyzer will be used.
A PerFieldAnalyzerWrapper can be used like any other analyzer, for both indexing and query parsing.
Definition at line 43 of file PerFieldAnalyzerWrapper.cs.
Lucene.Net.Analysis.PerFieldAnalyzerWrapper.PerFieldAnalyzerWrapper | ( | Analyzer | defaultAnalyzer | ) |
Constructs with default analyzer.
defaultAnalyzer | Any fields not specifically defined to use a different analyzer will use the one provided here. |
Definition at line 55 of file PerFieldAnalyzerWrapper.cs.
Lucene.Net.Analysis.PerFieldAnalyzerWrapper.PerFieldAnalyzerWrapper | ( | Analyzer | defaultAnalyzer, |
IEnumerable< KeyValuePair< string, Analyzer >> | fieldAnalyzers | ||
) |
Constructs with default analyzer and a map of analyzers to use for specific fields.
defaultAnalyzer | Any fields not specifically defined to use a different analyzer will use the one provided here. |
fieldAnalyzers | a Map (String field name to the Analyzer) to be used for those fields |
Definition at line 70 of file PerFieldAnalyzerWrapper.cs.
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virtual |
Defines an analyzer to use for the specified field.
fieldName | field name requiring a non-default analyzer |
analyzer | non-default analyzer to use for field |
Definition at line 89 of file PerFieldAnalyzerWrapper.cs.
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virtual |
Return the offsetGap from the analyzer assigned to field
Reimplemented from Lucene.Net.Analysis.Analyzer.
Definition at line 123 of file PerFieldAnalyzerWrapper.cs.
override int Lucene.Net.Analysis.PerFieldAnalyzerWrapper.GetPositionIncrementGap | ( | string | fieldName | ) |
Return the positionIncrementGap from the analyzer assigned to fieldName
Definition at line 116 of file PerFieldAnalyzerWrapper.cs.
override TokenStream Lucene.Net.Analysis.PerFieldAnalyzerWrapper.ReusableTokenStream | ( | string | fieldName, |
System.IO.TextReader | reader | ||
) |
Definition at line 101 of file PerFieldAnalyzerWrapper.cs.
override TokenStream Lucene.Net.Analysis.PerFieldAnalyzerWrapper.TokenStream | ( | System.String | fieldName, |
System.IO.TextReader | reader | ||
) |
Definition at line 94 of file PerFieldAnalyzerWrapper.cs.
override System.String Lucene.Net.Analysis.PerFieldAnalyzerWrapper.ToString | ( | ) |
Definition at line 129 of file PerFieldAnalyzerWrapper.cs.