Class PerFieldAnalyzerWrapper

This analyzer is used to facilitate scenarios where different fields Require different analysis techniques. Use the Map argument in PerFieldAnalyzerWrapper(Analyzer, IDictionary<String, Analyzer>) to add non-default analyzers for fields.

Example usage: 

IDictionary<string, Analyzer> analyzerPerField = new Dictionary<string, Analyzer>();
analyzerPerField["firstname"] = new KeywordAnalyzer();
analyzerPerField["lastname"] = new KeywordAnalyzer();

PerFieldAnalyzerWrapper aWrapper =
  new PerFieldAnalyzerWrapper(new StandardAnalyzer(version), analyzerPerField);

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.

Inheritance
System.Object
Lucene.Net.Analysis.Analyzer
Lucene.Net.Analysis.AnalyzerWrapper
PerFieldAnalyzerWrapper
Implements
System.IDisposable
Inherited Members
Lucene.Net.Analysis.Analyzer.Strategy
Lucene.Net.Analysis.Analyzer.Dispose()
Lucene.Net.Analysis.Analyzer.GLOBAL_REUSE_STRATEGY
Lucene.Net.Analysis.Analyzer.PER_FIELD_REUSE_STRATEGY
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)
Namespace: Lucene.Net.Analysis.Miscellaneous
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public sealed class PerFieldAnalyzerWrapper : AnalyzerWrapper, IDisposable

Constructors

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PerFieldAnalyzerWrapper(Analyzer)

Constructs with default analyzer.

Declaration
public PerFieldAnalyzerWrapper(Analyzer defaultAnalyzer)
Parameters
Type Name Description
Lucene.Net.Analysis.Analyzer defaultAnalyzer

Any fields not specifically defined to use a different analyzer will use the one provided here.

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PerFieldAnalyzerWrapper(Analyzer, IDictionary<String, Analyzer>)

Constructs with default analyzer and a map of analyzers to use for specific fields.

The type of System.Collections.Generic.IDictionary<TKey, TValue> supplied will determine the type of behavior.

System.Collections.Generic.Dictionary`2General use. null keys are not supported.
System.Collections.Generic.SortedDictionary`2Use when sorted keys are required. null keys are not supported.
J2N.Collections.Generic.Dictionary`2Similar behavior as System.Collections.Generic.Dictionary`2. null keys are supported.
J2N.Collections.Generic.SortedDictionary`2Use when sorted keys are required. null keys are supported.
J2N.Collections.Generic.LinkedDictionary`2Use when insertion order must be preserved (System.Collections.Generic.Dictionary`2 preserves insertion order only until items are removed). null keys are supported.
Or, use a 3rd party or custom System.Collections.Generic.IDictionary<TKey, TValue> if other behavior is desired.

Declaration
public PerFieldAnalyzerWrapper(Analyzer defaultAnalyzer, IDictionary<string, Analyzer> fieldAnalyzers)
Parameters
Type Name Description
Lucene.Net.Analysis.Analyzer defaultAnalyzer

Any fields not specifically defined to use a different analyzer will use the one provided here.

System.Collections.Generic.IDictionary<System.String, Lucene.Net.Analysis.Analyzer> fieldAnalyzers

A System.Collections.Generic.IDictionary<TKey, TValue> (String field name to the Analyzer) to be used for those fields.

Methods

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GetWrappedAnalyzer(String)

Declaration
protected override Analyzer GetWrappedAnalyzer(string fieldName)
Parameters
Type Name Description
System.String fieldName
Returns
Type Description
Lucene.Net.Analysis.Analyzer
Overrides
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ToString()

Declaration
public override string ToString()
Returns
Type Description
System.String
Overrides
System.Object.ToString()

Implements

System.IDisposable