org.apache.lucene.analysis

Class PerFieldAnalyzerWrapper

public class PerFieldAnalyzerWrapper extends Analyzer

This analyzer is used to facilitate scenarios where different fields require different analysis techniques. Use {@link #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.

Constructor Summary
PerFieldAnalyzerWrapper(Analyzer defaultAnalyzer)
Constructs with default analyzer.
Method Summary
voidaddAnalyzer(String fieldName, Analyzer analyzer)
Defines an analyzer to use for the specified field.
TokenStreamtokenStream(String fieldName, Reader reader)
StringtoString()

Constructor Detail

PerFieldAnalyzerWrapper

public PerFieldAnalyzerWrapper(Analyzer defaultAnalyzer)
Constructs with default analyzer.

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

Method Detail

addAnalyzer

public void addAnalyzer(String fieldName, Analyzer analyzer)
Defines an analyzer to use for the specified field.

Parameters: fieldName field name requiring a non-default analyzer analyzer non-default analyzer to use for field

tokenStream

public TokenStream tokenStream(String fieldName, Reader reader)

toString

public String toString()
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