This analyzer is used to facilitate scenarios where different fields require different analysis techniques. Use the Map argument in
#PerFieldAnalyzerWrapper(Analyzer, java.util.Map) to add non-default analyzers for fields.
Example usage:
{@code Map analyzerPerField = new HashMap<>(); analyzerPerField.put("firstname", new KeywordAnalyzer()); analyzerPerField.put("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.