Class Ferret::Analysis::AsciiLetterAnalyzer
In: ext/r_analysis.c
Parent: Ferret::Analysis::Analyzer

Summary

An AsciiLetterAnalyzer creates a TokenStream that splits the input up into maximal strings of ASCII characters. If implemented in Ruby it would look like;

  class AsciiLetterAnalyzer
    def initialize(lower = true)
      @lower = lower
    end

    def token_stream(field, str)
      if @lower
        return AsciiLowerCaseFilter.new(AsciiLetterTokenizer.new(str))
      else
        return AsciiLetterTokenizer.new(str)
      end
    end
  end

As you can see it makes use of the AsciiLetterTokenizer and AsciiLowerCaseFilter. Note that this tokenizer won‘t recognize non-ASCII characters so you should use the LetterAnalyzer is you want to analyze multi-byte data like "UTF-8".

Methods

new  

Public Class methods

Create a new AsciiWhiteSpaceAnalyzer which downcases tokens by default but can optionally leave case as is. Lowercasing will only be done to ASCII characters.

lower:set to false if you don‘t want the field‘s tokens to be downcased

[Validate]