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Contents
# encoding: utf-8
module XapianDb
module Repositories
# The stemmer is a repository that manages stemmers for the supported
# languges
# @author Gernot Kogler
class Stemmer
class << self
# Get or build the stemmer for a language
# @param [Symbol, String] iso_cd The iso code for the language (:en, :de ...)
# @return [Xapian::Stem] The Stemmer for this lanugage
def stemmer_for(iso_cd)
@stemmers ||= {}
return nil if iso_cd.nil?
key = iso_cd.to_sym
# Do we already have a stemmer for this language?
return @stemmers[key] unless @stemmers[key].nil?
# Do we support this language?
unless (LANGUAGE_MAP.keys + [:none]).include?(key)
raise ArgumentError.new "Language #{iso_cd} is not supported by XapianDb (remember to use the language iso codes)"
end
# Let's build the stemmer
@stemmers[key] = Xapian::Stem.new(key.to_s)
end
end
end
end
end
Version data entries
68 entries across 68 versions & 1 rubygems