Class: Treat::Workers::Lexicalizers::Sensers::Wordnet

Inherits:
Object
  • Object
show all
Defined in:
lib/treat/workers/lexicalizers/sensers/wordnet.rb

Overview

Sense information (synonyms, antonyms, hypernyms and hyponyms) obtained through a Ruby parser that accesses Wordnet flat files.

Original paper: George A. Miller (1995). WordNet: A Lexical Database for English. Communications of the ACM Vol. 38, No. 11: 39-41.

Constant Summary collapse

@@indexes =

Noun, adjective and verb indexes.

{}

Class Method Summary collapse

Class Method Details

.sense(word, options = nil) ⇒ Object

Obtain lexical information about a word using the ruby ‘wordnet’ gem.



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# File 'lib/treat/workers/lexicalizers/sensers/wordnet.rb', line 28

def self.sense(word, options = nil)
  
  category = word.check_has(:category)
  
  if !options[:nym] 
    raise Treat::Exception, "You must supply " +
    "the :nym option ('synonyms', 'hypernyms', etc.)"
  end

  if !options[:nym].is_a?(Symbol)
    options[:nym] = options[:nym].intern
  end

  if ![:synonyms, :antonyms,
    :hypernyms, :hyponyms].include?(options[:nym])
    raise Treat::Exception, "You must supply " +
    "a valid :nym option ('synonyms', 'hypernyms', etc.)" 
  end
  
  unless ['noun', 'adjective', 'verb'].
    include?(word.category)
    return []
  end
  
  cat = category.to_s.capitalize
  
  @@indexes[cat] ||= 
  ::WordNet.const_get(cat + 'Index').instance
  lemma = @@indexes[cat].find(word.value.downcase)

  return [] if lemma.nil?
  synsets = []
  
  lemma.synsets.each do |synset|
    synsets << 
    Treat::Workers::Lexicalizers::Sensers::Wordnet::Synset.new(synset)
  end
  
  ((synsets.collect do |ss|
    ss.send(options[:nym])
  end - [word.value]).
  flatten).uniq.map do |token|
    token.gsub('_', ' ')
  end
end