Module: OpenNLP

Defined in:
lib/rbbt/nlp/open_nlp/sentence_splitter.rb

Constant Summary collapse

MAX = 
5
@@FileInputStream = 
Rjb::import('java.io.FileInputStream')
@@SentenceModel = 
Rjb::import('opennlp.tools.sentdetect.SentenceModel')
@@SentenceDetectorME = 
Rjb::import('opennlp.tools.sentdetect.SentenceDetectorME')

Class Method Summary collapse

Class Method Details

.sentence_split_detector ⇒ Object 



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# File 'lib/rbbt/nlp/open_nlp/sentence_splitter.rb', line 17

def self.sentence_split_detector
  @@sentence_split_detector ||= begin
                                  modelIn = @@FileInputStream.new(Rbbt.software.opt.OpenNLP.models["da-sent.bin"].produce.find);

                                  model = @@SentenceModel.new(modelIn);
                                  modelIn.close()
                                  model

                                  @@SentenceDetectorME.new(model)
                                end
end

.sentence_splitter(text) ⇒ Object 



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# File 'lib/rbbt/nlp/open_nlp/sentence_splitter.rb', line 29

def self.sentence_splitter(text)
  return [] if text.nil? or text.empty?

  text = Misc.to_utf8(text)
  last = 0
  begin
    sentence_split_detector = self.sentence_split_detector
    
    sentences = nil
    TmpFile.with_file do |tmpfile|
      start_time = Time.now

      begin
        pid = Process.fork do
          sent = sentence_split_detector.sentDetect(text)
          Open.write(tmpfile, sent * "#OpenNLP:SENTENCE#")
        end

        while not Process.waitpid(pid)
          if Time.now - start_time > MAX
            Process.kill(9, pid)
            raise "Taking to long (> #{MAX} seconds)"
          end
          sleep 0.1
        end

        begin
          Process.waitpid(pid)
        end
      rescue Errno::ECHILD
      end

      sentences = Open.read(tmpfile).split("#OpenNLP:SENTENCE#")
    end

    sentences.collect{|sentence|
      sentence = Misc.to_utf8(sentence)
      start = text.index(sentence, last)
      Segment.setup sentence, start
      last = start + sentence.length - 1
      sentence
    }
  rescue Exception
    raise $!
    raise "Sentence splitter raised exception: #{$!.message}"
  end
end