Module: OpenNLP

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

Constant Summary collapse

MAX = 
5

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 14

def self.sentence_split_detector
  @@sentence_split_detector ||= begin
                                  Rbbt.software.opt.OpenNLP.produce
                                  Rbbt.software.opt.OpenNLP.models["da-sent.bin"].produce

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

                                  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 33

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

  Segment.ascii(text, "?") do
    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
end