Class: OSCAR3

Inherits:
NER
  • Object
show all
Defined in:
lib/rbbt/ner/oscar3.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from NER

#entities, #extract, #initialize

Constructor Details

This class inherits a constructor from NER

Class Method Details

.init ⇒ Object 



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# File 'lib/rbbt/ner/oscar3.rb', line 9

def self.init
  @@TextToSciXML              ||= Rjb::import('uk.ac.cam.ch.wwmm.ptclib.scixml.TextToSciXML')
  @@ProcessingDocumentFactory ||= Rjb::import('uk.ac.cam.ch.wwmm.oscar3.recogniser.document.ProcessingDocumentFactory')
  @@MEMMSingleton             ||= Rjb::import('uk.ac.cam.ch.wwmm.oscar3.recogniser.memm.MEMMSingleton')
  @@DFANEFinder               ||= Rjb::import('uk.ac.cam.ch.wwmm.oscar3.recogniser.finder.DFANEFinder')
  @@MEMM                      ||= @@MEMMSingleton.getInstance();
  @@DFA                       ||= @@DFANEFinder.getInstance();
end

.match(text, type = nil, memm = false) ⇒ Object 



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# File 'lib/rbbt/ner/oscar3.rb', line 18

def self.match(text,  type = nil, memm =  false)
  self.init
  doc  = @@ProcessingDocumentFactory.getInstance().makeTokenisedDocument(@@TextToSciXML.textToSciXML(text), true, false, false);
  mentions = []
  it = doc.getTokenSequences().iterator

  type = [type] unless type.nil? or Array === type
  while it.hasNext do 
    sequence = it.next

    # Fix sequence offset
    sequence_str = sequence.getSourceString.to_s
    sequence_offset = sequence.offset.to_i
    offset = 0
    while text[(sequence_offset + offset)..(sequence_offset + offset + sequence_str.length - 1)] != sequence_str and
      not offset + sequence_offset + sequence_str.length > text.length

      offset += 1
    end

    next if offset + sequence_offset + sequence_str.length > text.length

    if memm
      entities = @@MEMM.findNEs(sequence, text) 
      keys = entities.keySet.iterator
    else
      entities = @@DFA.getNEs(sequence)
      keys = entities.iterator
    end

    while keys.hasNext do
      key = keys.next
      mention_type, rstart, rend, mention = key.to_string.match(/\[NE:(.*):(.*):(.*):(.*)\]/).values_at(1,2,3,4)
      next unless type.nil? or type.include? mention_type
      score  = memm ? entities.get(key).to_string.to_f : nil

      NamedEntity.setup mention, :offset => rstart.to_i + offset, :entity_type => mention_type, :score => score
      
      mentions << mention unless mentions.collect{|m| m.to_s}.include? mention.to_s
    end
  end

  mentions
end

Instance Method Details

#match(*args) ⇒ Object 



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# File 'lib/rbbt/ner/oscar3.rb', line 63

def match(*args)
  OSCAR3.match *args
end