Esempio n. 1
0
//TODO this should be a factory function!
TranslationOption::TranslationOption(const WordsRange &wordsRange
																		 , const TargetPhrase &targetPhrase
																		 , const InputType &inputType
																		 , int /*whatever*/)
: m_targetPhrase(targetPhrase)
, m_sourceWordsRange	(wordsRange)
, m_futureScore(0)
{
	const UnknownWordPenaltyProducer *up = StaticData::Instance().GetUnknownWordPenaltyProducer();
  if (up) {
		const ScoreProducer *scoreProducer = (const ScoreProducer *)up; // not sure why none of the c++ cast works
		vector<float> score(1);
		score[0] = FloorScore(-numeric_limits<float>::infinity());
		m_scoreBreakdown.Assign(scoreProducer, score);
	}

	if (inputType.GetType() == SentenceInput)
	{
		Phrase phrase = inputType.GetSubString(wordsRange);
		m_sourcePhrase = new Phrase(phrase);
	}
	else
	{ // TODO lex reordering with confusion network
		m_sourcePhrase = new Phrase(*targetPhrase.GetSourcePhrase());
		//the target phrase from a confusion network/lattice has input scores that we want to keep
		m_scoreBreakdown.PlusEquals(targetPhrase.GetScoreBreakdown());

	}
}
Esempio n. 2
0
void ChartParser::CreateInputPaths(const InputType &input)
{
  size_t size = input.GetSize();
  m_inputPathMatrix.resize(size);

  UTIL_THROW_IF2(input.GetType() != SentenceInput && input.GetType() != TreeInputType,
		  "Input must be a sentence or a tree, not lattice or confusion networks");
  for (size_t phaseSize = 1; phaseSize <= size; ++phaseSize) {
    for (size_t startPos = 0; startPos < size - phaseSize + 1; ++startPos) {
      size_t endPos = startPos + phaseSize -1;
      vector<InputPath*> &vec = m_inputPathMatrix[startPos];

      WordsRange range(startPos, endPos);
      Phrase subphrase(input.GetSubString(WordsRange(startPos, endPos)));
      const NonTerminalSet &labels = input.GetLabelSet(startPos, endPos);

      InputPath *node;
      if (range.GetNumWordsCovered() == 1) {
        node = new InputPath(subphrase, labels, range, NULL, NULL);
        vec.push_back(node);
      } else {
        const InputPath &prevNode = GetInputPath(startPos, endPos - 1);
        node = new InputPath(subphrase, labels, range, &prevNode, NULL);
        vec.push_back(node);
      }

      //m_inputPathQueue.push_back(node);
    }
  }
}
Esempio n. 3
0
//TODO this should be a factory function!
TranslationOption::TranslationOption(const WordsRange &wordsRange
																		, const TargetPhrase &targetPhrase
																		, const InputType &inputType)
: m_targetPhrase(targetPhrase)
, m_sourceWordsRange(wordsRange)
{
	// set score
	m_scoreBreakdown.PlusEquals(targetPhrase.GetScoreBreakdown());

	if (inputType.GetType() == SentenceInput)
	{
		Phrase phrase = inputType.GetSubString(wordsRange);
		m_sourcePhrase = new Phrase(phrase);
	}
	else
	{ // TODO lex reordering with confusion network
		m_sourcePhrase = new Phrase(*targetPhrase.GetSourcePhrase());
	}
}