C++ (Cpp) InputPath::GetPrevPath Examples

Example #1

File: PhraseDictionaryOnDisk.cpp Project: NickRuiz/mosesdecoder

void PhraseDictionaryOnDisk::GetTargetPhraseCollectionBatch(InputPath &inputPath) const
{
  OnDiskPt::OnDiskWrapper &wrapper = const_cast<OnDiskPt::OnDiskWrapper&>(GetImplementation());
  const Phrase &phrase = inputPath.GetPhrase();
  const InputPath *prevInputPath = inputPath.GetPrevPath();

  const OnDiskPt::PhraseNode *prevPtNode = NULL;

  if (prevInputPath) {
    prevPtNode = static_cast<const OnDiskPt::PhraseNode*>(prevInputPath->GetPtNode(*this));
  } else {
    // Starting subphrase.
    assert(phrase.GetSize() == 1);
    prevPtNode = &wrapper.GetRootSourceNode();
  }

  // backoff
  if (!SatisfyBackoff(inputPath)) {
    return;
  }

  if (prevPtNode) {
    Word lastWord = phrase.GetWord(phrase.GetSize() - 1);
    lastWord.OnlyTheseFactors(m_inputFactors);
    OnDiskPt::Word *lastWordOnDisk = wrapper.ConvertFromMoses(m_input, lastWord);

    if (lastWordOnDisk == NULL) {
      // OOV according to this phrase table. Not possible to extend
      inputPath.SetTargetPhrases(*this, NULL, NULL);
    } else {
      const OnDiskPt::PhraseNode *ptNode = prevPtNode->GetChild(*lastWordOnDisk, wrapper);
      if (ptNode) {
        const TargetPhraseCollection *targetPhrases = GetTargetPhraseCollection(ptNode);
        inputPath.SetTargetPhrases(*this, targetPhrases, ptNode);
      } else {
        inputPath.SetTargetPhrases(*this, NULL, NULL);
      }

      delete lastWordOnDisk;
    }
  }
}