C++ TargetPhrase::AddWord方法代码示例

std::vector<TargetPhrase*> PhraseDictionaryTransliteration::CreateTargetPhrases(const Phrase &sourcePhrase, const string &outDir) const
{
	std::vector<TargetPhrase*> ret;

	string outPath = outDir + "/out.txt";
	ifstream outStream(outPath.c_str());

	string line;
	while (getline(outStream, line)) {
		vector<string> toks;
		Tokenize(toks, line, "\t");
		UTIL_THROW_IF2(toks.size() != 2, "Error in transliteration output file. Expecting word\tscore");

	  TargetPhrase *tp = new TargetPhrase();
	  Word &word = tp->AddWord();
	  word.CreateFromString(Output, m_output, toks[0], false);

	  float score = Scan<float>(toks[1]);
	  tp->GetScoreBreakdown().PlusEquals(this, score);

	  // score of all other ff when this rule is being loaded
	  tp->Evaluate(sourcePhrase, GetFeaturesToApply());

	  ret.push_back(tp);
	}

	outStream.close();

  return ret;
}

TargetPhrase* BilingualDynSuffixArray::GetMosesFactorIDs(const SAPhrase& phrase) const 
{
	TargetPhrase* targetPhrase = new TargetPhrase(Output);
	for(size_t i=0; i < phrase.words.size(); ++i) { // look up trg words
		Word& word = m_vocab->GetWord( phrase.words[i]);
		assert(word != m_vocab->GetkOOVWord());
		targetPhrase->AddWord(word);
	}
	
	// scoring
	return targetPhrase;
}

TargetPhrase*
BilingualDynSuffixArray::
GetMosesFactorIDs(const SAPhrase& phrase, const Phrase& sourcePhrase) const
{
  TargetPhrase* targetPhrase = new TargetPhrase();
  for(size_t i=0; i < phrase.words.size(); ++i) { // look up trg words
    Word& word = m_trgVocab->GetWord( phrase.words[i]);
    CHECK(word != m_trgVocab->GetkOOVWord());
    targetPhrase->AddWord(word);
  }
  targetPhrase->SetSourcePhrase(sourcePhrase);
  // scoring
  return targetPhrase;
}

TargetPhrase*
BilingualDynSuffixArray::
GetMosesFactorIDs(const SAPhrase& phrase, const Phrase& sourcePhrase) const
{
  TargetPhrase* targetPhrase = new TargetPhrase();
  for(size_t i=0; i < phrase.words.size(); ++i) { // look up trg words
    Word& word = m_trgVocab->GetWord( phrase.words[i]);
    UTIL_THROW_IF2(word == m_trgVocab->GetkOOVWord(),
    		"Unknown word at position " << i);
    targetPhrase->AddWord(word);
  }
  // scoring
  return targetPhrase;
}

TargetPhrase *SkeletonPT::CreateTargetPhrase(const Phrase &sourcePhrase) const
{
  // create a target phrase from the 1st word of the source, prefix with 'SkeletonPT:'
  CHECK(sourcePhrase.GetSize());
  CHECK(m_output.size() == 1);

  string str = sourcePhrase.GetWord(0).GetFactor(0)->GetString().as_string();
  str = "SkeletonPT:" + str;

  TargetPhrase *tp = new TargetPhrase();
  Word &word = tp->AddWord();
  word.CreateFromString(Output, m_output, str, false);

  // score for this phrase table
  vector<float> scores(m_numScoreComponents, 1.3);
  tp->GetScoreBreakdown().PlusEquals(this, scores);

  // score of all other ff when this rule is being loaded
  tp->Evaluate(sourcePhrase, GetFeaturesToApply());

  return tp;
}

//.........这里部分代码省略.........
          else if (type == 2)
          {
            size_t rank = DecodeREncSymbol2Rank(symbol);
            size_t srcPos = DecodeREncSymbol2Position(symbol);
            
            if(srcPos >= sourceWords.size())
              return TargetPhraseVectorPtr();  
            
            wordString = GetTargetSymbol(GetTranslation(sourceWords[srcPos], rank));
            if(m_phraseDictionary.m_useAlignmentInfo)
            {
              size_t trgPos = targetPhrase->GetSize();
              alignment.insert(AlignPoint(srcPos, trgPos));
            }
          }
          else if(type == 3)
          {
            size_t rank = DecodeREncSymbol3(symbol);
            size_t srcPos = targetPhrase->GetSize();
            
            if(srcPos >= sourceWords.size())
              return TargetPhraseVectorPtr();  
                            
            wordString = GetTargetSymbol(GetTranslation(sourceWords[srcPos], rank));   
            if(m_phraseDictionary.m_useAlignmentInfo)
            {
              size_t trgPos = srcPos;
              alignment.insert(AlignPoint(srcPos, trgPos));
            }
          }
          
          Word word;
          word.CreateFromString(Output, *m_output, wordString, false);
          targetPhrase->AddWord(word);
        }
        else if(m_coding == PREnc)
        {
          // if the symbol is just a word
          if(GetPREncType(symbol) == 1)
          {
            unsigned decodedSymbol = DecodePREncSymbol1(symbol);
     
            Word word;
            word.CreateFromString(Output, *m_output,
                                  GetTargetSymbol(decodedSymbol), false);
            targetPhrase->AddWord(word);
          }
          // if the symbol is a subphrase pointer
          else
          {
            int left = DecodePREncSymbol2Left(symbol);
            int right = DecodePREncSymbol2Right(symbol);
            unsigned rank = DecodePREncSymbol2Rank(symbol);
            
            int srcStart = left + targetPhrase->GetSize();
            int srcEnd   = srcSize - right - 1;
            
            // false positive consistency check
            if(0 > srcStart || srcStart > srcEnd || unsigned(srcEnd) >= srcSize)
              return TargetPhraseVectorPtr();
            
            // false positive consistency check
            if(m_maxRank && rank > m_maxRank)
                return TargetPhraseVectorPtr();
            
            // set subphrase by default to itself

void ChartParserUnknown::Process(const Word &sourceWord, const WordsRange &range, ChartParserCallback &to)
{
  // unknown word, add as trans opt
  const StaticData &staticData = StaticData::Instance();
  const UnknownWordPenaltyProducer &unknownWordPenaltyProducer = UnknownWordPenaltyProducer::Instance();

  size_t isDigit = 0;
  if (staticData.GetDropUnknown()) {
    const Factor *f = sourceWord[0]; // TODO hack. shouldn't know which factor is surface
    const StringPiece s = f->GetString();
    isDigit = s.find_first_of("0123456789");
    if (isDigit == string::npos)
      isDigit = 0;
    else
      isDigit = 1;
    // modify the starting bitmap
  }

  Phrase* unksrc = new Phrase(1);
  unksrc->AddWord() = sourceWord;
  Word &newWord = unksrc->GetWord(0);
  newWord.SetIsOOV(true);

  m_unksrcs.push_back(unksrc);

  //TranslationOption *transOpt;
  if (! staticData.GetDropUnknown() || isDigit) {
    // loop
    const UnknownLHSList &lhsList = staticData.GetUnknownLHS();
    UnknownLHSList::const_iterator iterLHS;
    for (iterLHS = lhsList.begin(); iterLHS != lhsList.end(); ++iterLHS) {
      const string &targetLHSStr = iterLHS->first;
      float prob = iterLHS->second;

      // lhs
      //const Word &sourceLHS = staticData.GetInputDefaultNonTerminal();
      Word *targetLHS = new Word(true);

      targetLHS->CreateFromString(Output, staticData.GetOutputFactorOrder(), targetLHSStr, true);
      UTIL_THROW_IF2(targetLHS->GetFactor(0) == NULL, "Null factor for target LHS");

      // add to dictionary
      TargetPhrase *targetPhrase = new TargetPhrase();
      Word &targetWord = targetPhrase->AddWord();
      targetWord.CreateUnknownWord(sourceWord);

      // scores
      float unknownScore = FloorScore(TransformScore(prob));

      targetPhrase->GetScoreBreakdown().Assign(&unknownWordPenaltyProducer, unknownScore);
      targetPhrase->Evaluate(*unksrc);

      targetPhrase->SetTargetLHS(targetLHS);
      targetPhrase->SetAlignmentInfo("0-0");
      if (staticData.IsDetailedTreeFragmentsTranslationReportingEnabled()) {
        targetPhrase->SetProperty("Tree","[ " + (*targetLHS)[0]->GetString().as_string() + " "+sourceWord[0]->GetString().as_string()+" ]");
      }

      // chart rule
      to.AddPhraseOOV(*targetPhrase, m_cacheTargetPhraseCollection, range);
    } // for (iterLHS
  } else {
    // drop source word. create blank trans opt
    float unknownScore = FloorScore(-numeric_limits<float>::infinity());

    TargetPhrase *targetPhrase = new TargetPhrase();
    // loop
    const UnknownLHSList &lhsList = staticData.GetUnknownLHS();
    UnknownLHSList::const_iterator iterLHS;
    for (iterLHS = lhsList.begin(); iterLHS != lhsList.end(); ++iterLHS) {
      const string &targetLHSStr = iterLHS->first;
      //float prob = iterLHS->second;

      Word *targetLHS = new Word(true);
      targetLHS->CreateFromString(Output, staticData.GetOutputFactorOrder(), targetLHSStr, true);
      UTIL_THROW_IF2(targetLHS->GetFactor(0) == NULL, "Null factor for target LHS");

      targetPhrase->GetScoreBreakdown().Assign(&unknownWordPenaltyProducer, unknownScore);
      targetPhrase->Evaluate(*unksrc);

      targetPhrase->SetTargetLHS(targetLHS);

      // chart rule
      to.AddPhraseOOV(*targetPhrase, m_cacheTargetPhraseCollection, range);
    }
  }
}