mosesdecoder/moses/IOWrapper.cpp

// $Id$

/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (c) 2006 University of Edinburgh
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
			this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
			this list of conditions and the following disclaimer in the documentation
			and/or other materials provided with the distribution.
 * Neither the name of the University of Edinburgh nor the names of its contributors
			may be used to endorse or promote products derived from this software
			without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
 ***********************************************************************/

// example file on how to use moses library

#include <iostream>
#include <stack>
#include <boost/algorithm/string.hpp>

#include "moses/TypeDef.h"
#include "moses/Util.h"
#include "moses/Hypothesis.h"
#include "moses/WordsRange.h"
#include "moses/TrellisPathList.h"
#include "moses/StaticData.h"
#include "moses/FeatureVector.h"
#include "moses/InputFileStream.h"
#include "moses/FF/StatefulFeatureFunction.h"
#include "moses/FF/StatelessFeatureFunction.h"
#include "util/exception.hh"

#include "IOWrapper.h"

using namespace std;
using namespace Moses;

namespace MosesCmd
{

IOWrapper::IOWrapper(const std::vector<FactorType>	&inputFactorOrder
                     , const std::vector<FactorType>	&outputFactorOrder
                     , const FactorMask							&inputFactorUsed
                     , size_t												nBestSize
                     , const std::string							&nBestFilePath
                     , const std::string							&inputFilePath)
  :m_inputFactorOrder(inputFactorOrder)
  ,m_outputFactorOrder(outputFactorOrder)
  ,m_inputFactorUsed(inputFactorUsed)
  ,m_inputFilePath(inputFilePath)
  ,m_nBestStream(NULL)

  ,m_outputWordGraphStream(NULL)
  ,m_outputSearchGraphStream(NULL)
  ,m_detailedTranslationReportingStream(NULL)
  ,m_unknownsStream(NULL)
  ,m_alignmentInfoStream(NULL)

  ,m_singleBestOutputCollector(NULL)
  ,m_nBestOutputCollector(NULL)
  ,m_unknownsCollector(NULL)
  ,m_alignmentInfoCollector(NULL)
  ,m_searchGraphOutputCollector(NULL)
  ,m_detailedTranslationCollector(NULL)
  ,m_wordGraphCollector(NULL)
{
  const StaticData &staticData = StaticData::Instance();

  bool suppressSingleBestOutput = false;

  if (inputFilePath.empty()) {
	m_inputFile = NULL;
	m_inputStream = &cin;
  }
  else {
    m_inputFile = new InputFileStream(inputFilePath);
    m_inputStream = m_inputFile;
  }

  if (nBestSize > 0) {
    if (nBestFilePath == "-" || nBestFilePath == "/dev/stdout") {
      m_nBestStream = &std::cout;
      m_surpressSingleBestOutput = true;
    } else {
      std::ofstream *file = new std::ofstream;
      m_nBestStream = file;
      file->open(nBestFilePath.c_str());
    }
  }

  // search graph output
  if (staticData.GetOutputSearchGraph()) {
    string fileName;
    if (staticData.GetOutputSearchGraphExtended())
      fileName = staticData.GetParam("output-search-graph-extended")[0];
    else
      fileName = staticData.GetParam("output-search-graph")[0];
    std::ofstream *file = new std::ofstream;
    m_outputSearchGraphStream = file;
    file->open(fileName.c_str());
  }

  if (nBestSize > 0) {
    if (nBestFilePath == "-") {
      m_nBestOutputCollector = new Moses::OutputCollector(&std::cout);
      suppressSingleBestOutput = true;
    } else {
      m_nBestOutputCollector = new Moses::OutputCollector(new std::ofstream(nBestFilePath.c_str()));
      m_nBestOutputCollector->HoldOutputStream();
    }
  }

  if (!suppressSingleBestOutput) {
    m_singleBestOutputCollector = new Moses::OutputCollector(&std::cout);
  }

  if (!staticData.GetOutputUnknownsFile().empty()) {
    m_unknownsStream = new std::ofstream(staticData.GetOutputUnknownsFile().c_str());
    m_unknownsCollector = new Moses::OutputCollector(m_unknownsStream);
    UTIL_THROW_IF2(!m_unknownsStream->good(),
                   "File for unknowns words could not be opened: " <<
                     staticData.GetOutputUnknownsFile());
  }

  if (!staticData.GetAlignmentOutputFile().empty()) {
    m_alignmentInfoStream = new std::ofstream(staticData.GetAlignmentOutputFile().c_str());
    m_alignmentInfoCollector = new Moses::OutputCollector(m_alignmentInfoStream);
    UTIL_THROW_IF2(!m_alignmentInfoStream->good(),
    		"File for alignment output could not be opened: " << staticData.GetAlignmentOutputFile());
  }

  if (staticData.GetOutputSearchGraph()) {
    string fileName = staticData.GetParam("output-search-graph")[0];
    std::ofstream *file = new std::ofstream;
    m_outputSearchGraphStream = file;
    file->open(fileName.c_str());
    m_searchGraphOutputCollector = new Moses::OutputCollector(m_outputSearchGraphStream);
  }

  // detailed translation reporting
  if (staticData.IsDetailedTranslationReportingEnabled()) {
    const std::string &path = staticData.GetDetailedTranslationReportingFilePath();
    m_detailedTranslationReportingStream = new std::ofstream(path.c_str());
    m_detailedTranslationCollector = new Moses::OutputCollector(m_detailedTranslationReportingStream);
  }

  // wordgraph output
  if (staticData.GetOutputWordGraph()) {
    string fileName = staticData.GetParam("output-word-graph")[0];
    std::ofstream *file = new std::ofstream;
    m_outputWordGraphStream  = file;
    file->open(fileName.c_str());
    m_wordGraphCollector = new OutputCollector(m_outputWordGraphStream);
  }

}

IOWrapper::~IOWrapper()
{
  if (m_inputFile != NULL)
    delete m_inputFile;
  if (m_nBestStream != NULL && !m_surpressSingleBestOutput) {
    // outputting n-best to file, rather than stdout. need to close file and delete obj
    delete m_nBestStream;
  }

  delete m_detailedTranslationReportingStream;
  delete m_alignmentInfoStream;
  delete m_unknownsStream;
  delete m_outputSearchGraphStream;
  delete m_outputWordGraphStream;

  delete m_singleBestOutputCollector;
  delete m_nBestOutputCollector;
  delete m_alignmentInfoCollector;
  delete m_searchGraphOutputCollector;
  delete m_detailedTranslationCollector;
  delete m_wordGraphCollector;
}

InputType*
IOWrapper::
GetInput(InputType* inputType)
{
  if(inputType->Read(*m_inputStream, m_inputFactorOrder)) {
    if (long x = inputType->GetTranslationId()) {
      if (x>=m_translationId) m_translationId = x+1;
    } else inputType->SetTranslationId(m_translationId++);

    return inputType;
  } else {
    delete inputType;
    return NULL;
  }
}

std::map<size_t, const Factor*> GetPlaceholders(const Hypothesis &hypo, FactorType placeholderFactor)
{
  const InputPath &inputPath = hypo.GetTranslationOption().GetInputPath();
  const Phrase &inputPhrase = inputPath.GetPhrase();

  std::map<size_t, const Factor*> ret;

  for (size_t sourcePos = 0; sourcePos < inputPhrase.GetSize(); ++sourcePos) {
    const Factor *factor = inputPhrase.GetFactor(sourcePos, placeholderFactor);
    if (factor) {
      std::set<size_t> targetPos = hypo.GetTranslationOption().GetTargetPhrase().GetAlignTerm().GetAlignmentsForSource(sourcePos);
      UTIL_THROW_IF2(targetPos.size() != 1,
    		  "Placeholder should be aligned to 1, and only 1, word");
      ret[*targetPos.begin()] = factor;
    }
  }

  return ret;
}

/***
 * print surface factor only for the given phrase
 */
void OutputSurface(std::ostream &out, const Hypothesis &edge, const std::vector<FactorType> &outputFactorOrder,
                   char reportSegmentation, bool reportAllFactors)
{
  UTIL_THROW_IF2(outputFactorOrder.size() == 0,
		  "Must specific at least 1 output factor");
  const TargetPhrase& phrase = edge.GetCurrTargetPhrase();
  bool markUnknown = StaticData::Instance().GetMarkUnknown();
  if (reportAllFactors == true) {
    out << phrase;
  } else {
    FactorType placeholderFactor = StaticData::Instance().GetPlaceholderFactor();

    std::map<size_t, const Factor*> placeholders;
    if (placeholderFactor != NOT_FOUND) {
      // creates map of target position -> factor for placeholders
      placeholders = GetPlaceholders(edge, placeholderFactor);
    }

    size_t size = phrase.GetSize();
    for (size_t pos = 0 ; pos < size ; pos++) {
      const Factor *factor = phrase.GetFactor(pos, outputFactorOrder[0]);

      if (placeholders.size()) {
        // do placeholders
        std::map<size_t, const Factor*>::const_iterator iter = placeholders.find(pos);
        if (iter != placeholders.end()) {
          factor = iter->second;
        }
      }

      UTIL_THROW_IF2(factor == NULL,
    		  "No factor 0 at position " << pos);

      //preface surface form with UNK if marking unknowns
      const Word &word = phrase.GetWord(pos);
      if(markUnknown && word.IsOOV()) {
        out << "UNK" << *factor;
      } else {
        out << *factor;
      }

      for (size_t i = 1 ; i < outputFactorOrder.size() ; i++) {
        const Factor *factor = phrase.GetFactor(pos, outputFactorOrder[i]);
        UTIL_THROW_IF2(factor == NULL,
      		  "No factor " << i << " at position " << pos);

        out << "|" << *factor;
      }
      out << " ";
    }
  }

  // trace ("report segmentation") option "-t" / "-tt"
  if (reportSegmentation > 0 && phrase.GetSize() > 0) {
    const WordsRange &sourceRange = edge.GetCurrSourceWordsRange();
    const int sourceStart = sourceRange.GetStartPos();
    const int sourceEnd = sourceRange.GetEndPos();
    out << "|" << sourceStart << "-" << sourceEnd;    // enriched "-tt"
    if (reportSegmentation == 2) {
      out << ",wa=";
      const AlignmentInfo &ai = edge.GetCurrTargetPhrase().GetAlignTerm();
      OutputAlignment(out, ai, 0, 0);
      out << ",total=";
      out << edge.GetScore() - edge.GetPrevHypo()->GetScore();
      out << ",";
      ScoreComponentCollection scoreBreakdown(edge.GetScoreBreakdown());
      scoreBreakdown.MinusEquals(edge.GetPrevHypo()->GetScoreBreakdown());
      OutputAllFeatureScores(scoreBreakdown, out);
    }
    out << "| ";
  }
}

void OutputBestSurface(std::ostream &out, const Hypothesis *hypo, const std::vector<FactorType> &outputFactorOrder,
                       char reportSegmentation, bool reportAllFactors)
{
  if (hypo != NULL) {
    // recursively retrace this best path through the lattice, starting from the end of the hypothesis sentence
    OutputBestSurface(out, hypo->GetPrevHypo(), outputFactorOrder, reportSegmentation, reportAllFactors);
    OutputSurface(out, *hypo, outputFactorOrder, reportSegmentation, reportAllFactors);
  }
}

void OutputAlignment(ostream &out, const AlignmentInfo &ai, size_t sourceOffset, size_t targetOffset)
{
  typedef std::vector< const std::pair<size_t,size_t>* > AlignVec;
  AlignVec alignments = ai.GetSortedAlignments();

  AlignVec::const_iterator it;
  for (it = alignments.begin(); it != alignments.end(); ++it) {
    const std::pair<size_t,size_t> &alignment = **it;
    out << alignment.first + sourceOffset << "-" << alignment.second + targetOffset << " ";
  }

}

void OutputAlignment(ostream &out, const vector<const Hypothesis *> &edges)
{
  size_t targetOffset = 0;

  for (int currEdge = (int)edges.size() - 1 ; currEdge >= 0 ; currEdge--) {
    const Hypothesis &edge = *edges[currEdge];
    const TargetPhrase &tp = edge.GetCurrTargetPhrase();
    size_t sourceOffset = edge.GetCurrSourceWordsRange().GetStartPos();

    OutputAlignment(out, tp.GetAlignTerm(), sourceOffset, targetOffset);

    targetOffset += tp.GetSize();
  }
  out << std::endl;
}

void OutputAlignment(std::ostream &out, const Moses::Hypothesis *hypo)
{
  std::vector<const Hypothesis *> edges;
  const Hypothesis *currentHypo = hypo;
  while (currentHypo) {
    edges.push_back(currentHypo);
    currentHypo = currentHypo->GetPrevHypo();
  }

  OutputAlignment(out, edges);

}

void OutputAlignment(OutputCollector* collector, size_t lineNo , const vector<const Hypothesis *> &edges)
{
  ostringstream out;
  OutputAlignment(out, edges);

  collector->Write(lineNo,out.str());
}

void OutputAlignment(OutputCollector* collector, size_t lineNo , const Hypothesis *hypo)
{
  if (collector) {
    std::vector<const Hypothesis *> edges;
    const Hypothesis *currentHypo = hypo;
    while (currentHypo) {
      edges.push_back(currentHypo);
      currentHypo = currentHypo->GetPrevHypo();
    }

    OutputAlignment(collector,lineNo, edges);
  }
}

void OutputAlignment(OutputCollector* collector, size_t lineNo , const TrellisPath &path)
{
  if (collector) {
    OutputAlignment(collector,lineNo, path.GetEdges());
  }
}

void OutputBestHypo(const Moses::TrellisPath &path, long /*translationId*/, char reportSegmentation, bool reportAllFactors, std::ostream &out)
{
  const std::vector<const Hypothesis *> &edges = path.GetEdges();

  for (int currEdge = (int)edges.size() - 1 ; currEdge >= 0 ; currEdge--) {
    const Hypothesis &edge = *edges[currEdge];
    OutputSurface(out, edge, StaticData::Instance().GetOutputFactorOrder(), reportSegmentation, reportAllFactors);
  }
  out << endl;
}

void IOWrapper::Backtrack(const Hypothesis *hypo)
{

  if (hypo->GetPrevHypo() != NULL) {
    VERBOSE(3,hypo->GetId() << " <= ");
    Backtrack(hypo->GetPrevHypo());
  }
}

void OutputBestHypo(const std::vector<Word>&  mbrBestHypo, long /*translationId*/, char /*reportSegmentation*/, bool /*reportAllFactors*/, ostream& out)
{

  for (size_t i = 0 ; i < mbrBestHypo.size() ; i++) {
    const Factor *factor = mbrBestHypo[i].GetFactor(StaticData::Instance().GetOutputFactorOrder()[0]);
    UTIL_THROW_IF2(factor == NULL,
  		  "No factor 0 at position " << i);
    if (i>0) out << " " << *factor;
    else     out << *factor;
  }
  out << endl;
}


void OutputInput(std::vector<const Phrase*>& map, const Hypothesis* hypo)
{
  if (hypo->GetPrevHypo()) {
    OutputInput(map, hypo->GetPrevHypo());
    map[hypo->GetCurrSourceWordsRange().GetStartPos()] = &hypo->GetTranslationOption().GetInputPath().GetPhrase();
  }
}

void OutputInput(std::ostream& os, const Hypothesis* hypo)
{
  size_t len = hypo->GetInput().GetSize();
  std::vector<const Phrase*> inp_phrases(len, 0);
  OutputInput(inp_phrases, hypo);
  for (size_t i=0; i<len; ++i)
    if (inp_phrases[i]) os << *inp_phrases[i];
}

void IOWrapper::OutputBestHypo(const Hypothesis *hypo, long /*translationId*/, char reportSegmentation, bool reportAllFactors)
{
  if (hypo != NULL) {
    VERBOSE(1,"BEST TRANSLATION: " << *hypo << endl);
    VERBOSE(3,"Best path: ");
    Backtrack(hypo);
    VERBOSE(3,"0" << std::endl);
    if (!m_surpressSingleBestOutput) {
      if (StaticData::Instance().GetOutputHypoScore()) {
        cout << hypo->GetTotalScore() << " ";
      }

      if (StaticData::Instance().IsPathRecoveryEnabled()) {
        OutputInput(cout, hypo);
        cout << "||| ";
      }
      OutputBestSurface(cout, hypo, m_outputFactorOrder, reportSegmentation, reportAllFactors);
      cout << endl;
    }
  } else {
    VERBOSE(1, "NO BEST TRANSLATION" << endl);
    if (!m_surpressSingleBestOutput) {
      cout << endl;
    }
  }
}

void OutputNBest(std::ostream& out
                 , const Moses::TrellisPathList &nBestList
                 , const std::vector<Moses::FactorType>& outputFactorOrder
                 , long translationId
                 , char reportSegmentation)
{
  const StaticData &staticData = StaticData::Instance();
  bool reportAllFactors = staticData.GetReportAllFactorsNBest();
  bool includeSegmentation = staticData.NBestIncludesSegmentation();
  bool includeWordAlignment = staticData.PrintAlignmentInfoInNbest();

  TrellisPathList::const_iterator iter;
  for (iter = nBestList.begin() ; iter != nBestList.end() ; ++iter) {
    const TrellisPath &path = **iter;
    const std::vector<const Hypothesis *> &edges = path.GetEdges();

    // print the surface factor of the translation
    out << translationId << " ||| ";
    for (int currEdge = (int)edges.size() - 1 ; currEdge >= 0 ; currEdge--) {
      const Hypothesis &edge = *edges[currEdge];
      OutputSurface(out, edge, outputFactorOrder, reportSegmentation, reportAllFactors);
    }
    out << " |||";

    // print scores with feature names
    OutputAllFeatureScores(path.GetScoreBreakdown(), out );

    // total
    out << " ||| " << path.GetTotalScore();

    //phrase-to-phrase segmentation
    if (includeSegmentation) {
      out << " |||";
      for (int currEdge = (int)edges.size() - 2 ; currEdge >= 0 ; currEdge--) {
        const Hypothesis &edge = *edges[currEdge];
        const WordsRange &sourceRange = edge.GetCurrSourceWordsRange();
        WordsRange targetRange = path.GetTargetWordsRange(edge);
        out << " " << sourceRange.GetStartPos();
        if (sourceRange.GetStartPos() < sourceRange.GetEndPos()) {
          out << "-" << sourceRange.GetEndPos();
        }
        out<< "=" << targetRange.GetStartPos();
        if (targetRange.GetStartPos() < targetRange.GetEndPos()) {
          out<< "-" << targetRange.GetEndPos();
        }
      }
    }

    if (includeWordAlignment) {
      out << " ||| ";
      for (int currEdge = (int)edges.size() - 2 ; currEdge >= 0 ; currEdge--) {
        const Hypothesis &edge = *edges[currEdge];
        const WordsRange &sourceRange = edge.GetCurrSourceWordsRange();
        WordsRange targetRange = path.GetTargetWordsRange(edge);
        const int sourceOffset = sourceRange.GetStartPos();
        const int targetOffset = targetRange.GetStartPos();
        const AlignmentInfo &ai = edge.GetCurrTargetPhrase().GetAlignTerm();

        OutputAlignment(out, ai, sourceOffset, targetOffset);

      }
    }

    if (StaticData::Instance().IsPathRecoveryEnabled()) {
      out << " ||| ";
      OutputInput(out, edges[0]);
    }

    out << endl;
  }

  out << std::flush;
}

void OutputAllFeatureScores(const Moses::ScoreComponentCollection &features
                            , std::ostream &out)
{
  std::string lastName = "";
  const vector<const StatefulFeatureFunction*>& sff = StatefulFeatureFunction::GetStatefulFeatureFunctions();
  for( size_t i=0; i<sff.size(); i++ ) {
    const StatefulFeatureFunction *ff = sff[i];
    if (ff->GetScoreProducerDescription() != "BleuScoreFeature"
        && ff->IsTuneable()) {
      OutputFeatureScores( out, features, ff, lastName );
    }
  }
  const vector<const StatelessFeatureFunction*>& slf = StatelessFeatureFunction::GetStatelessFeatureFunctions();
  for( size_t i=0; i<slf.size(); i++ ) {
    const StatelessFeatureFunction *ff = slf[i];
    if (ff->IsTuneable()) {
      OutputFeatureScores( out, features, ff, lastName );
    }
  }
}

void OutputFeatureScores( std::ostream& out
                          , const ScoreComponentCollection &features
                          , const FeatureFunction *ff
                          , std::string &lastName )
{
  const StaticData &staticData = StaticData::Instance();
  bool labeledOutput = staticData.IsLabeledNBestList();

  // regular features (not sparse)
  if (ff->GetNumScoreComponents() != 0) {
    if( labeledOutput && lastName != ff->GetScoreProducerDescription() ) {
      lastName = ff->GetScoreProducerDescription();
      out << " " << lastName << "=";
    }
    vector<float> scores = features.GetScoresForProducer( ff );
    for (size_t j = 0; j<scores.size(); ++j) {
      out << " " << scores[j];
    }
  }

  // sparse features
  const FVector scores = features.GetVectorForProducer( ff );
  for(FVector::FNVmap::const_iterator i = scores.cbegin(); i != scores.cend(); i++) {
    out << " " << i->first << "= " << i->second;
  }
}

void OutputLatticeMBRNBest(std::ostream& out, const vector<LatticeMBRSolution>& solutions,long translationId)
{
  for (vector<LatticeMBRSolution>::const_iterator si = solutions.begin(); si != solutions.end(); ++si) {
    out << translationId;
    out << " |||";
    const vector<Word> mbrHypo = si->GetWords();
    for (size_t i = 0 ; i < mbrHypo.size() ; i++) {
      const Factor *factor = mbrHypo[i].GetFactor(StaticData::Instance().GetOutputFactorOrder()[0]);
      if (i>0) out << " " << *factor;
      else     out << *factor;
    }
    out << " |||";
    out << " map: " << si->GetMapScore();
    out << " w: " << mbrHypo.size();
    const vector<float>& ngramScores = si->GetNgramScores();
    for (size_t i = 0; i < ngramScores.size(); ++i) {
      out << " " << ngramScores[i];
    }
    out << " ||| " << si->GetScore();

    out << endl;
  }
}


void IOWrapper::OutputLatticeMBRNBestList(const vector<LatticeMBRSolution>& solutions,long translationId)
{
  OutputLatticeMBRNBest(*m_nBestStream, solutions,translationId);
}

bool ReadInput(IOWrapper &ioWrapper, InputTypeEnum inputType, InputType*& source)
{
  if (source) delete source;
  switch(inputType) {
  case SentenceInput:
    source = ioWrapper.GetInput(new Sentence);
    break;
  case ConfusionNetworkInput:
    source = ioWrapper.GetInput(new ConfusionNet);
    break;
  case WordLatticeInput:
    source = ioWrapper.GetInput(new WordLattice);
    break;
  default:
    TRACE_ERR("Unknown input type: " << inputType << "\n");
    source = NULL;
  }
  return (source ? true : false);
}



IOWrapper *GetIOWrapper(const StaticData &staticData)
{
  IOWrapper *ioWrapper;
  const std::vector<FactorType> &inputFactorOrder = staticData.GetInputFactorOrder()
      ,&outputFactorOrder = staticData.GetOutputFactorOrder();
  FactorMask inputFactorUsed(inputFactorOrder);

  // io
  string inputPath;
  if (staticData.GetParam("input-file").size() == 1) {
    VERBOSE(2,"IO from File" << endl);
    inputPath = staticData.GetParam("input-file")[0];
  }
  ioWrapper = new IOWrapper(inputFactorOrder, outputFactorOrder, inputFactorUsed
                            , staticData.GetNBestSize()
                            , staticData.GetNBestFilePath()
                            , inputPath);
  ioWrapper->ResetTranslationId();

  IFVERBOSE(1)
  PrintUserTime("Created input-output object");

  return ioWrapper;
}

}