mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-26 13:23:25 +03:00
277 lines
10 KiB
C++
277 lines
10 KiB
C++
// $Id$
|
|
|
|
/***********************************************************************
|
|
Moses - factored phrase-based language decoder
|
|
Copyright (C) 2006 University of Edinburgh
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
***********************************************************************/
|
|
|
|
#include "DecodeStepTranslation.h"
|
|
#include "TranslationOption.h"
|
|
#include "TranslationOptionCollection.h"
|
|
#include "PartialTranslOptColl.h"
|
|
#include "FactorCollection.h"
|
|
#include "util/exception.hh"
|
|
|
|
using namespace std;
|
|
|
|
namespace Moses
|
|
{
|
|
DecodeStepTranslation::DecodeStepTranslation(PhraseDictionary* pdf,
|
|
const DecodeStep* prev,
|
|
const std::vector<FeatureFunction*> &features)
|
|
: DecodeStep(pdf, prev, features)
|
|
{
|
|
// don't apply feature functions that are from current phrase table.It should already have been
|
|
// dont by the phrase table.
|
|
const std::vector<FeatureFunction*> &pdfFeatures = pdf->GetFeaturesToApply();
|
|
for (size_t i = 0; i < pdfFeatures.size(); ++i) {
|
|
FeatureFunction *ff = pdfFeatures[i];
|
|
RemoveFeature(ff);
|
|
}
|
|
}
|
|
|
|
void DecodeStepTranslation::Process(const TranslationOption &inputPartialTranslOpt
|
|
, const DecodeStep &decodeStep
|
|
, PartialTranslOptColl &outputPartialTranslOptColl
|
|
, TranslationOptionCollection *toc
|
|
, bool adhereTableLimit
|
|
, const TargetPhraseCollection *phraseColl) const
|
|
{
|
|
if (inputPartialTranslOpt.GetTargetPhrase().GetSize() == 0) {
|
|
// word deletion
|
|
outputPartialTranslOptColl.Add(new TranslationOption(inputPartialTranslOpt));
|
|
return;
|
|
}
|
|
|
|
// normal trans step
|
|
const WordsRange &sourceWordsRange = inputPartialTranslOpt.GetSourceWordsRange();
|
|
const InputPath &inputPath = inputPartialTranslOpt.GetInputPath();
|
|
const PhraseDictionary* phraseDictionary =
|
|
decodeStep.GetPhraseDictionaryFeature();
|
|
const TargetPhrase &inPhrase = inputPartialTranslOpt.GetTargetPhrase();
|
|
const size_t currSize = inPhrase.GetSize();
|
|
const size_t tableLimit = phraseDictionary->GetTableLimit();
|
|
|
|
if (phraseColl != NULL) {
|
|
TargetPhraseCollection::const_iterator iterTargetPhrase, iterEnd;
|
|
iterEnd = (!adhereTableLimit || tableLimit == 0 || phraseColl->GetSize() < tableLimit) ? phraseColl->end() : phraseColl->begin() + tableLimit;
|
|
|
|
for (iterTargetPhrase = phraseColl->begin(); iterTargetPhrase != iterEnd; ++iterTargetPhrase) {
|
|
const TargetPhrase& targetPhrase = **iterTargetPhrase;
|
|
// const ScoreComponentCollection &transScores = targetPhrase.GetScoreBreakdown();
|
|
// skip if the
|
|
if (targetPhrase.GetSize() != currSize) continue;
|
|
|
|
TargetPhrase outPhrase(inPhrase);
|
|
|
|
if (IsFilteringStep()) {
|
|
if (!inputPartialTranslOpt.IsCompatible(targetPhrase, m_conflictFactors))
|
|
continue;
|
|
}
|
|
|
|
outPhrase.Merge(targetPhrase, m_newOutputFactors);
|
|
outPhrase.EvaluateInIsolation(inputPath.GetPhrase(), m_featuresToApply); // need to do this as all non-transcores would be screwed up
|
|
|
|
TranslationOption *newTransOpt = new TranslationOption(sourceWordsRange, outPhrase);
|
|
assert(newTransOpt != NULL);
|
|
|
|
newTransOpt->SetInputPath(inputPath);
|
|
|
|
outputPartialTranslOptColl.Add(newTransOpt );
|
|
|
|
}
|
|
} else if (sourceWordsRange.GetNumWordsCovered() == 1) {
|
|
// unknown handler
|
|
//toc->ProcessUnknownWord(sourceWordsRange.GetStartPos(), factorCollection);
|
|
}
|
|
}
|
|
|
|
void DecodeStepTranslation::ProcessInitialTranslation(
|
|
const InputType &source
|
|
,PartialTranslOptColl &outputPartialTranslOptColl
|
|
, size_t startPos, size_t endPos, bool adhereTableLimit
|
|
, const InputPath &inputPath
|
|
, const TargetPhraseCollection *phraseColl) const
|
|
{
|
|
const PhraseDictionary* phraseDictionary = GetPhraseDictionaryFeature();
|
|
const size_t tableLimit = phraseDictionary->GetTableLimit();
|
|
|
|
const WordsRange wordsRange(startPos, endPos);
|
|
|
|
if (phraseColl != NULL) {
|
|
IFVERBOSE(3) {
|
|
if(StaticData::Instance().GetInputType() == SentenceInput)
|
|
TRACE_ERR("[" << source.GetSubString(wordsRange) << "; " << startPos << "-" << endPos << "]\n");
|
|
else
|
|
TRACE_ERR("[" << startPos << "-" << endPos << "]" << std::endl);
|
|
}
|
|
|
|
TargetPhraseCollection::const_iterator iterTargetPhrase, iterEnd;
|
|
iterEnd = (!adhereTableLimit || tableLimit == 0 || phraseColl->GetSize() < tableLimit) ? phraseColl->end() : phraseColl->begin() + tableLimit;
|
|
|
|
for (iterTargetPhrase = phraseColl->begin() ; iterTargetPhrase != iterEnd ; ++iterTargetPhrase) {
|
|
const TargetPhrase &targetPhrase = **iterTargetPhrase;
|
|
TranslationOption *transOpt = new TranslationOption(wordsRange, targetPhrase);
|
|
|
|
transOpt->SetInputPath(inputPath);
|
|
|
|
outputPartialTranslOptColl.Add (transOpt);
|
|
|
|
VERBOSE(3,"\t" << targetPhrase << "\n");
|
|
}
|
|
VERBOSE(3,std::endl);
|
|
}
|
|
}
|
|
|
|
void DecodeStepTranslation::ProcessInitialTranslationLEGACY(
|
|
const InputType &source
|
|
,PartialTranslOptColl &outputPartialTranslOptColl
|
|
, size_t startPos, size_t endPos, bool adhereTableLimit
|
|
, const InputPathList &inputPathList) const
|
|
{
|
|
const PhraseDictionary* phraseDictionary = GetPhraseDictionaryFeature();
|
|
const size_t tableLimit = phraseDictionary->GetTableLimit();
|
|
|
|
const WordsRange wordsRange(startPos, endPos);
|
|
const TargetPhraseCollectionWithSourcePhrase *phraseColl = phraseDictionary->GetTargetPhraseCollectionLEGACY(source,wordsRange);
|
|
|
|
if (phraseColl != NULL) {
|
|
IFVERBOSE(3) {
|
|
if(StaticData::Instance().GetInputType() == SentenceInput)
|
|
TRACE_ERR("[" << source.GetSubString(wordsRange) << "; " << startPos << "-" << endPos << "]\n");
|
|
else
|
|
TRACE_ERR("[" << startPos << "-" << endPos << "]" << std::endl);
|
|
}
|
|
|
|
const std::vector<Phrase> &sourcePhrases = phraseColl->GetSourcePhrases();
|
|
|
|
TargetPhraseCollection::const_iterator iterTargetPhrase, iterEnd;
|
|
std::vector<Phrase>::const_iterator iterSourcePhrase;
|
|
iterEnd = (!adhereTableLimit || tableLimit == 0 || phraseColl->GetSize() < tableLimit) ? phraseColl->end() : phraseColl->begin() + tableLimit;
|
|
|
|
for (iterTargetPhrase = phraseColl->begin(), iterSourcePhrase = sourcePhrases.begin()
|
|
; iterTargetPhrase != iterEnd
|
|
; ++iterTargetPhrase, ++iterSourcePhrase) {
|
|
assert(iterSourcePhrase != sourcePhrases.end());
|
|
|
|
const TargetPhrase &targetPhrase = **iterTargetPhrase;
|
|
const Phrase &sourcePhrase = *iterSourcePhrase;
|
|
|
|
const InputPath &inputPath = GetInputPathLEGACY(targetPhrase, sourcePhrase, inputPathList);
|
|
|
|
TranslationOption *transOpt = new TranslationOption(wordsRange, targetPhrase);
|
|
transOpt->SetInputPath(inputPath);
|
|
|
|
outputPartialTranslOptColl.Add (transOpt);
|
|
|
|
VERBOSE(3,"\t" << targetPhrase << "\n");
|
|
}
|
|
VERBOSE(3,std::endl);
|
|
}
|
|
}
|
|
|
|
const InputPath &DecodeStepTranslation::GetInputPathLEGACY(
|
|
const TargetPhrase targetPhrase,
|
|
const Phrase sourcePhrase,
|
|
const InputPathList &inputPathList) const
|
|
{
|
|
const Word &wordFromPt = sourcePhrase.GetWord(0);
|
|
|
|
InputPathList::const_iterator iter;
|
|
for (iter = inputPathList.begin(); iter != inputPathList.end(); ++iter) {
|
|
const InputPath &inputPath = **iter;
|
|
const Phrase &phraseFromIP = inputPath.GetPhrase();
|
|
|
|
const Word *wordIP = NULL;
|
|
for (size_t i = 0; i < phraseFromIP.GetSize(); ++i) {
|
|
const Word &tempWord = phraseFromIP.GetWord(i);
|
|
if (!tempWord.IsEpsilon()) {
|
|
wordIP = &tempWord;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// const WordsRange &range = inputPath.GetWordsRange();
|
|
|
|
if (wordIP && *wordIP == wordFromPt) {
|
|
return inputPath;
|
|
}
|
|
}
|
|
|
|
UTIL_THROW(util::Exception, "Input path not found");
|
|
}
|
|
|
|
void
|
|
DecodeStepTranslation::
|
|
ProcessLEGACY(TranslationOption const& in,
|
|
DecodeStep const& decodeStep,
|
|
PartialTranslOptColl &out,
|
|
TranslationOptionCollection *toc,
|
|
bool adhereTableLimit) const
|
|
{
|
|
if (in.GetTargetPhrase().GetSize() == 0)
|
|
{
|
|
// word deletion
|
|
out.Add(new TranslationOption(in));
|
|
return;
|
|
}
|
|
|
|
// normal trans step
|
|
WordsRange const& srcRange = in.GetSourceWordsRange();
|
|
InputPath const& inputPath = in.GetInputPath();
|
|
PhraseDictionary const* pdict = decodeStep.GetPhraseDictionaryFeature();
|
|
TargetPhrase const& inPhrase = in.GetTargetPhrase();
|
|
size_t const currSize = inPhrase.GetSize();
|
|
size_t const tableLimit = pdict->GetTableLimit();
|
|
|
|
TargetPhraseCollectionWithSourcePhrase const* phraseColl;
|
|
phraseColl = pdict->GetTargetPhraseCollectionLEGACY(toc->GetSource(),srcRange);
|
|
|
|
if (phraseColl != NULL)
|
|
{
|
|
TargetPhraseCollection::const_iterator iterTargetPhrase, iterEnd;
|
|
iterEnd = ((adhereTableLimit && tableLimit && phraseColl->GetSize() >= tableLimit)
|
|
? phraseColl->begin() + tableLimit : phraseColl->end());
|
|
|
|
for (iterTargetPhrase = phraseColl->begin();
|
|
iterTargetPhrase != iterEnd;
|
|
++iterTargetPhrase)
|
|
{
|
|
TargetPhrase const& targetPhrase = **iterTargetPhrase;
|
|
if (targetPhrase.GetSize() != currSize ||
|
|
(IsFilteringStep() && !in.IsCompatible(targetPhrase, m_conflictFactors)))
|
|
continue;
|
|
|
|
TargetPhrase outPhrase(inPhrase);
|
|
outPhrase.Merge(targetPhrase, m_newOutputFactors);
|
|
outPhrase.EvaluateInIsolation(inputPath.GetPhrase(), m_featuresToApply); // need to do this as all non-transcores would be screwed up
|
|
|
|
TranslationOption *newTransOpt = new TranslationOption(srcRange, outPhrase);
|
|
assert(newTransOpt != NULL);
|
|
|
|
newTransOpt->SetInputPath(inputPath);
|
|
|
|
out.Add(newTransOpt);
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|