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// $Id: $
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2010 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 <stdexcept>
#include <iostream>
#include "DecodeGraph.h"
#include "DecodeStep.h"
#include "DummyScoreProducers.h"
#include "GlobalLexicalModel.h"
#include "GlobalLexicalModelUnlimited.h"
#include "WordTranslationFeature.h"
#include "PhrasePairFeature.h"
#include "LexicalReordering.h"
#include "StaticData.h"
#include "TranslationSystem.h"
#include "Util.h"
using namespace std;
namespace Moses {
const string TranslationSystem::DEFAULT = "default";
TranslationSystem::TranslationSystem(const std::string& id,
const WordPenaltyProducer* wpProducer,
const UnknownWordPenaltyProducer* uwpProducer,
const DistortionScoreProducer* distortionProducer)
: m_id(id), m_wpProducer(wpProducer), m_unknownWpProducer(uwpProducer), m_distortionScoreProducer(distortionProducer)
{
AddFeatureFunction(wpProducer);
AddFeatureFunction(uwpProducer);
if (distortionProducer) {
AddFeatureFunction(distortionProducer);
}
}
//Insert core 'big' features
void TranslationSystem::AddLanguageModel(LanguageModel* languageModel) {
m_languageModels.Add(languageModel);
AddFeatureFunction(languageModel);
}
void TranslationSystem::AddDecodeGraph(DecodeGraph* decodeGraph, size_t backoff) {
m_decodeGraphs.push_back(decodeGraph);
m_decodeGraphBackoff.push_back(backoff);
}
void TranslationSystem::AddReorderModel(LexicalReordering* reorderModel) {
m_reorderingTables.push_back(reorderModel);
AddFeatureFunction(reorderModel);
}
void TranslationSystem::AddGlobalLexicalModel(GlobalLexicalModel* globalLexicalModel) {
m_globalLexicalModels.push_back(globalLexicalModel);
AddFeatureFunction(globalLexicalModel);
}
void TranslationSystem::AddFeatureFunction(const FeatureFunction* ff) {
m_producers.push_back(ff);
if (ff->IsStateless()) {
const StatelessFeatureFunction* statelessFF = static_cast<const StatelessFeatureFunction*>(ff);
if (!statelessFF->ComputeValueInTranslationOption()) {
m_statelessFFs.push_back(statelessFF);
}
} else {
m_statefulFFs.push_back(static_cast<const StatefulFeatureFunction*>(ff));
}
}
void TranslationSystem::ConfigDictionaries() {
for (vector<DecodeGraph*>::const_iterator i = m_decodeGraphs.begin();
i != m_decodeGraphs.end(); ++i) {
for (DecodeGraph::const_iterator j = (*i)->begin(); j != (*i)->end(); ++j) {
const DecodeStep* step = *j;
PhraseDictionaryFeature* pdict = const_cast<PhraseDictionaryFeature*>(step->GetPhraseDictionaryFeature());
if (pdict) {
m_phraseDictionaries.push_back(pdict);
AddFeatureFunction(pdict);
const_cast<PhraseDictionaryFeature*>(pdict)->InitDictionary(this);
}
GenerationDictionary* gdict = const_cast<GenerationDictionary*>(step->GetGenerationDictionaryFeature());
if (gdict) {
m_generationDictionaries.push_back(gdict);
AddFeatureFunction(gdict);
}
}
}
}
void TranslationSystem::InitializeBeforeSentenceProcessing(const InputType& source) const {
for (vector<PhraseDictionaryFeature*>::const_iterator i = m_phraseDictionaries.begin();
i != m_phraseDictionaries.end(); ++i) {
(*i)->InitDictionary(this,source);
}
for(size_t i=0;i<m_reorderingTables.size();++i) {
m_reorderingTables[i]->InitializeForInput(source);
}
for(size_t i=0;i<m_globalLexicalModels.size();++i) {
m_globalLexicalModels[i]->InitializeForInput((Sentence const&)source);
}
//for(size_t i=0;i<m_statefulFFs.size();++i) {
//}
for(size_t i=0;i<m_statelessFFs.size();++i) {
if (m_statelessFFs[i]->GetScoreProducerWeightShortName() == "pp")
((PhrasePairFeature*)m_statelessFFs[i])->InitializeForInput((Sentence const&)source);
else if (m_statelessFFs[i]->GetScoreProducerWeightShortName() == "glm")
((GlobalLexicalModelUnlimited*)m_statelessFFs[i])->InitializeForInput((Sentence const&)source);
else if (m_statelessFFs[i]->GetScoreProducerWeightShortName() == "wt")
((WordTranslationFeature*)m_statelessFFs[i])->InitializeForInput((Sentence const&)source);
}
LMList::const_iterator iterLM;
for (iterLM = m_languageModels.begin() ; iterLM != m_languageModels.end() ; ++iterLM)
{
LanguageModel &languageModel = **iterLM;
languageModel.InitializeBeforeSentenceProcessing();
}
}
void TranslationSystem::CleanUpAfterSentenceProcessing() const {
for(size_t i=0;i<m_phraseDictionaries.size();++i)
{
PhraseDictionaryFeature &phraseDictionaryFeature = *m_phraseDictionaries[i];
PhraseDictionary* phraseDictionary = const_cast<PhraseDictionary*>(phraseDictionaryFeature.GetDictionary());
phraseDictionary->CleanUp();
}
for(size_t i=0;i<m_generationDictionaries.size();++i)
m_generationDictionaries[i]->CleanUp();
//something LMs could do after each sentence
LMList::const_iterator iterLM;
for (iterLM = m_languageModels.begin() ; iterLM != m_languageModels.end() ; ++iterLM)
{
LanguageModel &languageModel = **iterLM;
languageModel.CleanUpAfterSentenceProcessing();
}
}
float TranslationSystem::GetWeightWordPenalty() const {
float weightWP = StaticData::Instance().GetWeight(m_wpProducer);
//VERBOSE(1, "Read weightWP from translation sytem: " << weightWP << std::endl);
return weightWP;
}
float TranslationSystem::GetWeightUnknownWordPenalty() const {
return StaticData::Instance().GetWeight(m_unknownWpProducer);
}
float TranslationSystem::GetWeightDistortion() const {
CHECK(m_distortionScoreProducer);
return StaticData::Instance().GetWeight(m_distortionScoreProducer);
}
std::vector<float> TranslationSystem::GetTranslationWeights(size_t index) const {
std::vector<float> weights = StaticData::Instance().GetWeights(GetTranslationScoreProducer(index));
//VERBOSE(1, "Read weightT from translation sytem.. ");
for (size_t i = 0; i < weights.size(); ++i)
//VERBOSE(1, weights[i] << " ");
//VERBOSE(1, std::endl);
return weights;
}
};
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