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// vim:tabstop=2
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2010 Hieu Hoang
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 "PhraseDictionaryOnDisk.h"
#include "moses/InputFileStream.h"
#include "moses/StaticData.h"
#include "moses/TargetPhraseCollection.h"
#include "moses/InputPath.h"
#include "moses/TranslationModel/CYKPlusParser/DotChartOnDisk.h"
#include "moses/TranslationModel/CYKPlusParser/ChartRuleLookupManagerOnDisk.h"
#include "OnDiskPt/OnDiskWrapper.h"
#include "OnDiskPt/Word.h"
using namespace std;
namespace Moses
{
PhraseDictionaryOnDisk::PhraseDictionaryOnDisk(const std::string &line)
: MyBase(line)
{
ReadParameters();
}
PhraseDictionaryOnDisk::~PhraseDictionaryOnDisk()
{
}
void PhraseDictionaryOnDisk::Load()
{
SetFeaturesToApply();
}
ChartRuleLookupManager *PhraseDictionaryOnDisk::CreateRuleLookupManager(
const ChartParser &parser,
const ChartCellCollectionBase &cellCollection)
{
return new ChartRuleLookupManagerOnDisk(parser, cellCollection, *this,
GetImplementation(),
m_input,
m_output, m_filePath);
}
OnDiskPt::OnDiskWrapper &PhraseDictionaryOnDisk::GetImplementation()
{
OnDiskPt::OnDiskWrapper* dict;
dict = m_implementation.get();
CHECK(dict);
return *dict;
}
const OnDiskPt::OnDiskWrapper &PhraseDictionaryOnDisk::GetImplementation() const
{
OnDiskPt::OnDiskWrapper* dict;
dict = m_implementation.get();
CHECK(dict);
return *dict;
}
void PhraseDictionaryOnDisk::InitializeForInput(InputType const& source)
{
const StaticData &staticData = StaticData::Instance();
ReduceCache();
OnDiskPt::OnDiskWrapper *obj = new OnDiskPt::OnDiskWrapper();
if (!obj->BeginLoad(m_filePath))
return;
CHECK(obj->GetMisc("Version") == OnDiskPt::OnDiskWrapper::VERSION_NUM);
CHECK(obj->GetMisc("NumSourceFactors") == m_input.size());
CHECK(obj->GetMisc("NumTargetFactors") == m_output.size());
CHECK(obj->GetMisc("NumScores") == m_numScoreComponents);
m_implementation.reset(obj);
}
void PhraseDictionaryOnDisk::GetTargetPhraseCollectionBatch(const InputPathList &inputPathQueue) const
{
InputPathList::const_iterator iter;
for (iter = inputPathQueue.begin(); iter != inputPathQueue.end(); ++iter) {
InputPath &inputPath = **iter;
GetTargetPhraseCollectionBatch(inputPath);
}
}
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();
}
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;
}
}
}
const TargetPhraseCollection *PhraseDictionaryOnDisk::GetTargetPhraseCollection(const OnDiskPt::PhraseNode *ptNode) const
{
const TargetPhraseCollection *ret;
if (m_maxCacheSize) {
CacheColl &cache = GetCache();
size_t hash = (size_t) ptNode->GetFilePos();
std::map<size_t, std::pair<const TargetPhraseCollection*, clock_t> >::iterator iter;
iter = cache.find(hash);
if (iter == cache.end()) {
// not in cache, need to look up from phrase table
ret = GetTargetPhraseCollectionNonCache(ptNode);
if (ret) {
ret = new TargetPhraseCollection(*ret);
}
std::pair<const TargetPhraseCollection*, clock_t> value(ret, clock());
cache[hash] = value;
} else {
// in cache. just use it
std::pair<const TargetPhraseCollection*, clock_t> &value = iter->second;
value.second = clock();
ret = value.first;
}
} else {
ret = GetTargetPhraseCollectionNonCache(ptNode);
}
return ret;
}
const TargetPhraseCollection *PhraseDictionaryOnDisk::GetTargetPhraseCollectionNonCache(const OnDiskPt::PhraseNode *ptNode) const
{
OnDiskPt::OnDiskWrapper &wrapper = const_cast<OnDiskPt::OnDiskWrapper&>(GetImplementation());
vector<float> weightT = StaticData::Instance().GetWeights(this);
OnDiskPt::Vocab &vocab = wrapper.GetVocab();
const OnDiskPt::TargetPhraseCollection *targetPhrasesOnDisk = ptNode->GetTargetPhraseCollection(m_tableLimit, wrapper);
TargetPhraseCollection *targetPhrases
= targetPhrasesOnDisk->ConvertToMoses(m_input, m_output, *this, weightT, vocab, false);
delete targetPhrasesOnDisk;
return targetPhrases;
}
} // namespace
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