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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 "moses/TranslationTask.h"
#include "OnDiskPt/OnDiskWrapper.h"
#include "OnDiskPt/Word.h"
using namespace std;
namespace Moses
{
PhraseDictionaryOnDisk::PhraseDictionaryOnDisk(const std::string &line)
: MyBase(line, true)
, m_maxSpanDefault(NOT_FOUND)
, m_maxSpanLabelled(NOT_FOUND)
{
ReadParameters();
}
PhraseDictionaryOnDisk::~PhraseDictionaryOnDisk()
{
}
void PhraseDictionaryOnDisk::Load()
{
SetFeaturesToApply();
}
ChartRuleLookupManager *PhraseDictionaryOnDisk::CreateRuleLookupManager(
const ChartParser &parser,
const ChartCellCollectionBase &cellCollection,
std::size_t /*maxChartSpan*/)
{
return new ChartRuleLookupManagerOnDisk(parser, cellCollection, *this,
GetImplementation(),
m_input,
m_output);
}
OnDiskPt::OnDiskWrapper &PhraseDictionaryOnDisk::GetImplementation()
{
OnDiskPt::OnDiskWrapper* dict;
dict = m_implementation.get();
UTIL_THROW_IF2(dict == NULL, "Dictionary object not yet created for this thread");
return *dict;
}
const OnDiskPt::OnDiskWrapper &PhraseDictionaryOnDisk::GetImplementation() const
{
OnDiskPt::OnDiskWrapper* dict;
dict = m_implementation.get();
UTIL_THROW_IF2(dict == NULL, "Dictionary object not yet created for this thread");
return *dict;
}
void PhraseDictionaryOnDisk::InitializeForInput(ttasksptr const& ttask)
{
InputType const& source = *ttask->GetSource();
ReduceCache();
OnDiskPt::OnDiskWrapper *obj = new OnDiskPt::OnDiskWrapper();
obj->BeginLoad(m_filePath);
UTIL_THROW_IF2(obj->GetMisc("Version") != OnDiskPt::OnDiskWrapper::VERSION_NUM,
"On-disk phrase table is version " << obj->GetMisc("Version")
<< ". It is not compatible with version " << OnDiskPt::OnDiskWrapper::VERSION_NUM);
UTIL_THROW_IF2(obj->GetMisc("NumSourceFactors") != m_input.size(),
"On-disk phrase table has " << obj->GetMisc("NumSourceFactors") << " source factors."
<< ". The ini file specified " << m_input.size() << " source factors");
UTIL_THROW_IF2(obj->GetMisc("NumTargetFactors") != m_output.size(),
"On-disk phrase table has " << obj->GetMisc("NumTargetFactors") << " target factors."
<< ". The ini file specified " << m_output.size() << " target factors");
UTIL_THROW_IF2(obj->GetMisc("NumScores") != m_numScoreComponents,
"On-disk phrase table has " << obj->GetMisc("NumScores") << " scores."
<< ". The ini file specified " << m_numScoreComponents << " scores");
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);
}
// delete nodes that's been saved
for (iter = inputPathQueue.begin(); iter != inputPathQueue.end(); ++iter) {
InputPath &inputPath = **iter;
const OnDiskPt::PhraseNode *ptNode = static_cast<const OnDiskPt::PhraseNode*>(inputPath.GetPtNode(*this));
delete ptNode;
}
}
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();
}
// backoff
if (!SatisfyBackoff(inputPath)) {
return;
}
if (prevPtNode) {
Word lastWord = phrase.GetWord(phrase.GetSize() - 1);
lastWord.OnlyTheseFactors(m_inputFactors);
OnDiskPt::Word *lastWordOnDisk = wrapper.ConvertFromMoses(m_input, lastWord);
TargetPhraseCollection::shared_ptr tpc;
if (lastWordOnDisk == NULL) {
// OOV according to this phrase table. Not possible to extend
inputPath.SetTargetPhrases(*this, tpc, NULL);
} else {
OnDiskPt::PhraseNode const* ptNode;
ptNode = prevPtNode->GetChild(*lastWordOnDisk, wrapper);
if (ptNode) tpc = GetTargetPhraseCollection(ptNode);
inputPath.SetTargetPhrases(*this, tpc, ptNode);
delete lastWordOnDisk;
}
}
}
TargetPhraseCollection::shared_ptr
PhraseDictionaryOnDisk::
GetTargetPhraseCollection(const OnDiskPt::PhraseNode *ptNode) const
{
TargetPhraseCollection::shared_ptr ret;
CacheColl &cache = GetCache();
size_t hash = (size_t) ptNode->GetFilePos();
CacheColl::iterator iter;
iter = cache.find(hash);
if (iter == cache.end()) {
// not in cache, need to look up from phrase table
ret = GetTargetPhraseCollectionNonCache(ptNode);
std::pair<TargetPhraseCollection::shared_ptr , clock_t> value(ret, clock());
cache[hash] = value;
} else {
// in cache. just use it
iter->second.second = clock();
ret = iter->second.first;
}
return ret;
}
TargetPhraseCollection::shared_ptr
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();
OnDiskPt::TargetPhraseCollection::shared_ptr targetPhrasesOnDisk
= ptNode->GetTargetPhraseCollection(m_tableLimit, wrapper);
TargetPhraseCollection::shared_ptr targetPhrases
= targetPhrasesOnDisk->ConvertToMoses(m_input, m_output, *this,
weightT, vocab, false);
// delete targetPhrasesOnDisk;
return targetPhrases;
}
void PhraseDictionaryOnDisk::SetParameter(const std::string& key, const std::string& value)
{
if (key == "max-span-default") {
m_maxSpanDefault = Scan<size_t>(value);
} else if (key == "max-span-labelled") {
m_maxSpanLabelled = Scan<size_t>(value);
} else {
PhraseDictionary::SetParameter(key, value);
}
}
} // namespace
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