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// -*- 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
***********************************************************************/
#ifndef moses_PhraseDictionary_h
#define moses_PhraseDictionary_h
#include <iostream>
#include <map>
#include <memory>
#include <list>
#include <stdexcept>
#include <vector>
#include <string>
#include <boost/unordered_map.hpp>
#ifdef WITH_THREADS
#include <boost/thread/tss.hpp>
#else
#include <boost/scoped_ptr.hpp>
#include <time.h>
#endif
#include "moses/Phrase.h"
#include "moses/TargetPhrase.h"
#include "moses/TargetPhraseCollection.h"
#include "moses/InputPath.h"
#include "moses/FF/DecodeFeature.h"
namespace Moses
{
class StaticData;
class InputType;
class WordsRange;
class ChartCellCollectionBase;
class ChartRuleLookupManager;
class ChartParser;
class CacheColl : public boost::unordered_map<size_t, std::pair<const TargetPhraseCollection*, clock_t> >
{
// 1st = hash of source phrase/ address of phrase-table node
// 2nd = all translations
// 3rd = time of last access
public:
~CacheColl();
};
/**
* Abstract base class for phrase dictionaries (tables).
**/
class PhraseDictionary : public DecodeFeature
{
public:
virtual bool ProvidesPrefixCheck() const;
static const std::vector<PhraseDictionary*>& GetColl() {
return s_staticColl;
}
PhraseDictionary(const std::string &line);
virtual ~PhraseDictionary() {
}
//! table limit number.
size_t GetTableLimit() const {
return m_tableLimit;
}
//! continguous id for each pt, starting from 0
size_t GetId() const {
return m_id;
}
virtual
void
Release(TargetPhraseCollection const* tpc) const;
/// return true if phrase table entries starting with /phrase/
// exist in the table.
virtual
bool
PrefixExists(Phrase const& phrase) const;
// LEGACY!
// The preferred method is to override GetTargetPhraseCollectionBatch().
// See class PhraseDictionaryMemory or PhraseDictionaryOnDisk for details
//! find list of translations that can translates src. Only for phrase input
virtual
TargetPhraseCollection const *
GetTargetPhraseCollectionLEGACY(const Phrase& src) const;
virtual
void
GetTargetPhraseCollectionBatch(const InputPathList &inputPathQueue) const;
//! Create entry for translation of source to targetPhrase
virtual void InitializeForInput(InputType const& source) {
}
// clean up temporary memory, called after processing each sentence
virtual void CleanUpAfterSentenceProcessing(const InputType& source) {
}
//! Create a sentence-specific manager for SCFG rule lookup.
virtual ChartRuleLookupManager *CreateRuleLookupManager(
const ChartParser &,
const ChartCellCollectionBase &,
std::size_t) = 0;
const std::string &GetFilePath() const {
return m_filePath;
}
const std::vector<FeatureFunction*> &GetFeaturesToApply() const {
return m_featuresToApply;
}
void SetParameter(const std::string& key, const std::string& value);
// LEGACY
//! find list of translations that can translates a portion of src. Used by confusion network decoding
virtual const TargetPhraseCollectionWithSourcePhrase* GetTargetPhraseCollectionLEGACY(InputType const& src,WordsRange const& range) const;
protected:
static std::vector<PhraseDictionary*> s_staticColl;
size_t m_tableLimit;
std::string m_filePath;
// features to apply evaluate target phrase when loading.
// NOT when creating translation options. Those are in DecodeStep
std::vector<FeatureFunction*> m_featuresToApply;
// MUST be called at the start of Load()
void SetFeaturesToApply();
bool SatisfyBackoff(const InputPath &inputPath) const;
// cache
size_t m_maxCacheSize; // 0 = no caching
#ifdef WITH_THREADS
//reader-writer lock
mutable boost::thread_specific_ptr<CacheColl> m_cache;
#else
mutable boost::scoped_ptr<CacheColl> m_cache;
#endif
virtual const TargetPhraseCollection *GetTargetPhraseCollectionNonCacheLEGACY(const Phrase& src) const;
void ReduceCache() const;
protected:
CacheColl &GetCache() const;
size_t m_id;
};
}
#endif
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