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// $Id$
/***********************************************************************
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 <vector>
#include <string>
#ifdef WITH_THREADS
#include <boost/thread/tss.hpp>
#endif
#include "Phrase.h"
#include "TargetPhrase.h"
#include "Dictionary.h"
#include "TargetPhraseCollection.h"
#include "DecodeFeature.h"
namespace Moses
{
class StaticData;
class InputType;
class WordsRange;
class ChartTranslationOptionList;
class ChartCellCollection;
class TranslationSystem;
class ChartRuleLookupManager;
class PhraseDictionaryFeature;
class SparsePhraseDictionaryFeature;
/**
* Abstract base class for phrase dictionaries (tables).
**/
class PhraseDictionary: public Dictionary
{
public:
PhraseDictionary(size_t numScoreComponent, const PhraseDictionaryFeature* feature):
Dictionary(numScoreComponent), m_tableLimit(0), m_feature(feature) {}
//! table limit number.
size_t GetTableLimit() const {
return m_tableLimit;
}
DecodeType GetDecodeType() const {
return Translate;
}
const PhraseDictionaryFeature* GetFeature() const;
//! find list of translations that can translates src. Only for phrase input
virtual const TargetPhraseCollection *GetTargetPhraseCollection(const Phrase& src) const=0;
//! find list of translations that can translates a portion of src. Used by confusion network decoding
virtual const TargetPhraseCollection *GetTargetPhraseCollection(InputType const& src,WordsRange const& range) const;
//! Create entry for translation of source to targetPhrase
virtual void InitializeForInput(InputType const& source) = 0;
//! Create a sentence-specific manager for SCFG rule lookup.
virtual ChartRuleLookupManager *CreateRuleLookupManager(
const InputType &,
const ChartCellCollection &) = 0;
protected:
size_t m_tableLimit;
const PhraseDictionaryFeature* m_feature;
};
/**
* Represents a feature derived from a phrase table.
*/
class PhraseDictionaryFeature : public DecodeFeature
{
public:
PhraseDictionaryFeature( PhraseTableImplementation implementation
, SparsePhraseDictionaryFeature* spdf
, size_t numScoreComponent
, unsigned numInputScores
, const std::vector<FactorType> &input
, const std::vector<FactorType> &output
, const std::string &filePath
, const std::vector<float> &weight
, size_t tableLimit
, const std::string &targetFile
, const std::string &alignmentsFile);
virtual ~PhraseDictionaryFeature();
virtual bool ComputeValueInTranslationOption() const;
std::string GetScoreProducerWeightShortName(unsigned idx=0) const;
size_t GetNumInputScores() const;
SparsePhraseDictionaryFeature* GetSparsePhraseDictionaryFeature() const {
return m_sparsePhraseDictionaryFeature;
}
//Initialises the dictionary (may involve loading from file)
void InitDictionary(const TranslationSystem* system);
//Initialise the dictionary for this source (in this thread)
void InitDictionary(const TranslationSystem* system,const InputType& source);
//Get the dictionary. Be sure to initialise it first.
const PhraseDictionary* GetDictionary() const;
PhraseDictionary* GetDictionary();
private:
/** Load the appropriate phrase table */
PhraseDictionary* LoadPhraseTable(const TranslationSystem* system);
unsigned m_numInputScores;
std::string m_filePath;
std::vector<float> m_weight;
size_t m_tableLimit;
//We instantiate either the the thread-safe or non-thread-safe dictionary,
//but not both. The thread-safe one can be instantiated in the constructor and shared
//between threads, however the non-thread-safe one (eg PhraseDictionaryTree) must be instantiated
//on demand, and stored in thread-specific storage.
std::auto_ptr<PhraseDictionary> m_threadSafePhraseDictionary;
#ifdef WITH_THREADS
boost::thread_specific_ptr<PhraseDictionary> m_threadUnsafePhraseDictionary;
#else
std::auto_ptr<PhraseDictionary> m_threadUnsafePhraseDictionary;
#endif
bool m_useThreadSafePhraseDictionary;
PhraseTableImplementation m_implementation;
std::string m_targetFile;
std::string m_alignmentsFile;
SparsePhraseDictionaryFeature* m_sparsePhraseDictionaryFeature;
};
}
#endif
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