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123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
// $Id$
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// vim:tabstop=2
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/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2010 Hieu Hoang
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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***********************************************************************/
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#pragma once
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#include <vector>
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#include <boost/unordered_map.hpp>
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#include "ChartCell.h"
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#include "ChartCellCollection.h"
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#include "InputType.h"
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#include "WordsRange.h"
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#include "SentenceStats.h"
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#include "TranslationSystem.h"
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#include "ChartTranslationOptionList.h"
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#include "ChartParser.h"
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#include <boost/shared_ptr.hpp>
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namespace Moses
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{
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class ChartHypothesis;
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class ChartTrellisDetourQueue;
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class ChartTrellisNode;
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class ChartTrellisPath;
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class ChartTrellisPathList;
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/** Holds everything you need to decode 1 sentence with the hierachical/syntax decoder
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*/
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class ChartManager
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{
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private:
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static void CreateDeviantPaths(boost::shared_ptr<const ChartTrellisPath>,
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ChartTrellisDetourQueue &);
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static void CreateDeviantPaths(boost::shared_ptr<const ChartTrellisPath>,
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const ChartTrellisNode &,
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ChartTrellisDetourQueue &);
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InputType const& m_source; /**< source sentence to be translated */
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ChartCellCollection m_hypoStackColl;
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std::auto_ptr<SentenceStats> m_sentenceStats;
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const TranslationSystem* m_system;
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clock_t m_start; /**< starting time, used for logging */
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unsigned m_hypothesisId; /* For handing out hypothesis ids to ChartHypothesis */
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ChartParser m_parser;
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ChartTranslationOptionList m_translationOptionList; /**< pre-computed list of translation options for the phrases in this sentence */
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//! Some features should be calculated prior to search
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boost::unordered_map<TargetPhrase,ScoreComponentCollection, TargetPhraseHasher, TargetPhraseComparator> m_precalculatedScores;
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//! Pre-calculate most stateless feature values
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void PreCalculateScores();
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public:
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ChartManager(InputType const& source, const TranslationSystem* system);
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~ChartManager();
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void ProcessSentence();
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void AddXmlChartOptions();
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const ChartHypothesis *GetBestHypothesis() const;
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void CalcNBest(size_t count, ChartTrellisPathList &ret, bool onlyDistinct=0) const;
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void GetSearchGraph(long translationId, std::ostream &outputSearchGraphStream) const;
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void FindReachableHypotheses( const ChartHypothesis *hypo, std::map<unsigned,bool> &reachable ) const; /* auxilliary function for GetSearchGraph */
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//! the input sentence being decoded
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const InputType& GetSource() const {
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return m_source;
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}
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//! which particular set of models is in use
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const TranslationSystem* GetTranslationSystem() const {
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return m_system;
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}
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//! debug data collected when decoding sentence
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SentenceStats& GetSentenceStats() const {
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return *m_sentenceStats;
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}
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/***
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* to be called after processing a sentence (which may consist of more than just calling ProcessSentence() )
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* currently an empty function
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*/
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void CalcDecoderStatistics() const
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{ }
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void ResetSentenceStats(const InputType& source) {
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m_sentenceStats = std::auto_ptr<SentenceStats>(new SentenceStats(source));
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}
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//! contigious hypo id for each input sentence. For debugging purposes
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unsigned GetNextHypoId() { return m_hypothesisId++; }
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//! Access the pre-calculated values
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void InsertPreCalculatedScores(const TargetPhrase& targetPhrase,
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ScoreComponentCollection* scoreBreakdown) const;
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};
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}
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