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113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
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// $Id$
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/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2006 University of Edinburgh
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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 "Phrase.h"
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#include "ScoreComponentCollection.h"
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class LMList;
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class PhraseDictionary;
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class GenerationDictionary;
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class ScoreProducer;
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/** represents an entry on the target side of a phrase table (scores, translation)
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*/
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class TargetPhrase: public Phrase
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{
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friend std::ostream& operator<<(std::ostream&, const TargetPhrase&);
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protected:
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float m_transScore, m_ngramScore, m_fullScore;
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//float m_ngramScore, m_fullScore;
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ScoreComponentCollection m_scoreBreakdown;
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// in case of confusion net, ptr to source phrase
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Phrase const* m_sourcePhrase;
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public:
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TargetPhrase(FactorDirection direction=Output);
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//! used by the unknown word handler- these targets
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//! don't have a translation score, so wp is the only thing used
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void SetScore();
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//!Set score for Sentence XML target options
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void SetScore(float score);
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/*** Called immediately after creation to initialize scores.
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*
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* @param translationScoreProducer The PhraseDictionaryMemory that this TargetPhrase is contained by.
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* Used to identify where the scores for this phrase belong in the list of all scores.
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* @param scoreVector the vector of scores (log probs) associated with this translation
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* @param weighT the weights for the individual scores (t-weights in the .ini file)
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* @param languageModels all the LanguageModels that should be used to compute the LM scores
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* @param weightWP the weight of the word penalty
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*
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* @TODO should this be part of the constructor? If not, add explanation why not.
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*/
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void SetScore(const ScoreProducer* translationScoreProducer,
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const std::vector<float> &scoreVector,
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const std::vector<float> &weightT,
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float weightWP,
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const LMList &languageModels);
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// used when creating translations of unknown words:
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void ResetScore();
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void SetWeights(const ScoreProducer*, const std::vector<float> &weightT);
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TargetPhrase *MergeNext(const TargetPhrase &targetPhrase) const;
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// used for translation step
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/* inline float GetTranslationScore() const
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{
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return m_transScore;
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}*/
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/***
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* return the estimated score resulting from our being added to a sentence
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* (it's an estimate because we don't have full n-gram info for the language model
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* without using the (unknown) full sentence)
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*
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*/
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inline float GetFutureScore() const
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{
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return m_fullScore;
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}
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inline const ScoreComponentCollection &GetScoreBreakdown() const
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{
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return m_scoreBreakdown;
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}
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//! TODO - why is this needed and is it set correctly by every phrase dictionary class ? should be set in constructor
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void SetSourcePhrase(Phrase const* p)
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{
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m_sourcePhrase=p;
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}
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Phrase const* GetSourcePhrase() const
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{
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return m_sourcePhrase;
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}
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TO_STRING();
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};
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std::ostream& operator<<(std::ostream&, const TargetPhrase&);
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