File size: 2,461 Bytes
158b61b |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 |
// -*- mode: c++; indent-tabs-mode: nil; tab-width:2 -*-
/***********************************************************************
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_LanguageModelSingleFactor_h
#define moses_LanguageModelSingleFactor_h
#include "Implementation.h"
#include "moses/Phrase.h"
namespace Moses
{
class FactorCollection;
class Factor;
//! Abstract class for for single factor LM
class LanguageModelSingleFactor : public LanguageModelImplementation
{
protected:
typedef const void *State;
const Factor *m_sentenceStart, *m_sentenceEnd;
FactorType m_factorType;
FFState *m_nullContextState;
FFState *m_beginSentenceState;
LanguageModelSingleFactor(const std::string &line);
public:
virtual ~LanguageModelSingleFactor();
bool IsUseable(const FactorMask &mask) const;
virtual void SetParameter(const std::string& key, const std::string& value);
const Factor *GetSentenceStart() const {
return m_sentenceStart;
}
const Factor *GetSentenceEnd() const {
return m_sentenceEnd;
}
FactorType GetFactorType() const {
return m_factorType;
}
virtual const FFState *GetNullContextState() const;
virtual const FFState *GetBeginSentenceState() const;
virtual FFState *NewState(const FFState *from = NULL) const;
virtual LMResult GetValueForgotState(const std::vector<const Word*> &contextFactor, FFState &outState) const;
protected:
virtual LMResult GetValue(const std::vector<const Word*> &contextFactor, State* finalState = NULL) const = 0;
public:
std::string DebugContextFactor(const std::vector<const Word*> &contextFactor) const;
};
}
#endif
|