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// -*- mode: c++; indent-tabs-mode: nil; tab-width:2 -*-
#pragma once
#include <vector>
#include <string>
#include "moses/Hypothesis.h"
#include "moses/ScoreComponentCollection.h"
#include "moses/Range.h"
#include "moses/Bitmap.h"
#include "moses/TranslationOption.h"
#include "moses/FF/FFState.h"
#include "LRModel.h"
namespace Moses
{
//! Abstract class for lexical reordering model states
class LRState : public FFState
{
public:
typedef LRModel::ReorderingType ReorderingType;
virtual
LRState*
Expand(const TranslationOption& hypo, const InputType& input,
ScoreComponentCollection* scores) const = 0;
static
LRState*
CreateLRState(const std::vector<std::string>& config,
LRModel::Direction dir,
const InputType &input);
protected:
const LRModel& m_configuration;
// The following is the true direction of the object, which can be
// Backward or Forward even if the Configuration has Bidirectional.
LRModel::Direction m_direction;
size_t m_offset;
//forward scores are conditioned on prev option, so need to remember it
const TranslationOption *m_prevOption;
inline
LRState(const LRState *prev,
const TranslationOption &topt)
: m_configuration(prev->m_configuration)
, m_direction(prev->m_direction)
, m_offset(prev->m_offset)
, m_prevOption(&topt)
{ }
inline
LRState(const LRModel &config,
LRModel::Direction dir,
size_t offset)
: m_configuration(config)
, m_direction(dir)
, m_offset(offset)
, m_prevOption(NULL)
{ }
// copy the right scores in the right places, taking into account
// forward/backward, offset, collapse
void
CopyScores(ScoreComponentCollection* scores,
const TranslationOption& topt,
const InputType& input, ReorderingType reoType) const;
int
ComparePrevScores(const TranslationOption *other) const;
};
}
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