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/*
* HReorderingBackwardState.cpp
*
* Created on: 22 Mar 2016
* Author: hieu
*/
#include "HReorderingBackwardState.h"
#include "../../PhraseBased/Hypothesis.h"
#include "../../PhraseBased/Manager.h"
namespace Moses2
{
HReorderingBackwardState::HReorderingBackwardState(MemPool &pool,
const LRModel &config, size_t offset) :
LRState(config, LRModel::Backward, offset), reoStack(pool)
{
// TODO Auto-generated constructor stub
}
HReorderingBackwardState::~HReorderingBackwardState()
{
// TODO Auto-generated destructor stub
}
void HReorderingBackwardState::Init(const LRState *prev,
const TargetPhrase<Moses2::Word> &topt, const InputPathBase &path, bool first,
const Bitmap *coverage)
{
prevTP = &topt;
reoStack.Init();
}
size_t HReorderingBackwardState::hash() const
{
size_t ret = reoStack.hash();
return ret;
}
bool HReorderingBackwardState::operator==(const FFState& o) const
{
const HReorderingBackwardState& other =
static_cast<const HReorderingBackwardState&>(o);
bool ret = reoStack == other.reoStack;
return ret;
}
std::string HReorderingBackwardState::ToString() const
{
return "HReorderingBackwardState " + SPrint(m_offset);
}
void HReorderingBackwardState::Expand(const ManagerBase &mgr,
const LexicalReordering &ff, const Hypothesis &hypo, size_t phraseTableInd,
Scores &scores, FFState &state) const
{
HReorderingBackwardState &nextState =
static_cast<HReorderingBackwardState&>(state);
nextState.Init(this, hypo.GetTargetPhrase(), hypo.GetInputPath(), false,
NULL);
nextState.reoStack = reoStack;
const Range &swrange = hypo.GetInputPath().range;
int reoDistance = nextState.reoStack.ShiftReduce(swrange);
ReorderingType reoType = m_configuration.GetOrientation(reoDistance);
CopyScores(mgr.system, scores, hypo.GetTargetPhrase(), reoType);
}
} /* namespace Moses2 */
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