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/*
* PhraseLR.cpp
*
* Created on: 22 Mar 2016
* Author: hieu
*/
#include "PhraseBasedReorderingState.h"
#include "LexicalReordering.h"
#include "../../PhraseBased/Hypothesis.h"
#include "../../InputPathBase.h"
#include "../../PhraseBased/Manager.h"
using namespace std;
namespace Moses2
{
PhraseBasedReorderingState::PhraseBasedReorderingState(const LRModel &config,
LRModel::Direction dir, size_t offset) :
LRState(config, dir, offset)
{
// uninitialised
prevPath = NULL;
prevTP = NULL;
}
void PhraseBasedReorderingState::Init(const LRState *prev,
const TargetPhrase<Moses2::Word> &topt, const InputPathBase &path, bool first,
const Bitmap *coverage)
{
prevTP = &topt;
prevPath = &path;
m_first = first;
}
size_t PhraseBasedReorderingState::hash() const
{
size_t ret;
ret = (size_t) &prevPath->range;
boost::hash_combine(ret, m_direction);
return ret;
}
bool PhraseBasedReorderingState::operator==(const FFState& o) const
{
if (&o == this) return true;
const PhraseBasedReorderingState &other =
static_cast<const PhraseBasedReorderingState&>(o);
if (&prevPath->range == &other.prevPath->range) {
if (m_direction == LRModel::Forward) {
int compareScore = ComparePrevScores(other.prevTP);
return compareScore == 0;
} else {
return true;
}
} else {
return false;
}
}
void PhraseBasedReorderingState::Expand(const ManagerBase &mgr,
const LexicalReordering &ff, const Hypothesis &hypo, size_t phraseTableInd,
Scores &scores, FFState &state) const
{
if ((m_direction != LRModel::Forward) || !m_first) {
LRModel const& lrmodel = m_configuration;
Range const &cur = hypo.GetInputPath().range;
LRModel::ReorderingType reoType = (
m_first ?
lrmodel.GetOrientation(cur) :
lrmodel.GetOrientation(prevPath->range, cur));
CopyScores(mgr.system, scores, hypo.GetTargetPhrase(), reoType);
}
PhraseBasedReorderingState &stateCast =
static_cast<PhraseBasedReorderingState&>(state);
stateCast.Init(this, hypo.GetTargetPhrase(), hypo.GetInputPath(), false,
NULL);
}
} /* namespace Moses2 */
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