LexicalReorderingState* HierarchicalReorderingForwardState::Expand(const TranslationOption& topt, Scores& scores) const {
const LexicalReorderingConfiguration::ModelType modelType = m_configuration.GetModelType();
const WordsRange currWordsRange = topt.GetSourceWordsRange();
// keep track of the current coverage ourselves so we don't need the hypothesis
WordsBitmap coverage = m_coverage;
coverage.SetValue(currWordsRange.GetStartPos(), currWordsRange.GetEndPos(), true);
ReorderingType reoType;
if (m_first) {
ClearScores(scores);
} else {
if (modelType == LexicalReorderingConfiguration::MSD) {
reoType = GetOrientationTypeMSD(currWordsRange, coverage);
} else if (modelType == LexicalReorderingConfiguration::MSLR) {
reoType = GetOrientationTypeMSLR(currWordsRange, coverage);
} else if (modelType == LexicalReorderingConfiguration::Monotonic) {
reoType = GetOrientationTypeMonotonic(currWordsRange, coverage);
} else {
reoType = GetOrientationTypeLeftRight(currWordsRange, coverage);
}
CopyScores(scores, topt, reoType);
}
return new HierarchicalReorderingForwardState(this, topt);
}
LexicalReorderingState* PhraseBasedReorderingState::Expand(const TranslationOption& topt, Scores& scores) const
{
ReorderingType reoType;
const WordsRange currWordsRange = topt.GetSourceWordsRange();
const LexicalReorderingConfiguration::ModelType modelType = m_configuration.GetModelType();
if (m_direction == LexicalReorderingConfiguration::Forward && m_first) {
ClearScores(scores);
} else {
if (!m_first || m_useFirstBackwardScore) {
if (modelType == LexicalReorderingConfiguration::MSD) {
reoType = GetOrientationTypeMSD(currWordsRange);
} else if (modelType == LexicalReorderingConfiguration::MSLR) {
reoType = GetOrientationTypeMSLR(currWordsRange);
} else if (modelType == LexicalReorderingConfiguration::Monotonic) {
reoType = GetOrientationTypeMonotonic(currWordsRange);
} else {
reoType = GetOrientationTypeLeftRight(currWordsRange);
}
CopyScores(scores, topt, reoType);
}
}
return new PhraseBasedReorderingState(this, topt);
}
LexicalReorderingState* HierarchicalReorderingBackwardState::Expand(const TranslationOption& topt, Scores& scores) const {
HierarchicalReorderingBackwardState* nextState = new HierarchicalReorderingBackwardState(this, topt, m_reoStack);
ReorderingType reoType;
const LexicalReorderingConfiguration::ModelType modelType = m_configuration.GetModelType();
int reoDistance = nextState->m_reoStack.ShiftReduce(topt.GetSourceWordsRange());
if (modelType == LexicalReorderingConfiguration::MSD) {
reoType = GetOrientationTypeMSD(reoDistance);
} else if (modelType == LexicalReorderingConfiguration::MSLR) {
reoType = GetOrientationTypeMSLR(reoDistance);
} else if (modelType == LexicalReorderingConfiguration::LeftRight) {
reoType = GetOrientationTypeLeftRight(reoDistance);
} else {
reoType = GetOrientationTypeMonotonic(reoDistance);
}
CopyScores(scores, topt, reoType);
return nextState;
}
