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#pragma once
#include <vector>
#include <string>
#include <set>
#include "StatefulFeatureFunction.h"
#include "FFState.h"
#include "moses/Phrase.h"
#include "moses/Factor.h"
#include "boost/unordered_map.hpp"
namespace Moses
{
// Given a file with reference translation, reward phrases for matching words from the reference.
class CoveredReferenceState : public FFState
{
public:
std::multiset<std::string> m_coveredRef;
virtual size_t hash() const;
virtual bool operator==(const FFState& other) const;
};
class CoveredReferenceFeature : public StatefulFeatureFunction
{
static std::multiset<std::string> GetWordsInPhrase(const Phrase &phr) {
std::multiset<std::string> out;
for (size_t i = 0; i < phr.GetSize(); i++) {
out.insert(phr.GetFactor(i, 0)->GetString().as_string());
}
return out;
}
std::string m_path;
boost::unordered_map<long, std::multiset<std::string> > m_refs;
public:
CoveredReferenceFeature(const std::string &line)
:StatefulFeatureFunction(1, line) {
m_tuneable = true;
ReadParameters();
}
void Load();
bool IsUseable(const FactorMask &mask) const {
return true;
}
virtual const FFState* EmptyHypothesisState(const InputType &input) const {
return new CoveredReferenceState();
}
void EvaluateWithSourceContext(const InputType &input
, const InputPath &inputPath
, const TargetPhrase &targetPhrase
, const StackVec *stackVec
, ScoreComponentCollection &scoreBreakdown
, ScoreComponentCollection *estimatedScores = NULL) const;
FFState* EvaluateWhenApplied(
const Hypothesis& cur_hypo,
const FFState* prev_state,
ScoreComponentCollection* accumulator) const;
FFState* EvaluateWhenApplied(
const ChartHypothesis& /* cur_hypo */,
int /* featureID - used to index the state in the previous hypotheses */,
ScoreComponentCollection* accumulator) const;
void SetParameter(const std::string& key, const std::string& value);
};
}
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