PhraseLengthFeature.cpp
#include <sstream>
#include "PhraseLengthFeature.h"
#include "moses/Hypothesis.h"
#include "moses/ScoreComponentCollection.h"
#include "moses/TranslationOption.h"
namespace Moses
{
using namespace std;
PhraseLengthFeature::PhraseLengthFeature(const std::string &line)
:StatelessFeatureFunction(0, line)
{
ReadParameters();
}
void PhraseLengthFeature::EvaluateInIsolation(const Phrase &source
, const TargetPhrase &targetPhrase
, ScoreComponentCollection &scoreBreakdown
, ScoreComponentCollection &estimatedFutureScore) const
{
// get length of source and target phrase
size_t targetLength = targetPhrase.GetSize();
size_t sourceLength = source.GetSize();
// create feature names
stringstream nameSource;
nameSource << "s" << sourceLength;
stringstream nameTarget;
nameTarget << "t" << targetLength;
stringstream nameBoth;
nameBoth << sourceLength << "," << targetLength;
// increase feature counts
scoreBreakdown.PlusEquals(this,nameSource.str(),1);
scoreBreakdown.PlusEquals(this,nameTarget.str(),1);
scoreBreakdown.PlusEquals(this,nameBoth.str(),1);
//cerr << nameSource.str() << " " << nameTarget.str() << " " << nameBoth.str() << endl;
}
}