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/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2010 Hieu Hoang
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
***********************************************************************/
#pragma once
#include "StackVec.h"
#include "TargetPhrase.h"
#include "TargetPhraseCollection.h"
#include "WordsRange.h"
#include "util/check.hh"
#include <vector>
namespace Moses
{
/** Similar to a DottedRule, but contains a direct reference to a list
* of translations and provdes an estimate of the best score.
*/
class ChartTranslationOption
{
public:
ChartTranslationOption(const TargetPhraseCollection &targetPhraseColl,
const StackVec &stackVec,
const WordsRange &wordsRange,
float score)
: m_stackVec(stackVec)
, m_targetPhraseCollection(&targetPhraseColl)
, m_wordsRange(&wordsRange)
, m_estimateOfBestScore(score) {}
~ChartTranslationOption() {}
static float CalcEstimateOfBestScore(const TargetPhraseCollection &,
const StackVec &);
const StackVec &GetStackVec() const { return m_stackVec; }
const TargetPhraseCollection &GetTargetPhraseCollection() const {
return *m_targetPhraseCollection;
}
const WordsRange &GetSourceWordsRange() const {
return *m_wordsRange;
}
// return an estimate of the best score possible with this translation option.
// the estimate is the sum of the top target phrase's estimated score plus the
// scores of the best child hypotheses.
inline float GetEstimateOfBestScore() const { return m_estimateOfBestScore; }
private:
StackVec m_stackVec;
const TargetPhraseCollection *m_targetPhraseCollection;
const WordsRange *m_wordsRange;
float m_estimateOfBestScore;
};
}
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