mosesdecoder/moses/ChartTranslationOptions.h
2012-11-12 19:56:18 +00:00

88 lines
3.0 KiB
C++

/***********************************************************************
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. For a specific range in the input sentence
*/
class ChartTranslationOptions
{
public:
/** Constructor
\param targetPhraseColl @todo dunno
\param stackVec @todo dunno
\param wordsRange the range in the source sentence this translation option covers
\param score @todo dunno
*/
ChartTranslationOptions(const TargetPhraseCollection &targetPhraseColl,
const StackVec &stackVec,
const WordsRange &wordsRange,
float score)
: m_stackVec(stackVec)
, m_targetPhraseCollection(&targetPhraseColl)
, m_wordsRange(&wordsRange)
, m_estimateOfBestScore(score)
{}
~ChartTranslationOptions() {}
static float CalcEstimateOfBestScore(const TargetPhraseCollection &,
const StackVec &);
//! @todo dunno
const StackVec &GetStackVec() const { return m_stackVec; }
//! @todo isn't the translation suppose to just contain 1 target phrase, not a whole collection of them?
const TargetPhraseCollection &GetTargetPhraseCollection() const {
return *m_targetPhraseCollection;
}
//! the range in the source sentence this translation option covers
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; //! vector of hypothesis list!
const TargetPhraseCollection *m_targetPhraseCollection;
const WordsRange *m_wordsRange;
float m_estimateOfBestScore;
};
}