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134 lines
3.7 KiB
C++
134 lines
3.7 KiB
C++
// $Id$
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// vim:tabstop=2
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/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2010 Hieu Hoang
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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***********************************************************************/
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#pragma once
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#include <iostream>
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#include <queue>
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#include <map>
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#include <vector>
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#include "Word.h"
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#include "WordsRange.h"
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#include "NonTerminal.h"
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#include "ChartHypothesis.h"
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#include "ChartHypothesisCollection.h"
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#include "RuleCube.h"
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#include "ChartCellLabelSet.h"
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#include <boost/scoped_ptr.hpp>
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#include <boost/functional/hash.hpp>
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#include <boost/unordered_map.hpp>
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#include <boost/version.hpp>
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namespace Moses
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{
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class ChartSearchGraphWriter;
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class ChartTranslationOptionList;
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class ChartCellCollection;
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class ChartManager;
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class ChartCellBase
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{
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public:
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ChartCellBase(size_t startPos, size_t endPos);
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virtual ~ChartCellBase();
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const ChartCellLabelSet &GetTargetLabelSet() const {
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return m_targetLabelSet;
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}
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ChartCellLabelSet &MutableTargetLabelSet() {
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return m_targetLabelSet;
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}
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const WordsRange &GetCoverage() const {
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return m_coverage;
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}
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protected:
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const WordsRange m_coverage;
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ChartCellLabelSet m_targetLabelSet;
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};
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/** 1 cell in chart decoder.
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* Doesn't directly hold hypotheses. Each cell contain a map of ChartHypothesisCollection that have different constituent labels
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*/
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class ChartCell : public ChartCellBase
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{
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friend std::ostream& operator<<(std::ostream&, const ChartCell&);
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public:
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#if defined(BOOST_VERSION) && (BOOST_VERSION >= 104200)
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typedef boost::unordered_map<Word,
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ChartHypothesisCollection,
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NonTerminalHasher,
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NonTerminalEqualityPred
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> MapType;
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#else
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typedef std::map<Word, ChartHypothesisCollection> MapType;
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#endif
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protected:
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MapType m_hypoColl;
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bool m_nBestIsEnabled; /**< flag to determine whether to keep track of old arcs */
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ChartManager &m_manager;
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public:
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ChartCell(size_t startPos, size_t endPos, ChartManager &manager);
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~ChartCell();
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void Decode(const ChartTranslationOptionList &transOptList
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,const ChartCellCollection &allChartCells);
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//! Get all hypotheses in the cell that have the specified constituent label
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const HypoList *GetSortedHypotheses(const Word &constituentLabel) const {
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MapType::const_iterator p = m_hypoColl.find(constituentLabel);
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return (p == m_hypoColl.end()) ? NULL : &(p->second.GetSortedHypotheses());
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}
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//! for n-best list
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const HypoList *GetAllSortedHypotheses() const;
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bool AddHypothesis(ChartHypothesis *hypo);
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void SortHypotheses();
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void PruneToSize();
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const ChartHypothesis *GetBestHypothesis() const;
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void CleanupArcList();
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void OutputSizes(std::ostream &out) const;
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size_t GetSize() const;
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//! transitive comparison used for adding objects into set
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inline bool operator<(const ChartCell &compare) const {
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return m_coverage < compare.m_coverage;
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}
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void WriteSearchGraph(const ChartSearchGraphWriter& writer, const std::map<unsigned,bool> &reachable) const;
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};
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}
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