2016-01-12 21:44:39 +03:00
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// $Id$
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/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2006 University of Edinburgh
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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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#include "lm/binary_format.hh"
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#include "lm/enumerate_vocab.hh"
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#include "lm/left.hh"
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#include "lm/model.hh"
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#include "moses/FF/FFState.h"
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#include "moses/Hypothesis.h"
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#include "moses/Phrase.h"
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#include "moses/LM/Ken.h"
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#include "moses/LM/Reloading.h"
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#include "util/exception.hh"
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//#include "moses/Util.h"
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//#include "moses/StaticData.h"
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//#include <iostream>
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2016-01-12 23:36:14 +03:00
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/*
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2016-01-12 21:44:39 +03:00
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namespace Moses
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{
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namespace
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{
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struct ReloadingLMState : public FFState {
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lm::ngram::State state;
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virtual size_t hash() const {
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return 0;
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}
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virtual bool operator==(const FFState& o) const {
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return true;
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}
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};
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} // namespace
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2016-01-12 23:36:14 +03:00
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2016-01-12 21:44:39 +03:00
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template <class Model> ReloadingLanguageModel<Model>::ReloadingLanguageModel(const std::string &line, const std::string &file, FactorType factorType, bool lazy) : LanguageModelKen<Model>(line,file,factorType,lazy)
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{
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//
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// This space intentionally left blank
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//
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}
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2016-01-12 23:36:14 +03:00
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template <class Model> const FFState *ReloadingLanguageModel<Model>::EmptyHypothesisState(const InputType &input) const
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2016-01-12 21:44:39 +03:00
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{
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ReloadingLMState *ret = new ReloadingLMState();
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ret->state = m_ngram->BeginSentenceState();
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return ret;
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}
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template <class Model> FFState *ReloadingLanguageModel<Model>::EvaluateWhenApplied(const Hypothesis &hypo, const FFState *ps, ScoreComponentCollection *out) const
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{
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std::auto_ptr<FFState> kenlmState(LanguageModelKen<Model>::EvaluateWhenApplied(hypo, ps, out));
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const lm::ngram::State &out_state = static_cast<const ReloadingLMState&>(*kenlmState).state;
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2016-01-14 03:00:42 +03:00
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2016-01-12 21:44:39 +03:00
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std::auto_ptr<ReloadingLMState> ret(new ReloadingLMState());
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ret->state = out_state;
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kenlmState.release();
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return ret.release();
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}
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LanguageModel *ConstructReloadingLM(const std::string &line, const std::string &file, FactorType factorType, bool lazy)
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{
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lm::ngram::ModelType model_type;
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if (lm::ngram::RecognizeBinary(file.c_str(), model_type)) {
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switch(model_type) {
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case lm::ngram::PROBING:
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return new ReloadingLanguageModel<lm::ngram::ProbingModel>(line, file, factorType, lazy);
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case lm::ngram::REST_PROBING:
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return new ReloadingLanguageModel<lm::ngram::RestProbingModel>(line, file, factorType, lazy);
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case lm::ngram::TRIE:
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return new ReloadingLanguageModel<lm::ngram::TrieModel>(line, file, factorType, lazy);
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case lm::ngram::QUANT_TRIE:
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return new ReloadingLanguageModel<lm::ngram::QuantTrieModel>(line, file, factorType, lazy);
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case lm::ngram::ARRAY_TRIE:
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return new ReloadingLanguageModel<lm::ngram::ArrayTrieModel>(line, file, factorType, lazy);
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case lm::ngram::QUANT_ARRAY_TRIE:
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return new ReloadingLanguageModel<lm::ngram::QuantArrayTrieModel>(line, file, factorType, lazy);
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default:
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UTIL_THROW2("Unrecognized kenlm model type " << model_type);
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}
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} else {
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return new ReloadingLanguageModel<lm::ngram::ProbingModel>(line, file, factorType, lazy);
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}
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}
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} // namespace Moses
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2016-01-12 23:36:14 +03:00
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*/
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