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https://github.com/moses-smt/mosesdecoder.git
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90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
// $Id$
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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 "DecodeStep.h"
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#include "GenerationDictionary.h"
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#include "StaticData.h"
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#include "moses/TranslationModel/PhraseDictionary.h"
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namespace Moses
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{
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DecodeStep::DecodeStep(const DecodeFeature *decodeFeature,
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const DecodeStep* prev,
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const std::vector<FeatureFunction*> &features)
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: m_decodeFeature(decodeFeature)
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{
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FactorMask prevOutputFactors;
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if (prev) prevOutputFactors = prev->m_outputFactors;
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m_outputFactors = prevOutputFactors;
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FactorMask conflictMask = (m_outputFactors & decodeFeature->GetOutputFactorMask());
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m_outputFactors |= decodeFeature->GetOutputFactorMask();
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FactorMask newOutputFactorMask = m_outputFactors ^ prevOutputFactors; //xor
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m_newOutputFactors.resize(newOutputFactorMask.count());
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m_conflictFactors.resize(conflictMask.count());
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size_t j=0, k=0;
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for (size_t i = 0; i < MAX_NUM_FACTORS; i++) {
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if (newOutputFactorMask[i]) m_newOutputFactors[j++] = i;
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if (conflictMask[i]) m_conflictFactors[k++] = i;
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}
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VERBOSE(2,"DecodeStep():\n\toutputFactors=" << m_outputFactors
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<< "\n\tconflictFactors=" << conflictMask
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<< "\n\tnewOutputFactors=" << newOutputFactorMask << std::endl);
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// find out which feature function can be applied in this decode step
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for (size_t i = 0; i < features.size(); ++i) {
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FeatureFunction *feature = features[i];
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if (feature->IsUseable(m_outputFactors)) {
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m_featuresToApply.push_back(feature);
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} else {
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m_featuresRemaining.push_back(feature);
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}
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}
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}
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DecodeStep::~DecodeStep() {}
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/** returns phrase feature (dictionary) for translation step */
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const PhraseDictionary* DecodeStep::GetPhraseDictionaryFeature() const
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{
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return dynamic_cast<const PhraseDictionary*>(m_decodeFeature);
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}
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/** returns generation feature (dictionary) for generation step */
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const GenerationDictionary* DecodeStep::GetGenerationDictionaryFeature() const
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{
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return dynamic_cast<const GenerationDictionary*>(m_decodeFeature);
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}
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void DecodeStep::RemoveFeature(const FeatureFunction *ff)
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{
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for (size_t i = 0; i < m_featuresToApply.size(); ++i) {
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if (ff == m_featuresToApply[i]) {
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m_featuresToApply.erase(m_featuresToApply.begin() + i);
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return;
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}
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}
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}
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}
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