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https://github.com/moses-smt/mosesdecoder.git
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142 lines
4.2 KiB
C++
142 lines
4.2 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 <fstream>
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#include <string>
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#include "GenerationDictionary.h"
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#include "FactorCollection.h"
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#include "Word.h"
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#include "Util.h"
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#include "InputFileStream.h"
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#include "StaticData.h"
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#include "util/exception.hh"
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using namespace std;
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namespace Moses
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{
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std::vector<GenerationDictionary*> GenerationDictionary::s_staticColl;
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GenerationDictionary::GenerationDictionary(const std::string &line)
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: DecodeFeature(line)
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{
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s_staticColl.push_back(this);
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ReadParameters();
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}
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void GenerationDictionary::Load()
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{
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FactorCollection &factorCollection = FactorCollection::Instance();
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const size_t numFeatureValuesInConfig = this->GetNumScoreComponents();
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// data from file
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InputFileStream inFile(m_filePath);
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UTIL_THROW_IF2(!inFile.good(), "Couldn't read " << m_filePath);
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string line;
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size_t lineNum = 0;
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while(getline(inFile, line)) {
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++lineNum;
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vector<string> token = Tokenize( line );
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// add each line in generation file into class
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Word *inputWord = new Word(); // deleted in destructor
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Word outputWord;
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// create word with certain factors filled out
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// inputs
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vector<string> factorString = Tokenize( token[0], "|" );
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for (size_t i = 0 ; i < GetInput().size() ; i++) {
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FactorType factorType = GetInput()[i];
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const Factor *factor = factorCollection.AddFactor( Output, factorType, factorString[i]);
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inputWord->SetFactor(factorType, factor);
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}
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factorString = Tokenize( token[1], "|" );
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for (size_t i = 0 ; i < GetOutput().size() ; i++) {
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FactorType factorType = GetOutput()[i];
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const Factor *factor = factorCollection.AddFactor( Output, factorType, factorString[i]);
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outputWord.SetFactor(factorType, factor);
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}
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size_t numFeaturesInFile = token.size() - 2;
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if (numFeaturesInFile < numFeatureValuesInConfig) {
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stringstream strme;
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strme << m_filePath << ":" << lineNum << ": expected " << numFeatureValuesInConfig
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<< " feature values, but found " << numFeaturesInFile << std::endl;
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throw strme.str();
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}
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std::vector<float> scores(numFeatureValuesInConfig, 0.0f);
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for (size_t i = 0; i < numFeatureValuesInConfig; i++)
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scores[i] = FloorScore(TransformScore(Scan<float>(token[2+i])));
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Collection::iterator iterWord = m_collection.find(inputWord);
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if (iterWord == m_collection.end()) {
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m_collection[inputWord][outputWord].Assign(this, scores);
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} else {
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// source word already in there. delete input word to avoid mem leak
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(iterWord->second)[outputWord].Assign(this, scores);
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delete inputWord;
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}
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}
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inFile.Close();
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}
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GenerationDictionary::~GenerationDictionary()
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{
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Collection::const_iterator iter;
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for (iter = m_collection.begin() ; iter != m_collection.end() ; ++iter) {
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delete iter->first;
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}
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}
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const OutputWordCollection *GenerationDictionary::FindWord(const Word &word) const
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{
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const OutputWordCollection *ret;
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Collection::const_iterator iter = m_collection.find(&word);
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if (iter == m_collection.end()) {
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// can't find source phrase
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ret = NULL;
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} else {
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ret = &iter->second;
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}
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return ret;
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}
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void GenerationDictionary::SetParameter(const std::string& key, const std::string& value)
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{
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if (key == "path") {
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m_filePath = value;
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} else {
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DecodeFeature::SetParameter(key, value);
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}
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}
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}
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