mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-09-19 07:07:24 +03:00
251 lines
7.7 KiB
C++
251 lines
7.7 KiB
C++
#include <boost/algorithm/string.hpp>
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#include "AlignmentInfo.h"
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#include "PhrasePairFeature.h"
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#include "TargetPhrase.h"
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#include "Hypothesis.h"
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#include "TranslationOption.h"
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#include <boost/algorithm/string.hpp>
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using namespace std;
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namespace Moses {
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PhrasePairFeature::PhrasePairFeature(const std::string &line)
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:StatelessFeatureFunction("PhrasePairFeature", ScoreProducer::unlimited)
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{
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std::cerr << "Initializing PhrasePairFeature.." << std::endl;
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vector<string> tokens = Tokenize(line);
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//CHECK(tokens[0] == m_description);
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// set factor
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m_sourceFactorId = Scan<FactorType>(tokens[1]);
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m_targetFactorId = Scan<FactorType>(tokens[2]);
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m_unrestricted = Scan<bool>(tokens[3]);
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m_simple = Scan<bool>(tokens[4]);
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m_sourceContext = Scan<bool>(tokens[5]);
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m_domainTrigger = Scan<bool>(tokens[6]);
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m_sparseProducerWeight = 1;
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m_ignorePunctuation = Scan<bool>(tokens[6]);
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if (m_simple == 1) std::cerr << "using simple phrase pairs.. ";
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if (m_sourceContext == 1) std::cerr << "using source context.. ";
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if (m_domainTrigger == 1) std::cerr << "using domain triggers.. ";
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// compile a list of punctuation characters
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if (m_ignorePunctuation) {
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std::cerr << "ignoring punctuation for triggers.. ";
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char punctuation[] = "\"'!?¿·()#_,.:;•&@‑/\\0123456789~=";
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for (size_t i=0; i < sizeof(punctuation)-1; ++i)
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m_punctuationHash[punctuation[i]] = 1;
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}
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const string &filePathSource = tokens[7];
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Load(filePathSource);
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}
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bool PhrasePairFeature::Load(const std::string &filePathSource/*, const std::string &filePathTarget*/)
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{
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if (m_domainTrigger) {
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// domain trigger terms for each input document
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ifstream inFileSource(filePathSource.c_str());
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if (!inFileSource)
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{
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cerr << "could not open file " << filePathSource << endl;
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return false;
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}
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std::string line;
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while (getline(inFileSource, line)) {
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std::set<std::string> terms;
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vector<string> termVector;
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boost::split(termVector, line, boost::is_any_of("\t "));
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for (size_t i=0; i < termVector.size(); ++i)
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terms.insert(termVector[i]);
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// add term set for current document
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m_vocabDomain.push_back(terms);
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}
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inFileSource.close();
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}
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else {
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// restricted source word vocabulary
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ifstream inFileSource(filePathSource.c_str());
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if (!inFileSource)
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{
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cerr << "could not open file " << filePathSource << endl;
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return false;
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}
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std::string line;
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while (getline(inFileSource, line)) {
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m_vocabSource.insert(line);
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}
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inFileSource.close();
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/* // restricted target word vocabulary
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ifstream inFileTarget(filePathTarget.c_str());
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if (!inFileTarget)
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{
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cerr << "could not open file " << filePathTarget << endl;
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return false;
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}
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while (getline(inFileTarget, line)) {
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m_vocabTarget.insert(line);
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}
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inFileTarget.close();*/
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m_unrestricted = false;
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}
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return true;
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}
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void PhrasePairFeature::Evaluate(
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const PhraseBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const
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{
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const TargetPhrase& target = context.GetTargetPhrase();
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const Phrase& source = *(context.GetTranslationOption().GetSourcePhrase());
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if (m_simple) {
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ostringstream namestr;
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namestr << "pp_";
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namestr << source.GetWord(0).GetFactor(m_sourceFactorId)->GetString();
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for (size_t i = 1; i < source.GetSize(); ++i) {
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const Factor* sourceFactor = source.GetWord(i).GetFactor(m_sourceFactorId);
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namestr << ",";
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namestr << sourceFactor->GetString();
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}
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namestr << "~";
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namestr << target.GetWord(0).GetFactor(m_targetFactorId)->GetString();
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for (size_t i = 1; i < target.GetSize(); ++i) {
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const Factor* targetFactor = target.GetWord(i).GetFactor(m_targetFactorId);
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namestr << ",";
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namestr << targetFactor->GetString();
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}
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accumulator->SparsePlusEquals(namestr.str(),1);
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}
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if (m_domainTrigger) {
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const Sentence& input = static_cast<const Sentence&>(context.GetSource());
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const bool use_topicid = input.GetUseTopicId();
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const bool use_topicid_prob = input.GetUseTopicIdAndProb();
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// compute pair
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ostringstream pair;
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pair << source.GetWord(0).GetFactor(m_sourceFactorId)->GetString();
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for (size_t i = 1; i < source.GetSize(); ++i) {
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const Factor* sourceFactor = source.GetWord(i).GetFactor(m_sourceFactorId);
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pair << ",";
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pair << sourceFactor->GetString();
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}
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pair << "~";
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pair << target.GetWord(0).GetFactor(m_targetFactorId)->GetString();
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for (size_t i = 1; i < target.GetSize(); ++i) {
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const Factor* targetFactor = target.GetWord(i).GetFactor(m_targetFactorId);
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pair << ",";
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pair << targetFactor->GetString();
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}
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if (use_topicid || use_topicid_prob) {
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if(use_topicid) {
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// use topicid as trigger
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const long topicid = input.GetTopicId();
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stringstream feature;
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feature << "pp_";
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if (topicid == -1)
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feature << "unk";
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else
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feature << topicid;
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feature << "_";
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feature << pair.str();
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accumulator->SparsePlusEquals(feature.str(), 1);
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}
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else {
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// use topic probabilities
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const vector<string> &topicid_prob = *(input.GetTopicIdAndProb());
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if (atol(topicid_prob[0].c_str()) == -1) {
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stringstream feature;
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feature << "pp_unk_";
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feature << pair.str();
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accumulator->SparsePlusEquals(feature.str(), 1);
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}
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else {
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for (size_t i=0; i+1 < topicid_prob.size(); i+=2) {
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stringstream feature;
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feature << "pp_";
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feature << topicid_prob[i];
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feature << "_";
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feature << pair.str();
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accumulator->SparsePlusEquals(feature.str(), atof((topicid_prob[i+1]).c_str()));
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}
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}
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}
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}
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else {
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// range over domain trigger words
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const long docid = input.GetDocumentId();
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for (set<string>::const_iterator p = m_vocabDomain[docid].begin(); p != m_vocabDomain[docid].end(); ++p) {
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string sourceTrigger = *p;
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ostringstream namestr;
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namestr << "pp_";
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namestr << sourceTrigger;
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namestr << "_";
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namestr << pair.str();
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accumulator->SparsePlusEquals(namestr.str(),1);
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}
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}
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}
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if (m_sourceContext) {
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const Sentence& input = static_cast<const Sentence&>(context.GetSource());
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// range over source words to get context
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for(size_t contextIndex = 0; contextIndex < input.GetSize(); contextIndex++ ) {
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string sourceTrigger = input.GetWord(contextIndex).GetFactor(m_sourceFactorId)->GetString();
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if (m_ignorePunctuation) {
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// check if trigger is punctuation
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char firstChar = sourceTrigger.at(0);
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CharHash::const_iterator charIterator = m_punctuationHash.find( firstChar );
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if(charIterator != m_punctuationHash.end())
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continue;
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}
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bool sourceTriggerExists = false;
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if (!m_unrestricted)
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sourceTriggerExists = m_vocabSource.find( sourceTrigger ) != m_vocabSource.end();
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if (m_unrestricted || sourceTriggerExists) {
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ostringstream namestr;
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namestr << "pp_";
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namestr << sourceTrigger;
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namestr << "~";
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namestr << source.GetWord(0).GetFactor(m_sourceFactorId)->GetString();
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for (size_t i = 1; i < source.GetSize(); ++i) {
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const Factor* sourceFactor = source.GetWord(i).GetFactor(m_sourceFactorId);
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namestr << ",";
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namestr << sourceFactor->GetString();
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}
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namestr << "~";
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namestr << target.GetWord(0).GetFactor(m_targetFactorId)->GetString();
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for (size_t i = 1; i < target.GetSize(); ++i) {
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const Factor* targetFactor = target.GetWord(i).GetFactor(m_targetFactorId);
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namestr << ",";
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namestr << targetFactor->GetString();
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}
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accumulator->SparsePlusEquals(namestr.str(),1);
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}
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}
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}
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}
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bool PhrasePairFeature::ComputeValueInTranslationOption() const {
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return true;
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}
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}
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