bool RuleTableLoaderStandard::Load(FormatType format
, const std::vector<FactorType> &input
, const std::vector<FactorType> &output
, const std::string &inFile
, const std::vector<float> &weight
, size_t /* tableLimit */
, const LMList &languageModels
, const WordPenaltyProducer* wpProducer
, RuleTableTrie &ruleTable)
{
PrintUserTime(string("Start loading text SCFG phrase table. ") + (format==MosesFormat?"Moses ":"Hiero ") + " format");
const StaticData &staticData = StaticData::Instance();
const std::string& factorDelimiter = staticData.GetFactorDelimiter();
string lineOrig;
size_t count = 0;
std::ostream *progress = NULL;
IFVERBOSE(1) progress = &std::cerr;
util::FilePiece in(inFile.c_str(), progress);
// reused variables
vector<float> scoreVector;
StringPiece line;
std::string hiero_before, hiero_after;
while(true) {
try {
line = in.ReadLine();
} catch (const util::EndOfFileException &e) { break; }
if (format == HieroFormat) { // inefficiently reformat line
hiero_before.assign(line.data(), line.size());
ReformatHieroRule(hiero_before, hiero_after);
line = hiero_after;
}
util::TokenIter<util::MultiCharacter> pipes(line, "|||");
StringPiece sourcePhraseString(*pipes);
StringPiece targetPhraseString(*++pipes);
StringPiece scoreString(*++pipes);
StringPiece alignString(*++pipes);
// TODO(bhaddow) efficiently handle default instead of parsing this string every time.
StringPiece ruleCountString = ++pipes ? *pipes : StringPiece("1 1");
if (++pipes) {
stringstream strme;
strme << "Syntax error at " << ruleTable.GetFilePath() << ":" << count;
UserMessage::Add(strme.str());
abort();
}
bool isLHSEmpty = (sourcePhraseString.find_first_not_of(" \t", 0) == string::npos);
if (isLHSEmpty && !staticData.IsWordDeletionEnabled()) {
TRACE_ERR( ruleTable.GetFilePath() << ":" << count << ": pt entry contains empty target, skipping\n");
continue;
}
scoreVector.clear();
for (util::TokenIter<util::AnyCharacter, true> s(scoreString, " \t"); s; ++s) {
char *err_ind;
scoreVector.push_back(strtod(s->data(), &err_ind));
UTIL_THROW_IF(err_ind == s->data(), util::Exception, "Bad score " << *s << " on line " << count);
}
const size_t numScoreComponents = ruleTable.GetFeature()->GetNumScoreComponents();
if (scoreVector.size() != numScoreComponents) {
stringstream strme;
strme << "Size of scoreVector != number (" << scoreVector.size() << "!="
<< numScoreComponents << ") of score components on line " << count;
UserMessage::Add(strme.str());
abort();
}
// parse source & find pt node
// constituent labels
Word sourceLHS, targetLHS;
// source
Phrase sourcePhrase( 0);
sourcePhrase.CreateFromStringNewFormat(Input, input, sourcePhraseString, factorDelimiter, sourceLHS);
// create target phrase obj
TargetPhrase *targetPhrase = new TargetPhrase(Output);
targetPhrase->CreateFromStringNewFormat(Output, output, targetPhraseString, factorDelimiter, targetLHS);
targetPhrase->SetSourcePhrase(sourcePhrase);
// rest of target phrase
targetPhrase->SetAlignmentInfo(alignString, sourcePhrase);
targetPhrase->SetTargetLHS(targetLHS);
targetPhrase->SetRuleCount(ruleCountString, scoreVector[0]);
//targetPhrase->SetDebugOutput(string("New Format pt ") + line);
// component score, for n-best output
std::transform(scoreVector.begin(),scoreVector.end(),scoreVector.begin(),TransformScore);
std::transform(scoreVector.begin(),scoreVector.end(),scoreVector.begin(),FloorScore);
targetPhrase->SetScoreChart(ruleTable.GetFeature(), scoreVector, weight, languageModels,wpProducer);
TargetPhraseCollection &phraseColl = GetOrCreateTargetPhraseCollection(ruleTable, sourcePhrase, *targetPhrase, sourceLHS);
phraseColl.Add(targetPhrase);
count++;
}
// sort and prune each target phrase collection
SortAndPrune(ruleTable);
return true;
}
