void CRF::New(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
if (args.IsConstructCall()) {
// Invoked as constructor: `new CRF(...)`
CRF* obj = new CRF();
CRFPP::Tagger* tag = CRFPP::createTagger(get(args[0]));
if(!tag){
isolate->ThrowException(Exception::TypeError(
String::NewFromUtf8(isolate, (const char *) CRFPP::getTaggerError())));
return;
}
v8::Local<v8::External> handle = v8::External::New(isolate, tag);
v8::Persistent<v8::External, v8::CopyablePersistentTraits<v8::External> > tagger(isolate, handle);
obj -> tagger = tagger;
obj->Wrap(args.This());
args.GetReturnValue().Set(args.This());
} else {
const int argc = 1;
Local<Value> argv[argc] = { args[0] };
Local<Function> cons = Local<Function>::New(isolate, constructor);
args.GetReturnValue().Set(cons->NewInstance(argc, argv));
}
}
VectorFactorsExtractor::VectorFactorsExtractor(const CRF& i_crf, vector<double>* o_parameters)
{
o_parameters->clear();
const Factors& factors = i_crf.GetParameters();
const vector<double>& initialWeights = factors.GetInitialWeights();
const vector<double>& finalWeights = factors.GetFinalWeights();
const vector<double>& defaultWeights = factors.GetDefaultWeights();
numberOfLabels = i_crf.GetOutputAlphabet().Size();
numberOfFeatures = i_crf.GetInputAlphabet().Size();
numberOfCliques = i_crf.GetWeightsAlphabet().Size();
// Insert intial, final and default weights
dimension = 2 * numberOfLabels + numberOfCliques;
o_parameters->resize(dimension);
std::copy(initialWeights.begin(), initialWeights.end(),
o_parameters->begin());
std::copy(finalWeights.begin(), finalWeights.end(),
o_parameters->begin() + numberOfLabels);
std::copy(defaultWeights.begin(), defaultWeights.end(),
o_parameters->begin() + 2 * numberOfLabels);
cliqueFeatureConverter.resize(numberOfCliques);
const vector<unordered_map<int, double> >& cliquesData = factors.GetWeights();
// Iterate over cliques
for (size_t cliqueIndex = 0; cliqueIndex < cliquesData.size();
++cliqueIndex)
{
unordered_map<int, int> featureToPositionInVector;
const unordered_map<int, double>& currentCliquesData = cliquesData[cliqueIndex];
for (auto iter = currentCliquesData.begin(); iter != currentCliquesData.end(); ++iter)
{
o_parameters->push_back(iter->second);
featureToPositionInVector[iter->first] = dimension;
++dimension;
}
cliqueFeatureConverter[cliqueIndex] = std::move(featureToPositionInVector);
printf("\rVectorFactorsExtractor evaluated %zu cliques", cliqueIndex);
}
}
Handle<Value> CRF::New(const Arguments& args) {
HandleScope scope;
if (!args.IsConstructCall()) {
return ThrowException(Exception::TypeError(
String::New("Use the new operator to create instances of this object."))
);
}
if (args.Length() < 1) {
return ThrowException(Exception::TypeError(
String::New("First argument must be the path to the model")));
}
// Creates a new instance object of this type and wraps it.
CRF* obj = new CRF();
CRFPP::Tagger* tag = CRFPP::createTagger(get(args[0]));
if(!tag){
return ThrowException(Exception::TypeError(
String::New(CRFPP::getTaggerError())));
}
obj -> tagger = Persistent<CRFPP::Tagger>(tag);
obj->Wrap(args.This());
return args.This();
}
void CRFBinaryWriter::Write(const CRF& crf) const
{
std::ofstream out(file, std::ios::binary);
Tools::SetLocale(out);
if (!out)
{
std::wcout << L"Can't write to "
<< Tools::ConvertStringToWstring(file)
<< L" " << file.size()
<< std::endl;
exit(1);
}
// Printing alphabets;
crf.GetInputAlphabet().Print(out);
crf.GetOutputAlphabet().Print(out);
crf.GetWeightsAlphabet().Print(out);
// Printing States;
int stateSize = crf.GetNumStates();
out.write((char*)&stateSize, sizeof(int));
for (int stateIndex = 0; stateIndex < stateSize; stateIndex++)
{
const State& state = crf.GetStates()[stateIndex];
double initialWeight = crf.GetInitialWeights()[stateIndex];
out.write((char*)&initialWeight, sizeof(double));
double finalWeight = crf.GetFinalWeights()[stateIndex];
out.write((char*)&finalWeight, sizeof(double));
int numDestinations = state.GetNumDestinations();
out.write((char*)&numDestinations, sizeof(int));
for (int destIndex = 0; destIndex < numDestinations; ++destIndex)
{
out.write((char*)&state.GetDestinations()[destIndex], sizeof(int));
int weightIndexesLength = state.GetWeightsIndexes()[destIndex].size();
out.write((char*)&weightIndexesLength, sizeof(int));
for (int weightIndex = 0; weightIndex < weightIndexesLength; ++weightIndex)
{
out.write((char*)&state.GetWeightsIndexes()[destIndex][weightIndex],
sizeof(int));
}
}
}
// Printing weights;
const Factors& parameters = crf.GetParameters();
for (int widx = 0; widx < parameters.GetWeightAlphabet().Size(); ++widx)
{
double defaultWeight = parameters.GetDefaultWeights()[widx];
out.write((char*)&defaultWeight, sizeof(double));
const unordered_map<int, double>& transitionWeights = parameters.GetWeights()[widx];
int size = transitionWeights.size();
out.write((char*)&size, sizeof(int));
for (auto item : transitionWeights)
{
int index = item.first;
double value = item.second;
out.write((char*)&index, sizeof(int));
out.write((char*)&value, sizeof(double));
}
}
out.close();
}
