Handle<Value> DatasetBands::create(const Arguments& args)
{
HandleScope scope;
Handle<Object> parent = args.This()->GetHiddenValue(String::NewSymbol("parent_"))->ToObject();
Dataset *ds = ObjectWrap::Unwrap<Dataset>(parent);
if (ds->uses_ogr){
return NODE_THROW("Dataset does not support getting creating bands");
}
GDALDataset* raw = ds->getDataset();
if (!raw) {
return NODE_THROW("Dataset object has already been destroyed");
}
GDALDataType type;
Handle<Array> band_options = Array::New(0);
char **options = NULL;
std::string *options_str = NULL;
//NODE_ARG_ENUM(0, "data type", GDALDataType, type);
if(args.Length() < 1) {
return NODE_THROW("data type argument needed");
}
if(args[0]->IsString()){
std::string type_name = TOSTR(args[0]);
type = GDALGetDataTypeByName(type_name.c_str());
} else if (args[0]->IsNull() || args[0]->IsUndefined()) {
type = GDT_Unknown;
} else {
return NODE_THROW("data type must be string or undefined");
}
NODE_ARG_ARRAY_OPT(1, "band creation options", band_options);
if (band_options->Length() > 0) {
options = new char* [band_options->Length()];
options_str = new std::string [band_options->Length()];
for (unsigned int i = 0; i < band_options->Length(); ++i) {
options_str[i] = TOSTR(band_options->Get(i));
options[i] = (char*) options_str[i].c_str();
}
}
CPLErr err = raw->AddBand(type, options);
if(options) delete [] options;
if(options_str) delete [] options_str;
if (err) {
return NODE_THROW_CPLERR(err);
}
return scope.Close(RasterBand::New(raw->GetRasterBand(raw->GetRasterCount()), raw));
}
