C++ (Cpp) OGRFeature::UnsetField Examples

Example #1

File: OgrWriter.cpp Project: giserh/hootenanny

void OgrWriter::_addFeature(OGRLayer* layer, shared_ptr<Feature> f, shared_ptr<Geometry> g)
{
  OGRFeature* poFeature = OGRFeature::CreateFeature( layer->GetLayerDefn() );

  // set all the column values.
  const QVariantMap& vm = f->getValues();

  for (QVariantMap::const_iterator it = vm.constBegin(); it != vm.constEnd(); ++it)
  {
    const QVariant& v = it.value();
    QByteArray ba = it.key().toUtf8();

    // If the field DOESN'T exist in the output layer, skip it.
    if (poFeature->GetFieldIndex(ba.constData()) == -1)
    {
      continue;
    }

    switch (v.type())
    {
    case QVariant::Invalid:
      poFeature->UnsetField(poFeature->GetFieldIndex(ba.constData()));
      break;
    case QVariant::Int:
      poFeature->SetField(ba.constData(), v.toInt());
      break;
    case QVariant::Double:
      poFeature->SetField(ba.constData(), v.toDouble());
      break;
    case QVariant::String:
    {
      QByteArray vba = v.toString().toUtf8();
      poFeature->SetField(ba.constData(), vba.constData());
      break;
    }
    default:
      strictError("Can't convert the provided value into an OGR value. (" + v.toString() + ")");
      return;
    }
  }

  // convert the geometry.
  shared_ptr<GeometryCollection> gc = dynamic_pointer_cast<GeometryCollection>(g);
  if (gc.get() != 0)
  {
    for (size_t i = 0; i < gc->getNumGeometries(); i++)
    {
      const Geometry* child = gc->getGeometryN(i);
      _addFeatureToLayer(layer, f, child, poFeature);
    }
  }
  else
  {
    _addFeatureToLayer(layer, f, g.get(), poFeature);
  }

  OGRFeature::DestroyFeature(poFeature);
}