/// Parses osm json data from stream calling visitor.
void parse(std::istream &istream, Visitor &visitor) const {
istream.unsetf(std::ios::skipws);
ptree pt;
read_json(istream, pt);
for (const ptree::value_type &feature : pt) {
std::string featureName = feature.first;
std::uint32_t featureId = stringTable_.getId(featureName);
for (const ptree::value_type &f : pt.get_child(featureName).get_child("features")) {
const auto &type = f.second.get_child("geometry.type").data();
if (type=="Point")
parsePoint(visitor, featureId, f.second);
else if (type=="LineString")
parseLineString(visitor, featureId, f.second);
else if (type=="Polygon")
parsePolygon(visitor, featureId, f.second);
else if (type=="MultiLineString")
parseMultiLineString(visitor, featureId, f.second);
else if (type=="MultiPolygon")
parseMultiPolygon(visitor, featureId, f.second);
else
throw std::invalid_argument(std::string("Unknown geometry type:") + type);
}
}
}
bool GeoParser::parseGeometryCollection(const BSONObj &obj, GeometryCollection *out) {
BSONElement coordElt = obj.getFieldDotted(GEOJSON_GEOMETRIES);
const vector<BSONElement>& geometries = coordElt.Array();
for (size_t i = 0; i < geometries.size(); ++i) {
const BSONObj& geoObj = geometries[i].Obj();
if (isGeoJSONPoint(geoObj)) {
PointWithCRS point;
if (!parsePoint(geoObj, &point)) { return false; }
out->points.push_back(point);
} else if (isLine(geoObj)) {
out->lines.mutableVector().push_back(new LineWithCRS());
if (!parseLine(geoObj, out->lines.vector().back())) { return false; }
} else if (isGeoJSONPolygon(geoObj)) {
out->polygons.mutableVector().push_back(new PolygonWithCRS());
if (!parsePolygon(geoObj, out->polygons.vector().back())) { return false; }
} else if (isMultiPoint(geoObj)) {
out->multiPoints.mutableVector().push_back(new MultiPointWithCRS());
if (!parseMultiPoint(geoObj, out->multiPoints.mutableVector().back())) {
return false;
}
} else if (isMultiPolygon(geoObj)) {
out->multiPolygons.mutableVector().push_back(new MultiPolygonWithCRS());
if (!parseMultiPolygon(geoObj, out->multiPolygons.mutableVector().back())) {
return false;
}
} else {
verify(isMultiLine(geoObj));
out->multiLines.mutableVector().push_back(new MultiLineWithCRS());
if (!parseMultiLine(geoObj, out->multiLines.mutableVector().back())) {
return false;
}
}
}
return true;
}
