/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2014 Artem Pavlenko * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * *****************************************************************************/ // stl #include <stdexcept> #include <set> // mapnik #include <mapnik/debug.hpp> #include <mapnik/geom_util.hpp> #include <mapnik/query.hpp> #include <mapnik/boolean.hpp> // boost #include "osm_datasource.hpp" #include "osm_featureset.hpp" #include "dataset_deliverer.h" #include "osmtagtypes.h" #include "osmparser.h" using mapnik::String; using mapnik::Double; using mapnik::Integer; using mapnik::datasource_exception; using mapnik::filter_in_box; using mapnik::filter_at_point; using mapnik::attribute_descriptor; DATASOURCE_PLUGIN(osm_datasource) osm_datasource::osm_datasource(const parameters& params) : datasource (params), extent_(), type_(datasource::Vector), desc_(osm_datasource::name(), *params.get<std::string>("encoding", "utf-8")) { osm_data_ = nullptr; std::string osm_filename = *params.get<std::string>("file", ""); std::string parser = *params.get<std::string>("parser", "libxml2"); std::string url = *params.get<std::string>("url", ""); std::string bbox = *params.get<std::string>("bbox", ""); // load the data if (url != "" && bbox != "") { throw datasource_exception("Error loading from URL is no longer supported (removed in >= Mapnik 2.3.x"); } else if (osm_filename != "") { // if we supplied a filename, load from file if ((osm_data_ = dataset_deliverer::load_from_file(osm_filename, parser)) == nullptr) { std::string s("OSM Plugin: Error loading from file '"); s += osm_filename + "'"; throw datasource_exception(s); } } else { throw datasource_exception("OSM Plugin: Neither 'file' nor 'url' and 'bbox' specified"); } osm_tag_types tagtypes; tagtypes.add_type("maxspeed", mapnik::Integer); tagtypes.add_type("z_order", mapnik::Integer); osm_data_->rewind(); // Need code to get the attributes of all the data std::set<std::string> keys = osm_data_->get_keys(); // Add the attributes to the datasource descriptor - assume they are // all of type String for (auto const& key : keys) { desc_.add_descriptor(attribute_descriptor(key, tagtypes.get_type(key))); } // Get the bounds of the data and set extent_ accordingly bounds b = osm_data_->get_bounds(); extent_ = box2d<double>(b.w,b.s,b.e,b.n); } osm_datasource::~osm_datasource() { // Do not do as is now static variable and cleaned up at exit //delete osm_data_; } const char * osm_datasource::name() { return "osm"; } mapnik::datasource::datasource_t osm_datasource::type() const { return type_; } layer_descriptor osm_datasource::get_descriptor() const { return desc_; } featureset_ptr osm_datasource::features(const query& q) const { filter_in_box filter(q.get_bbox()); // so we need to filter osm features by bbox here... return std::make_shared<osm_featureset<filter_in_box> >(filter, osm_data_, q.property_names(), desc_.get_encoding()); } featureset_ptr osm_datasource::features_at_point(coord2d const& pt, double tol) const { filter_at_point filter(pt); // collect all attribute names std::set<std::string> names; for (auto const& elem : desc_.get_descriptors()) { names.insert(elem.get_name()); } return std::make_shared<osm_featureset<filter_at_point> >(filter, osm_data_, names, desc_.get_encoding()); } box2d<double> osm_datasource::envelope() const { return extent_; } boost::optional<mapnik::datasource::geometry_t> osm_datasource::get_geometry_type() const { return boost::optional<mapnik::datasource::geometry_t>(mapnik::datasource::Collection); }