326 lines
12 KiB
C++
326 lines
12 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2016 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include "process_geojson_file_x3.hpp"
|
|
|
|
#if defined(MAPNIK_MEMORY_MAPPED_FILE)
|
|
#pragma GCC diagnostic push
|
|
#include <mapnik/warning_ignore.hpp>
|
|
#include <boost/interprocess/mapped_region.hpp>
|
|
#include <boost/interprocess/streams/bufferstream.hpp>
|
|
#include <boost/spirit/home/x3.hpp>
|
|
#pragma GCC diagnostic pop
|
|
#include <mapnik/mapped_memory_cache.hpp>
|
|
#else
|
|
#include <mapnik/util/file_io.hpp>
|
|
#endif
|
|
#include <mapnik/feature.hpp>
|
|
#include <mapnik/json/json_grammar_config.hpp>
|
|
#include <mapnik/json/geojson_grammar_x3.hpp>
|
|
#include <mapnik/json/unicode_string_grammar_x3.hpp>
|
|
#include <mapnik/json/positions_grammar_x3.hpp>
|
|
#include <mapnik/json/extract_bounding_boxes_x3.hpp>
|
|
|
|
namespace {
|
|
|
|
constexpr mapnik::json::well_known_names feature_properties[] = {
|
|
mapnik::json::well_known_names::type,
|
|
mapnik::json::well_known_names::geometry,
|
|
mapnik::json::well_known_names::properties}; // sorted
|
|
|
|
constexpr mapnik::json::well_known_names geometry_properties[] = {
|
|
mapnik::json::well_known_names::type,
|
|
mapnik::json::well_known_names::coordinates}; // sorted
|
|
|
|
template <typename Keys>
|
|
std::string join(Keys const& keys)
|
|
{
|
|
std::string result;
|
|
bool first = true;
|
|
for (auto const& key : keys)
|
|
{
|
|
if (!first) result += ",";
|
|
result += "\"" + std::string(mapnik::json::wkn_to_string(key)) + "\"";
|
|
first = false;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
template <typename Iterator, typename Keys>
|
|
bool has_keys(Iterator first1, Iterator last1, Keys const& keys)
|
|
{
|
|
auto first2 = std::begin(keys);
|
|
auto last2 = std::end(keys);
|
|
for (; first2 != last2; ++first1)
|
|
{
|
|
if (first1 == last1 || *first2 < std::get<0>(*first1))
|
|
return false;
|
|
if (!(std::get<0>(*first1) < *first2))
|
|
++first2;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
template <typename Keys>
|
|
bool validate_geojson_feature(mapnik::json::geojson_value & value, Keys const& keys, bool verbose)
|
|
{
|
|
if (!value.is<mapnik::json::geojson_object>())
|
|
{
|
|
if (verbose) std::clog << "Expecting an GeoJSON object" << std::endl;
|
|
return false;
|
|
}
|
|
mapnik::json::geojson_object & feature = mapnik::util::get<mapnik::json::geojson_object>(value);
|
|
std::sort(feature.begin(), feature.end(), [](auto const& e0, auto const& e1)
|
|
{
|
|
return std::get<0>(e0) < std::get<0>(e1);
|
|
});
|
|
|
|
if (!has_keys(feature.begin(), feature.end(), feature_properties))
|
|
{
|
|
if (verbose) std::clog << "Expecting one of " << join(feature_properties) << std::endl;
|
|
return false;
|
|
}
|
|
|
|
for (auto & elem : feature)
|
|
{
|
|
auto const key = std::get<0>(elem);
|
|
if (key == mapnik::json::well_known_names::geometry)
|
|
{
|
|
auto & geom_value = std::get<1>(elem);
|
|
if (!geom_value.is<mapnik::json::geojson_object>())
|
|
{
|
|
if (verbose) std::clog << "\"geometry\": xxx <-- expecting an JSON object here" << std::endl;
|
|
return false;
|
|
}
|
|
auto & geometry = mapnik::util::get<mapnik::json::geojson_object>(geom_value);
|
|
// sort by property name
|
|
std::sort(geometry.begin(), geometry.end(), [](auto const& e0, auto const& e1)
|
|
{
|
|
return std::get<0>(e0) < std::get<0>(e1);
|
|
});
|
|
if (!has_keys(geometry.begin(), geometry.end(), geometry_properties))
|
|
{
|
|
if (verbose) std::clog << "Expecting one of " << join(geometry_properties) << std::endl;
|
|
return false;
|
|
}
|
|
|
|
mapnik::geometry::geometry_types geom_type;
|
|
mapnik::json::positions const* coordinates = nullptr;
|
|
for (auto & elem2 : geometry)
|
|
{
|
|
auto const key2 = std::get<0>(elem2);
|
|
if (key2 == mapnik::json::well_known_names::type)
|
|
{
|
|
auto const& geom_type_value = std::get<1>(elem2);
|
|
if (!geom_type_value.is<mapnik::geometry::geometry_types>())
|
|
{
|
|
if (verbose) std::clog << "\"type\": xxx <-- expecting an GeoJSON geometry type here" << std::endl;
|
|
return false;
|
|
}
|
|
geom_type = mapnik::util::get<mapnik::geometry::geometry_types>(geom_type_value);
|
|
if (geom_type == mapnik::geometry::geometry_types::GeometryCollection)
|
|
{
|
|
if (verbose) std::clog << "GeometryCollections are not allowed" << std::endl;;
|
|
return false;
|
|
}
|
|
}
|
|
else if (key2 == mapnik::json::well_known_names::coordinates)
|
|
{
|
|
auto const& coordinates_value = std::get<1>(elem2);
|
|
if (!coordinates_value.is<mapnik::json::positions>())
|
|
{
|
|
if (verbose) std::clog << "\"coordinates\": xxx <-- expecting an GeoJSON positions here" << std::endl;
|
|
return false;
|
|
}
|
|
coordinates = &mapnik::util::get<mapnik::json::positions>(coordinates_value);
|
|
}
|
|
}
|
|
if (geom_type == mapnik::geometry::geometry_types::Point)
|
|
{
|
|
// expecting single position
|
|
if (!coordinates->is<mapnik::json::point>())
|
|
{
|
|
if (verbose) std::clog << "Expecting single position in Point" << std::endl;
|
|
return false;
|
|
}
|
|
}
|
|
else if (geom_type == mapnik::geometry::geometry_types::LineString)
|
|
{
|
|
// expecting
|
|
if (!coordinates->is<mapnik::json::ring>())
|
|
{
|
|
if (verbose) std::clog << "Expecting sequence of positions (ring) in LineString" << std::endl;
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
auto const& ring = mapnik::util::get<mapnik::json::ring>(*coordinates);
|
|
if (ring.size() < 2)
|
|
{
|
|
if (verbose) std::clog << "Expecting at least two coordinates in LineString" << std::endl;
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
else if (geom_type == mapnik::geometry::geometry_types::Polygon)
|
|
{
|
|
// expecting
|
|
if (!coordinates->is<mapnik::json::rings>())
|
|
{
|
|
if (verbose) std::clog << "Expecting an array of rings in Polygon" << std::endl;
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
auto const& rings = mapnik::util::get<mapnik::json::rings>(*coordinates);
|
|
if (rings.size() < 1)
|
|
{
|
|
if (verbose) std::clog << "Expecting at least one ring in Polygon" << std::endl;
|
|
return false;
|
|
}
|
|
for (auto const& ring : rings)
|
|
{
|
|
if (ring.size() < 4)
|
|
{
|
|
if (verbose) std::clog << "Expecting at least four coordinates in Polygon ring" << std::endl;
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
};
|
|
|
|
using box_type = mapnik::box2d<float>;
|
|
using boxes_type = std::vector<std::pair<box_type, std::pair<std::size_t, std::size_t>>>;
|
|
using base_iterator_type = char const*;
|
|
|
|
auto const& geojson_value = mapnik::json::geojson_grammar();
|
|
|
|
}
|
|
|
|
namespace mapnik { namespace detail {
|
|
|
|
|
|
template <typename T>
|
|
std::pair<bool,typename T::value_type::first_type> process_geojson_file_x3(T & boxes, std::string const& filename, bool validate_features, bool verbose)
|
|
{
|
|
using box_type = typename T::value_type::first_type;
|
|
box_type extent;
|
|
#if defined(MAPNIK_MEMORY_MAPPED_FILE)
|
|
mapnik::mapped_region_ptr mapped_region;
|
|
boost::optional<mapnik::mapped_region_ptr> memory =
|
|
mapnik::mapped_memory_cache::instance().find(filename, true);
|
|
if (!memory)
|
|
{
|
|
std::clog << "Error : cannot memory map " << filename << std::endl;
|
|
return std::make_pair(false, extent);
|
|
}
|
|
else
|
|
{
|
|
mapped_region = *memory;
|
|
}
|
|
base_iterator_type start = reinterpret_cast<base_iterator_type>(mapped_region->get_address());
|
|
base_iterator_type end = start + mapped_region->get_size();
|
|
#else
|
|
mapnik::util::file file(filename);
|
|
if (!file)
|
|
{
|
|
std::clog << "Error : cannot open " << filename << std::endl;
|
|
return std::make_pair(false, extent);
|
|
}
|
|
std::string file_buffer;
|
|
file_buffer.resize(file.size());
|
|
std::fread(&file_buffer[0], file.size(), 1, file.get());
|
|
base_iterator_type start = file_buffer.c_str();
|
|
base_iterator_type end = start + file_buffer.length();
|
|
#endif
|
|
|
|
try
|
|
{
|
|
mapnik::json::extract_bounding_boxes(start, end, boxes);
|
|
}
|
|
catch (boost::spirit::x3::expectation_failure<base_iterator_type> const& ex)
|
|
{
|
|
std::clog << ex.what() << std::endl;
|
|
std::clog << "Expected: " << ex.which();
|
|
std::clog << " Got: \"" << std::string(ex.where(), ex.where() + 200) << '"' << std::endl;
|
|
return std::make_pair(false, extent);
|
|
}
|
|
catch (std::exception const& ex)
|
|
{
|
|
std::clog << "mapnik-index (GeoJSON) : could not extract bounding boxes from : '" << filename << "'" << std::endl;
|
|
return std::make_pair(false, extent);
|
|
}
|
|
|
|
using namespace boost::spirit;
|
|
|
|
//using space_type = mapnik::json::grammar::space_type;
|
|
//auto keys = mapnik::json::get_keys();
|
|
//auto feature_grammar = x3::with<mapnik::json::keys_tag>(std::ref(keys))
|
|
// [ geojson_value ];
|
|
for (auto const& item : boxes)
|
|
{
|
|
if (item.first.valid())
|
|
{
|
|
if (!extent.valid()) extent = item.first;
|
|
else extent.expand_to_include(item.first);
|
|
#if 0
|
|
if (validate_features)
|
|
{
|
|
base_iterator_type feat_itr = start + item.second.first;
|
|
base_iterator_type feat_end = feat_itr + item.second.second;
|
|
mapnik::json::geojson_value feature_value;
|
|
try
|
|
{
|
|
bool result = x3::phrase_parse(feat_itr, feat_end, feature_grammar, space_type(), feature_value);
|
|
if (!result || feat_itr != feat_end)
|
|
{
|
|
if (verbose) std::clog << std::string(start + item.second.first, feat_end ) << std::endl;
|
|
return std::make_pair(false, extent);
|
|
}
|
|
}
|
|
catch (x3::expectation_failure<std::string::const_iterator> const& ex)
|
|
{
|
|
if (verbose) std::clog << ex.what() << std::endl;
|
|
return std::make_pair(false, extent);
|
|
}
|
|
catch (...)
|
|
{
|
|
return std::make_pair(false, extent);
|
|
}
|
|
if (!validate_geojson_feature(feature_value, keys, verbose))
|
|
{
|
|
return std::make_pair(false, extent);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
return std::make_pair(true, extent);
|
|
}
|
|
|
|
template std::pair<bool,box_type> process_geojson_file_x3(boxes_type&, std::string const&, bool, bool);
|
|
|
|
}}
|