139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2015 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_CSV_DATASOURCE_HPP
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#define MAPNIK_CSV_DATASOURCE_HPP
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// mapnik
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#include <mapnik/datasource.hpp>
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#include <mapnik/params.hpp>
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#include <mapnik/query.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/box2d.hpp>
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#include <mapnik/coord.hpp>
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#include <mapnik/feature_layer_desc.hpp>
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#include <mapnik/value_types.hpp>
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// boost
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#include <boost/optional.hpp>
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#include <boost/spirit/include/qi.hpp>
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#pragma GCC diagnostic ignored "-Wunused-variable"
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#pragma GCC diagnostic ignored "-Wunused-local-typedef"
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#pragma GCC diagnostic ignored "-Wshadow"
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#pragma GCC diagnostic ignored "-Wsign-conversion"
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#pragma GCC diagnostic ignored "-Wconversion"
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#include <boost/version.hpp>
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#include <boost/geometry/index/rtree.hpp>
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#pragma GCC diagnostic pop
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#include <mapnik/csv/csv_grammar.hpp>
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// stl
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#include <vector>
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#include <deque>
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#include <string>
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namespace mapnik {
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static const csv_line_grammar<char const*> line_g;
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static csv_line parse_line(std::string const& line_str, std::string const& separator)
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{
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csv_line values;
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auto start = line_str.c_str();
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auto end = start + line_str.length();
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boost::spirit::standard::blank_type blank;
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if (!boost::spirit::qi::phrase_parse(start, end, (line_g)(boost::phoenix::cref(separator)), blank, values))
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{
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throw std::runtime_error("Failed to parse CSV line:\n" + line_str);
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}
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return values;
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}
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}
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template <std::size_t Max, std::size_t Min>
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struct csv_linear : boost::geometry::index::linear<Max,Min> {};
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namespace boost { namespace geometry { namespace index { namespace detail { namespace rtree {
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template <std::size_t Max, std::size_t Min>
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struct options_type<csv_linear<Max,Min> >
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{
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using type = options<csv_linear<Max, Min>,
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insert_default_tag,
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choose_by_content_diff_tag,
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split_default_tag,
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linear_tag,
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#if BOOST_VERSION >= 105700
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node_variant_static_tag>;
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#else
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node_s_mem_static_tag>;
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#endif
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};
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}}}}}
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class csv_datasource : public mapnik::datasource
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{
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public:
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using box_type = mapnik::box2d<double>;
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using item_type = std::pair<box_type, std::pair<std::size_t, std::size_t>>;
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using spatial_index_type = boost::geometry::index::rtree<item_type,csv_linear<16,4>>;
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csv_datasource(mapnik::parameters const& params);
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virtual ~csv_datasource ();
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mapnik::datasource::datasource_t type() const;
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static const char * name();
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mapnik::featureset_ptr features(mapnik::query const& q) const;
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mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt, double tol = 0) const;
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mapnik::box2d<double> envelope() const;
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mapnik::layer_descriptor get_descriptor() const;
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boost::optional<mapnik::datasource_geometry_t> get_geometry_type() const;
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template <typename T>
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void parse_csv(T & stream,
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std::string const& escape,
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std::string const& separator,
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std::string const& quote);
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private:
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mapnik::layer_descriptor desc_;
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mapnik::box2d<double> extent_;
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std::string filename_;
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std::string inline_string_;
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mapnik::value_integer row_limit_;
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std::deque<mapnik::feature_ptr> features_;
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std::string escape_;
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std::string separator_;
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std::string quote_;
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std::vector<std::string> headers_;
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std::string manual_headers_;
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bool strict_;
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double filesize_max_;
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mapnik::context_ptr ctx_;
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bool extent_initialized_;
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std::unique_ptr<spatial_index_type> tree_;
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detail::geometry_column_locator locator_;
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};
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#endif // MAPNIK_CSV_DATASOURCE_HPP
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