98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
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/*****************************************************************************
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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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// mapnik
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#include "csv_index_featureset.hpp"
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#include <mapnik/debug.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/feature_factory.hpp>
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#include <mapnik/util/utf_conv_win.hpp>
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#include <mapnik/util/trim.hpp>
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#include <mapnik/util/spatial_index.hpp>
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// stl
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#include <string>
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#include <vector>
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#include <deque>
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#include <fstream>
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using value_type = std::pair<std::size_t, std::size_t>;
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namespace std {
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template <typename InputStream>
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InputStream & operator>>(InputStream & in, value_type & value)
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{
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in.read(reinterpret_cast<char*>(&value), sizeof(value_type));
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return in;
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}
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}
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csv_index_featureset::csv_index_featureset(std::string const& filename_,
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mapnik::filter_in_box const& filter,
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detail::geometry_column_locator const& locator,
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std::string const& separator,
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std::vector<std::string> const& headers,
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mapnik::context_ptr const& ctx)
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: separator_(separator),
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headers_(headers),
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ctx_(ctx),
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locator_(locator),
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tr_("utf8")
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{
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std::string indexname = filename_ + ".index";
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std::ifstream in(indexname.c_str(), std::ios::binary);
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if (!in) throw mapnik::datasource_exception("CSV Plugin: can't open index file " + indexname);
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std::vector<value_type> positions;
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mapnik::util::spatial_index<value_type,
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mapnik::filter_in_box,
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std::ifstream>::query(filter, in, positions);
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std::sort(positions.begin(), positions.end(),
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[](value_type const& lhs, value_type const& rhs) { return lhs.first < rhs.first;});
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for (auto const& pos : positions)
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{
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std::cerr << "OFF=" << pos.first << " SIZE=" << pos.second << std::endl;
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}
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}
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csv_index_featureset::~csv_index_featureset() {}
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/*
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mapnik::feature_ptr csv_index_featureset::parse_feature(std::string const& str)
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{
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auto values = csv_utils::parse_line(str, separator_);
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auto geom = detail::extract_geometry(values, locator_);
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if (!geom.is<mapnik::geometry::geometry_empty>())
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{
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx_, ++feature_id_));
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feature->set_geometry(std::move(geom));
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detail::process_properties(*feature, headers_, values, locator_, tr_);
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return feature;
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}
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return mapnik::feature_ptr();
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}
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*/
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mapnik::feature_ptr csv_index_featureset::next()
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{
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return mapnik::feature_ptr();
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}
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