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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 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
*
*****************************************************************************/
#ifndef POSTGIS_DATASOURCE_HPP
#define POSTGIS_DATASOURCE_HPP
// mapnik
#include <mapnik/datasource.hpp>
#include <mapnik/params.hpp>
#include <mapnik/query.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/box2d.hpp>
#include <mapnik/coord.hpp>
#include <mapnik/feature_layer_desc.hpp>
// boost
#include <boost/optional.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/scoped_ptr.hpp>
// stl
#include <vector>
#include <string>
#include "connection_manager.hpp"
#include "resultset.hpp"
#include "cursorresultset.hpp"
using mapnik::transcoder;
using mapnik::datasource;
using mapnik::box2d;
using mapnik::layer_descriptor;
using mapnik::featureset_ptr;
using mapnik::feature_ptr;
using mapnik::query;
using mapnik::parameters;
using mapnik::coord2d;
class postgis_datasource : public datasource
{
public:
postgis_datasource(const parameters &params, bool bind=true);
~postgis_datasource();
mapnik::datasource::datasource_t type() const;
static const char * name();
featureset_ptr features(const query& q) const;
featureset_ptr features_at_point(coord2d const& pt, double tol = 0) const;
mapnik::box2d<double> envelope() const;
boost::optional<mapnik::datasource::geometry_t> get_geometry_type() const;
layer_descriptor get_descriptor() const;
void bind() const;
private:
std::string sql_bbox(box2d<double> const& env) const;
std::string populate_tokens(std::string const& sql, double scale_denom, box2d<double> const& env, double pixel_width, double pixel_height) const;
std::string populate_tokens(std::string const& sql) const;
static std::string unquote(std::string const& sql);
boost::shared_ptr<IResultSet> get_resultset(boost::shared_ptr<Connection> const &conn, std::string const& sql) const;
static const std::string GEOMETRY_COLUMNS;
static const std::string SPATIAL_REF_SYS;
static const double FMAX;
const std::string uri_;
const std::string username_;
const std::string password_;
const std::string table_;
mutable std::string schema_;
mutable std::string geometry_table_;
const std::string geometry_field_;
mutable std::string key_field_;
const int cursor_fetch_size_;
const int row_limit_;
mutable std::string geometryColumn_;
mapnik::datasource::datasource_t type_;
mutable int srid_;
mutable bool extent_initialized_;
mutable mapnik::box2d<double> extent_;
mutable bool simplify_geometries_;
mutable layer_descriptor desc_;
ConnectionCreator<Connection> creator_;
const std::string bbox_token_;
const std::string scale_denom_token_;
const std::string pixel_width_token_;
const std::string pixel_height_token_;
bool persist_connection_;
bool extent_from_subquery_;
// params below are for testing purposes only (will likely be removed at any time)
int intersect_min_scale_;
int intersect_max_scale_;
};
#endif // POSTGIS_DATASOURCE_HPP
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