/usr/include/mapnik/datasource.hpp is in libmapnik-dev 2.2.0+ds1-6build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 MAPNIK_DATASOURCE_HPP
#define MAPNIK_DATASOURCE_HPP
// mapnik
#include <mapnik/config.hpp>
#include <mapnik/params.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/query.hpp>
#include <mapnik/feature_layer_desc.hpp>
#include <mapnik/noncopyable.hpp>
// boost
#include <boost/shared_ptr.hpp>
#include <boost/optional.hpp>
// stl
#include <map>
#include <string>
namespace mapnik {
struct MAPNIK_DECL Featureset : private mapnik::noncopyable
{
virtual feature_ptr next() = 0;
virtual ~Featureset() {}
};
typedef boost::shared_ptr<Featureset> featureset_ptr;
class MAPNIK_DECL datasource_exception : public std::exception
{
public:
datasource_exception(std::string const& message)
: message_(message)
{
}
~datasource_exception() throw()
{
}
virtual const char* what() const throw()
{
return message_.c_str();
}
private:
std::string message_;
};
class MAPNIK_DECL datasource : private mapnik::noncopyable
{
public:
enum datasource_t {
Vector,
Raster
};
enum geometry_t {
Point = 1,
LineString = 2,
Polygon = 3,
Collection = 4
};
datasource (parameters const& params)
: params_(params) {}
/*!
* @brief Get the configuration parameters of the data source.
*
* These vary depending on the type of data source.
*
* @return The configuration parameters of the data source.
*/
parameters const& params() const
{
return params_;
}
parameters & params()
{
return params_;
}
/*!
* @brief Get the type of the datasource
* @return The type of the datasource (Vector or Raster)
*/
virtual datasource_t type() const = 0;
virtual featureset_ptr features(query const& q) const = 0;
virtual featureset_ptr features_at_point(coord2d const& pt, double tol = 0) const = 0;
virtual box2d<double> envelope() const = 0;
virtual boost::optional<geometry_t> get_geometry_type() const = 0;
virtual layer_descriptor get_descriptor() const = 0;
virtual ~datasource() {}
protected:
parameters params_;
};
typedef const char * datasource_name();
typedef datasource* create_ds(parameters const& params);
typedef void destroy_ds(datasource *ds);
class datasource_deleter
{
public:
void operator() (datasource* ds)
{
delete ds;
}
};
typedef boost::shared_ptr<datasource> datasource_ptr;
#ifdef MAPNIK_STATIC_PLUGINS
#define DATASOURCE_PLUGIN(classname)
#else
#define DATASOURCE_PLUGIN(classname) \
extern "C" MAPNIK_EXP const char * datasource_name() \
{ \
return classname::name(); \
} \
extern "C" MAPNIK_EXP datasource* create(parameters const& params) \
{ \
return new classname(params); \
} \
extern "C" MAPNIK_EXP void destroy(datasource *ds) \
{ \
delete ds; \
}
#endif
}
#endif // MAPNIK_DATASOURCE_HPP
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