119 lines
4 KiB
C++
119 lines
4 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2006 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
//$Id: datasource.hpp 43 2005-04-22 18:52:47Z pavlenko $
|
|
|
|
#ifndef DATASOURCE_HPP
|
|
#define DATASOURCE_HPP
|
|
|
|
#include <map>
|
|
#include <string>
|
|
#include "ctrans.hpp"
|
|
#include "params.hpp"
|
|
#include "feature.hpp"
|
|
#include "query.hpp"
|
|
#include "feature_layer_desc.hpp"
|
|
|
|
#include <boost/shared_ptr.hpp>
|
|
|
|
namespace mapnik
|
|
{
|
|
typedef MAPNIK_DECL shared_ptr<Feature> feature_ptr;
|
|
struct MAPNIK_DECL Featureset
|
|
{
|
|
virtual feature_ptr next()=0;
|
|
virtual ~Featureset() {};
|
|
};
|
|
|
|
typedef shared_ptr<Featureset> featureset_ptr;
|
|
class MAPNIK_DECL datasource_exception : public std::exception
|
|
{
|
|
private:
|
|
const std::string message_;
|
|
public:
|
|
datasource_exception(const std::string& message=std::string())
|
|
:message_(message) {}
|
|
|
|
~datasource_exception() throw() {}
|
|
virtual const char* what() const throw()
|
|
{
|
|
return message_.c_str();
|
|
}
|
|
};
|
|
|
|
class MAPNIK_DECL datasource : private boost::noncopyable
|
|
{
|
|
parameters params_;
|
|
public:
|
|
enum {
|
|
Vector,
|
|
Raster
|
|
};
|
|
|
|
datasource (parameters const& params)
|
|
: params_(params) {}
|
|
|
|
parameters const& params() const
|
|
{
|
|
return params_;
|
|
}
|
|
|
|
virtual int type() const=0;
|
|
virtual featureset_ptr features(const query& q) const=0;
|
|
virtual Envelope<double> const& envelope() const=0;
|
|
virtual layer_descriptor const& get_descriptor() const=0;
|
|
virtual ~datasource() {};
|
|
};
|
|
|
|
typedef std::string datasource_name();
|
|
typedef datasource* create_ds(const parameters& params);
|
|
typedef void destroy_ds(datasource *ds);
|
|
|
|
|
|
class datasource_deleter
|
|
{
|
|
public:
|
|
void operator() (datasource* ds)
|
|
{
|
|
delete ds;
|
|
}
|
|
};
|
|
|
|
typedef boost::shared_ptr<datasource> datasource_p;
|
|
|
|
///////////////////////////////////////////
|
|
#define DATASOURCE_PLUGIN(classname) \
|
|
extern "C" MAPNIK_DECL std::string datasource_name() \
|
|
{ \
|
|
return classname::name(); \
|
|
} \
|
|
extern "C" MAPNIK_DECL datasource* create(const parameters ¶ms) \
|
|
{ \
|
|
return new classname(params); \
|
|
} \
|
|
extern "C" MAPNIK_DECL void destroy(datasource *ds) \
|
|
{ \
|
|
delete ds; \
|
|
} \
|
|
///////////////////////////////////////////
|
|
}
|
|
#endif //DATASOURCE_HPP
|