mapnik/plugins/input/ogr/ogr_featureset.hpp

/*****************************************************************************
 *
 * 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 OGR_FEATURESET_HPP
#define OGR_FEATURESET_HPP

// mapnik
#include <mapnik/datasource.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/geom_util.hpp>

// boost
#include <boost/scoped_ptr.hpp>

// ogr
#include <ogrsf_frmts.h>

class ogr_featureset : public mapnik::Featureset
{
public:
    ogr_featureset(mapnik::context_ptr const& ctx,
                   OGRDataSource & dataset,
                   OGRLayer & layer,
                   OGRGeometry & extent,
                   std::string const& encoding);

    ogr_featureset(mapnik::context_ptr const& ctx,
                   OGRDataSource & dataset,
                   OGRLayer & layer,
                   mapnik::box2d<double> const& extent,
                   std::string const& encoding);

    virtual ~ogr_featureset();
    mapnik::feature_ptr next();

private:
    mapnik::context_ptr ctx_;
    OGRDataSource& dataset_;
    OGRLayer& layer_;
    OGRFeatureDefn* layerdef_;
    boost::scoped_ptr<mapnik::transcoder> tr_;
    const char* fidcolumn_;
    mutable int count_;
    
};

#endif // OGR_FEATURESET_HPP