mapnik/bindings/python/mapnik_featureset.cpp

/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon
 *
 * 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
 *
 *****************************************************************************/
//$Id$

// boost
#include <boost/python.hpp>
// mapnik
#include <mapnik/feature.hpp>
#include <mapnik/datasource.hpp>

namespace {
    using namespace boost::python;
    inline object pass_through(object const& o) { return o; }
    
    inline mapnik::feature_ptr next(mapnik::featureset_ptr const& itr)
    {
        if (!itr)
        {
            PyErr_SetString(PyExc_StopIteration, "No more features.");
            boost::python::throw_error_already_set();
        }

        return itr->next();
    }    
}

void export_featureset()
{
    using namespace boost::python;
    using mapnik::Feature;
    using mapnik::Featureset;
    
    class_<Featureset,boost::shared_ptr<Featureset>,
        boost::noncopyable>("Featureset",no_init)
        .def("next",next)
        .def("__iter__",pass_through)
        ;
}