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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
*
*****************************************************************************/
// stl
#include <stdexcept>
#include <set>
// mapnik
#include <mapnik/debug.hpp>
#include <mapnik/geom_util.hpp>
#include <mapnik/query.hpp>
#include <mapnik/boolean.hpp>
// boost
#include <boost/make_shared.hpp>
#include "osm_datasource.hpp"
#include "osm_featureset.hpp"
#include "dataset_deliverer.h"
#include "osmtagtypes.h"
#include "osmparser.h"
using mapnik::String;
using mapnik::Double;
using mapnik::Integer;
using mapnik::datasource_exception;
using mapnik::filter_in_box;
using mapnik::filter_at_point;
using mapnik::attribute_descriptor;
DATASOURCE_PLUGIN(osm_datasource)
osm_datasource::osm_datasource(const parameters& params)
: datasource (params),
extent_(),
type_(datasource::Vector),
desc_(*params.get<std::string>("type"), *params.get<std::string>("encoding", "utf-8"))
{
osm_data_ = NULL;
std::string osm_filename = *params.get<std::string>("file", "");
std::string parser = *params.get<std::string>("parser", "libxml2");
std::string url = *params.get<std::string>("url", "");
std::string bbox = *params.get<std::string>("bbox", "");
// load the data
if (url != "" && bbox != "")
{
// if we supplied a url and a bounding box, load from the url
MAPNIK_LOG_DEBUG(osm) << "osm_datasource: loading_from_url url=" << url << ",bbox=" << bbox;
if ((osm_data_ = dataset_deliverer::load_from_url(url, bbox, parser)) == NULL)
{
throw datasource_exception("Error loading from URL");
}
}
else if (osm_filename != "")
{
// if we supplied a filename, load from file
if ((osm_data_ = dataset_deliverer::load_from_file(osm_filename, parser)) == NULL)
{
std::string s("OSM Plugin: Error loading from file '");
s += osm_filename + "'";
throw datasource_exception(s);
}
}
else
{
throw datasource_exception("OSM Plugin: Neither 'file' nor 'url' and 'bbox' specified");
}
osm_tag_types tagtypes;
tagtypes.add_type("maxspeed", mapnik::Integer);
tagtypes.add_type("z_order", mapnik::Integer);
osm_data_->rewind();
// Need code to get the attributes of all the data
std::set<std::string> keys = osm_data_->get_keys();
// Add the attributes to the datasource descriptor - assume they are
// all of type String
for (std::set<std::string>::iterator i = keys.begin(); i != keys.end(); i++)
{
desc_.add_descriptor(attribute_descriptor(*i, tagtypes.get_type(*i)));
}
// Get the bounds of the data and set extent_ accordingly
bounds b = osm_data_->get_bounds();
extent_ = box2d<double>(b.w, b.s, b.e, b.n);
}
osm_datasource::~osm_datasource()
{
// Do not do as is now static variable and cleaned up at exit
//delete osm_data_;
}
const char * osm_datasource::name()
{
return "osm";
}
mapnik::datasource::datasource_t osm_datasource::type() const
{
return type_;
}
layer_descriptor osm_datasource::get_descriptor() const
{
return desc_;
}
featureset_ptr osm_datasource::features(const query& q) const
{
filter_in_box filter(q.get_bbox());
// so we need to filter osm features by bbox here...
return boost::make_shared<osm_featureset<filter_in_box> >(filter,
osm_data_,
q.property_names(),
desc_.get_encoding());
}
featureset_ptr osm_datasource::features_at_point(coord2d const& pt, double tol) const
{
filter_at_point filter(pt);
// collect all attribute names
std::vector<attribute_descriptor> const& desc_vector = desc_.get_descriptors();
std::vector<attribute_descriptor>::const_iterator itr = desc_vector.begin();
std::vector<attribute_descriptor>::const_iterator end = desc_vector.end();
std::set<std::string> names;
while (itr != end)
{
names.insert(itr->get_name());
++itr;
}
return boost::make_shared<osm_featureset<filter_at_point> >(filter,
osm_data_,
names,
desc_.get_encoding());
}
box2d<double> osm_datasource::envelope() const
{
return extent_;
}
boost::optional<mapnik::datasource::geometry_t> osm_datasource::get_geometry_type() const
{
return boost::optional<mapnik::datasource::geometry_t>(mapnik::datasource::Collection);
}
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