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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
*
*****************************************************************************/
// mapnik
#include <mapnik/debug.hpp>
#include <mapnik/datasource.hpp>
#include <mapnik/util/fs.hpp>
// std
#include <sstream>
#include "dataset_deliverer.h"
#include "basiccurl.h"
osm_dataset * dataset_deliverer::dataset = NULL;
std::string dataset_deliverer::last_bbox = "";
std::string dataset_deliverer::last_filename = "";
osm_dataset* dataset_deliverer::load_from_file(const string& file, const string& parser)
{
// Only actually load from file if we haven't done so already
if (dataset == NULL)
{
if (!mapnik::util::exists(file))
{
throw mapnik::datasource_exception("OSM Plugin: '" + file + "' does not exist");
}
dataset = new osm_dataset;
if (dataset->load(file.c_str(), parser) == false)
{
return NULL;
}
atexit(dataset_deliverer::release);
last_filename = file;
}
else if(file != last_filename)
{
dataset = new osm_dataset;
if (dataset->load(file.c_str(), parser) == false)
{
return NULL;
}
last_filename = file;
}
return dataset;
}
osm_dataset* dataset_deliverer::load_from_url(const string& url, const string& bbox, const string& parser)
{
if (dataset == NULL)
{
dataset = new osm_dataset;
if (dataset->load_from_url(url.c_str(), bbox, parser) == false)
{
return NULL;
}
atexit(dataset_deliverer::release);
last_bbox = bbox;
}
else if (bbox != last_bbox)
{
MAPNIK_LOG_WARN(osm) << "osm_dataset_deliverer: BBoxes are different=" << last_bbox << "," << bbox;
// Reload the dataset
dataset->clear();
if (dataset->load_from_url(url.c_str(), bbox, parser) == false)
{
return NULL;
}
last_bbox = bbox;
}
return dataset;
}
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