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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 <fstream>
// mapnik
#include <mapnik/debug.hpp>
#include <mapnik/feature_factory.hpp>
// boost
#include <boost/algorithm/string.hpp>
#include <boost/interprocess/streams/bufferstream.hpp>
#include <boost/make_shared.hpp>
#include "shape_index_featureset.hpp"
#include "shape_utils.hpp"
#include "shp_index.hpp"
using mapnik::feature_factory;
using mapnik::geometry_type;
template <typename filterT>
shape_index_featureset<filterT>::shape_index_featureset(filterT const& filter,
shape_io& shape,
std::set<std::string> const& attribute_names,
std::string const& encoding,
std::string const& shape_name,
int row_limit)
: filter_(filter),
ctx_(boost::make_shared<mapnik::context_type>()),
shape_(shape),
tr_(new mapnik::transcoder(encoding)),
row_limit_(row_limit),
count_(0),
feature_bbox_()
{
shape_.shp().skip(100);
setup_attributes(ctx_, attribute_names, shape_name, shape_,attr_ids_);
boost::shared_ptr<shape_file> index = shape_.index();
if (index)
{
#ifdef SHAPE_MEMORY_MAPPED_FILE
//shp_index<filterT,stream<mapped_file_source> >::query(filter, index->file(), offsets_);
shp_index<filterT,boost::interprocess::ibufferstream>::query(filter, index->file(), offsets_);
#else
shp_index<filterT,std::ifstream>::query(filter, index->file(), offsets_);
#endif
}
std::sort(offsets_.begin(), offsets_.end());
MAPNIK_LOG_DEBUG(shape) << "shape_index_featureset: Query size=" << offsets_.size();
itr_ = offsets_.begin();
}
template <typename filterT>
feature_ptr shape_index_featureset<filterT>::next()
{
if (row_limit_ && count_ >= row_limit_)
{
return feature_ptr();
}
while ( itr_ != offsets_.end())
{
shape_.move_to(*itr_++);
shape_file::record_type record(shape_.reclength_ * 2);
shape_.shp().read_record(record);
int type = record.read_ndr_integer();
feature_ptr feature(feature_factory::create(ctx_,shape_.id_));
switch (type)
{
case shape_io::shape_point:
case shape_io::shape_pointm:
case shape_io::shape_pointz:
{
double x = record.read_double();
double y = record.read_double();
std::auto_ptr<geometry_type> point(new geometry_type(mapnik::Point));
point->move_to(x, y);
feature->paths().push_back(point);
break;
}
case shape_io::shape_multipoint:
case shape_io::shape_multipointm:
case shape_io::shape_multipointz:
{
shape_io::read_bbox(record, feature_bbox_);
if (!filter_.pass(feature_bbox_)) continue;
int num_points = record.read_ndr_integer();
for (int i = 0; i < num_points; ++i)
{
double x = record.read_double();
double y = record.read_double();
std::auto_ptr<geometry_type> point(new geometry_type(mapnik::Point));
point->move_to(x, y);
feature->paths().push_back(point);
}
break;
}
case shape_io::shape_polyline:
case shape_io::shape_polylinem:
case shape_io::shape_polylinez:
{
shape_io::read_bbox(record, feature_bbox_);
if (!filter_.pass(feature_bbox_)) continue;
shape_io::read_polyline(record,feature->paths());
break;
}
case shape_io::shape_polygon:
case shape_io::shape_polygonm:
case shape_io::shape_polygonz:
{
shape_io::read_bbox(record, feature_bbox_);
if (!filter_.pass(feature_bbox_)) continue;
shape_io::read_polygon(record,feature->paths());
break;
}
default :
MAPNIK_LOG_DEBUG(shape) << "shape_index_featureset: Unsupported type" << type;
return feature_ptr();
}
// FIXME
feature->set_id(shape_.id_);
if (attr_ids_.size())
{
shape_.dbf().move_to(shape_.id_);
std::vector<int>::const_iterator itr = attr_ids_.begin();
std::vector<int>::const_iterator end = attr_ids_.end();
try
{
for (; itr!=end; ++itr)
{
shape_.dbf().add_attribute(*itr, *tr_, *feature);
}
}
catch (...)
{
MAPNIK_LOG_ERROR(shape) << "Shape Plugin: error processing attributes";
}
}
++count_;
return feature;
}
MAPNIK_LOG_DEBUG(shape) << "shape_index_featureset: " << count_ << " features";
return feature_ptr();
}
template <typename filterT>
shape_index_featureset<filterT>::~shape_index_featureset() {}
template class shape_index_featureset<mapnik::filter_in_box>;
template class shape_index_featureset<mapnik::filter_at_point>;
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