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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 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>
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#include <boost/algorithm/string.hpp>
#if defined(MAPNIK_MEMORY_MAPPED_FILE)
#include <boost/interprocess/streams/bufferstream.hpp>
#endif
#pragma GCC diagnostic pop
#include "shape_index_featureset.hpp"
#include "shape_utils.hpp"
#include <mapnik/util/spatial_index.hpp>
using mapnik::feature_factory;
template <typename filterT>
shape_index_featureset<filterT>::shape_index_featureset(filterT const& filter,
std::unique_ptr<shape_io> && shape_ptr,
std::set<std::string> const& attribute_names,
std::string const& encoding,
std::string const& shape_name,
int row_limit)
: filter_(filter),
ctx_(std::make_shared<mapnik::context_type>()),
shape_ptr_(std::move(shape_ptr)),
tr_(new mapnik::transcoder(encoding)),
offsets_(),
itr_(),
attr_ids_(),
row_limit_(row_limit),
count_(0),
feature_bbox_()
{
shape_ptr_->shp().skip(100);
setup_attributes(ctx_, attribute_names, shape_name, *shape_ptr_,attr_ids_);
auto index = shape_ptr_->index();
if (index)
{
#if defined(MAPNIK_MEMORY_MAPPED_FILE)
mapnik::util::spatial_index<mapnik::detail::node, filterT,boost::interprocess::ibufferstream>::query(filter, index->file(), offsets_);
#else
mapnik::util::spatial_index<mapnik::detail::node, filterT, std::ifstream>::query(filter, index->file(), offsets_);
#endif
}
std::sort(offsets_.begin(), offsets_.end(), [](mapnik::detail::node const& n0, mapnik::detail::node const& n1)
{return n0.offset != n1.offset ? n0.offset < n1.offset : n0.start < n1.start;});
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())
{
int offset = itr_->offset;
shape_ptr_->move_to(offset);
std::vector<std::pair<int,int>> parts;
while (itr_ != offsets_.end() && itr_->offset == offset)
{
if (itr_->start!= -1) parts.emplace_back(itr_->start, itr_->end);
++itr_;
}
mapnik::value_integer feature_id = shape_ptr_->id();
shape_file::record_type record(shape_ptr_->reclength_ * 2);
shape_ptr_->shp().read_record(record);
int type = record.read_ndr_integer();
feature_ptr feature(feature_factory::create(ctx_, feature_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();
feature->set_geometry(mapnik::geometry::point<double>(x,y));
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();
mapnik::geometry::multi_point<double> multi_point;
for (int i = 0; i < num_points; ++i)
{
double x = record.read_double();
double y = record.read_double();
multi_point.emplace_back(mapnik::geometry::point<double>(x, y));
}
feature->set_geometry(std::move(multi_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;
if (parts.size() < 2) feature->set_geometry(shape_io::read_polyline(record));
else feature->set_geometry(shape_io::read_polyline_parts(record, parts));
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;
if (parts.size() < 2) feature->set_geometry(shape_io::read_polygon(record));
else feature->set_geometry(shape_io::read_polygon_parts(record, parts));
break;
}
default :
MAPNIK_LOG_DEBUG(shape) << "shape_index_featureset: Unsupported type" << type;
return feature_ptr();
}
if (attr_ids_.size())
{
shape_ptr_->dbf().move_to(shape_ptr_->id_);
try
{
for (auto id : attr_ids_)
{
shape_ptr_->dbf().add_attribute(id, *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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