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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
*
*****************************************************************************/
#ifndef MAPNIK_FEATURE_HPP
#define MAPNIK_FEATURE_HPP
// mapnik
#include <mapnik/config.hpp>
#include <mapnik/value.hpp>
#include <mapnik/geometry.hpp>
#include <mapnik/raster.hpp>
#include <mapnik/feature_kv_iterator.hpp>
// boost
#include <boost/version.hpp>
#if BOOST_VERSION >= 104000
#include <boost/property_map/property_map.hpp>
#else
#include <boost/property_map.hpp>
#endif
#include <boost/utility.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/scoped_ptr.hpp>
// stl
#include <vector>
#include <map>
#include <stdexcept>
namespace mapnik {
typedef boost::shared_ptr<raster> raster_ptr;
class feature_impl;
template <typename T>
class context : private boost::noncopyable,
public boost::associative_property_map<T>
{
friend class feature_impl;
public:
typedef T map_type;
typedef typename boost::associative_property_map<map_type> base_type;
typedef typename map_type::value_type value_type;
typedef typename map_type::key_type key_type;
typedef typename map_type::size_type size_type;
typedef typename map_type::difference_type difference_type;
typedef typename map_type::iterator iterator;
typedef typename map_type::const_iterator const_iterator;
context()
: base_type(mapping_) {}
size_type push(key_type const& name)
{
size_type index = mapping_.size();
mapping_.insert(std::make_pair(name, index));
return index;
}
size_type size() const { return mapping_.size(); }
const_iterator begin() const { return mapping_.begin();}
const_iterator end() const { return mapping_.end();}
private:
map_type mapping_;
};
typedef MAPNIK_DECL context<std::map<std::string,std::size_t> > context_type;
typedef MAPNIK_DECL boost::shared_ptr<context_type> context_ptr;
class MAPNIK_DECL feature_impl : private boost::noncopyable
{
friend class feature_kv_iterator;
public:
typedef mapnik::value value_type;
typedef std::vector<value_type> cont_type;
typedef feature_kv_iterator iterator;
feature_impl(context_ptr const& ctx, int id)
: id_(id),
ctx_(ctx),
data_(ctx_->mapping_.size()),
geom_cont_(),
raster_()
{}
inline int id() const { return id_;}
inline void set_id(int id) { id_ = id;}
template <typename T>
void put(context_type::key_type const& key, T const& val)
{
put(key,value(val));
}
template <typename T>
void put_new(context_type::key_type const& key, T const& val)
{
put_new(key,value(val));
}
void put(context_type::key_type const& key, value const& val)
{
context_type::map_type::const_iterator itr = ctx_->mapping_.find(key);
if (itr != ctx_->mapping_.end()
&& itr->second < data_.size())
{
data_[itr->second] = val;
}
else
{
throw std::out_of_range(std::string("Key does not exist: '") + key + "'");
}
}
void put_new(context_type::key_type const& key, value const& val)
{
context_type::map_type::const_iterator itr = ctx_->mapping_.find(key);
if (itr != ctx_->mapping_.end()
&& itr->second < data_.size())
{
data_[itr->second] = val;
}
else
{
cont_type::size_type index = ctx_->push(key);
if (index == data_.size())
data_.push_back(val);
}
}
bool has_key(context_type::key_type const& key) const
{
return (ctx_->mapping_.find(key) != ctx_->mapping_.end());
}
value_type const& get(context_type::key_type const& key) const
{
context_type::map_type::const_iterator itr = ctx_->mapping_.find(key);
if (itr != ctx_->mapping_.end())
return get(itr->second);
else
throw std::out_of_range(std::string("Key does not exist: '") + key + "'");
}
value_type const& get(std::size_t index) const
{
if (index < data_.size())
return data_[index];
throw std::out_of_range("Index out of range");
}
boost::optional<value_type const&> get_optional(std::size_t index) const
{
if (index < data_.size())
return boost::optional<value_type const&>(data_[index]);
return boost::optional<value_type const&>();
}
std::size_t size() const
{
return data_.size();
}
cont_type const& get_data() const
{
return data_;
}
void set_data(cont_type const& data)
{
data_ = data;
}
context_ptr context()
{
return ctx_;
}
boost::ptr_vector<geometry_type> const& paths() const
{
return geom_cont_;
}
boost::ptr_vector<geometry_type> & paths()
{
return geom_cont_;
}
void add_geometry(geometry_type * geom)
{
geom_cont_.push_back(geom);
}
unsigned num_geometries() const
{
return geom_cont_.size();
}
geometry_type const& get_geometry(unsigned index) const
{
return geom_cont_[index];
}
geometry_type& get_geometry(unsigned index)
{
return geom_cont_[index];
}
box2d<double> envelope() const
{
// TODO - cache this
box2d<double> result;
for (unsigned i=0;i<num_geometries();++i)
{
geometry_type const& geom = get_geometry(i);
if (i==0)
{
box2d<double> const& box = geom.envelope();
result.init(box.minx(),box.miny(),box.maxx(),box.maxy());
}
else
{
result.expand_to_include(geom.envelope());
}
}
return result;
}
const raster_ptr& get_raster() const
{
return raster_;
}
void set_raster(raster_ptr const& raster)
{
raster_ = raster;
}
feature_kv_iterator begin() const
{
return feature_kv_iterator(*this,true);
}
feature_kv_iterator end() const
{
return feature_kv_iterator(*this);
}
std::string to_string() const
{
std::stringstream ss;
ss << "Feature ( id=" << id_ << std::endl;
context_type::map_type::const_iterator itr = ctx_->mapping_.begin();
context_type::map_type::const_iterator end = ctx_->mapping_.end();
for ( ;itr!=end; ++itr)
{
std::size_t index = itr->second;
if (index < data_.size())
{
ss << " " << itr->first << ":" << data_[itr->second] << std::endl;
}
}
ss << ")" << std::endl;
return ss.str();
}
private:
int id_;
context_ptr ctx_;
cont_type data_;
boost::ptr_vector<geometry_type> geom_cont_;
raster_ptr raster_;
};
inline std::ostream& operator<< (std::ostream & out,feature_impl const& f)
{
out << f.to_string();
return out;
}
typedef feature_impl Feature;
}
#endif // MAPNIK_FEATURE_HPP
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