mapnik/plugins/input/raster/raster_featureset.hpp
Artem Pavlenko 992af4747d 1. move include to mapnik/include
2. update demos,bibdibgs etc.
2006-10-04 11:22:18 +00:00

113 lines
2.8 KiB
C++

/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2006 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 RASTER_FEATURESET_HH
#define RASTER_FEATURESET_HH
#include <vector>
#include "raster_datasource.hpp"
#include "raster_info.hpp"
using std::vector;
class single_file_policy
{
raster_info info_;
public:
class const_iterator
{
enum {start,end};
bool status_;
const single_file_policy* p_;
public:
explicit const_iterator(const single_file_policy* p)
:status_(start),
p_(p) {}
const_iterator()
:status_(end){}
const_iterator(const const_iterator& other)
:status_(other.status_),
p_(other.p_) {}
const_iterator& operator++()
{
status_=end;
return *this;
}
const raster_info& operator*() const
{
return p_->info_;
}
const raster_info* operator->() const
{
return &(p_->info_);
}
bool operator!=(const const_iterator& itr)
{
return status_!=itr.status_;
}
};
explicit single_file_policy(const raster_info& info)
:info_(info) {}
const_iterator begin()
{
return const_iterator(this);
}
const_iterator query(const Envelope<double>& box)
{
if (box.intersects(info_.envelope()))
{
return begin();
}
return end();
}
const_iterator end()
{
return const_iterator();
}
};
template <typename LookupPolicy>
class raster_featureset : public Featureset
{
typedef typename LookupPolicy::const_iterator iterator_type;
LookupPolicy policy_;
size_t id_;
Envelope<double> extent_;
iterator_type curIter_;
iterator_type endIter_;
public:
raster_featureset(LookupPolicy const& policy,query const& q);
virtual ~raster_featureset();
feature_ptr next();
};
#endif //RASTER_FEATURESET_HH