118 lines
2.7 KiB
C++
118 lines
2.7 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef RASTER_FEATURESET_HH
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#define RASTER_FEATURESET_HH
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#include "raster_datasource.hpp"
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#include "raster_info.hpp"
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#include <vector>
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using std::vector;
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class single_file_policy
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{
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raster_info info_;
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public:
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class const_iterator
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{
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enum {start,end};
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bool status_;
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const single_file_policy* p_;
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public:
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explicit const_iterator(const single_file_policy* p)
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:status_(start),
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p_(p) {}
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const_iterator()
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:status_(end){}
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const_iterator(const const_iterator& other)
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:status_(other.status_),
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p_(other.p_) {}
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const_iterator& operator++()
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{
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status_=end;
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return *this;
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}
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const raster_info& operator*() const
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{
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return p_->info_;
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}
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const raster_info* operator->() const
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{
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return &(p_->info_);
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}
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bool operator!=(const const_iterator& itr)
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{
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return status_!=itr.status_;
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}
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};
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explicit single_file_policy(const raster_info& info)
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:info_(info) {}
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const_iterator begin()
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{
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return const_iterator(this);
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}
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const_iterator query(const Envelope<double>& box)
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{
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if (box.intersects(info_.envelope()))
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{
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return begin();
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}
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return end();
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}
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const_iterator end()
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{
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return const_iterator();
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}
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};
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class os_name_policy
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{
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//TODO
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};
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template <typename LookupPolicy>
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class raster_featureset : public Featureset
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{
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typedef typename LookupPolicy::const_iterator iterator_type;
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LookupPolicy policy_;
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size_t id_;
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Envelope<double> extent_;
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CoordTransform t_;
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iterator_type curIter_;
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iterator_type endIter_;
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public:
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raster_featureset(LookupPolicy const& policy,query const& q);
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virtual ~raster_featureset();
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feature_ptr next();
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};
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#endif //RASTER_FEATURESET_HH
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