56 lines
1.6 KiB
C++
56 lines
1.6 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) 2011 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 MAPNIK_ATTRIBUTE_HPP
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#define MAPNIK_ATTRIBUTE_HPP
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// mapnik
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#include <mapnik/value.hpp>
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// stl
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#include <string>
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namespace mapnik {
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static mapnik::value _null_value;
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struct attribute
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{
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std::string name_;
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explicit attribute(std::string const& name)
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: name_(name) {}
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template <typename V ,typename F>
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V value(F const& f) const
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{
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typedef typename F::const_iterator const_iterator;
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const_iterator itr = f.find(name_);
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if (itr != f.end())
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{
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return itr->second;
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}
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return _null_value;
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}
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std::string const& name() const { return name_;}
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};
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}
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#endif // MAPNIK_ATTRIBUTE_HPP
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