get_object.hpp

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//
// (c) Copyright 2013 DESY, Eugen Wintersberger <eugen.wintersberger@desy.de>
//
// This file is part of libpniio.
//
// libpniio is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// libpniio 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with libpniio.  If not, see <http://www.gnu.org/licenses/>.
// ===========================================================================
// Created on: Jul 2, 2013
//     Author: Eugen Wintersberger <eugen.wintersberger@desy.de>
//
#pragma once

#include <pni/core/types.hpp>

#include "../nxpath/nxpath.hpp"
#include "get_parent.hpp"
#include "get_root.hpp"
#include "get_attribute.hpp"
#include "get_child.hpp"
#include "utils.hpp"

namespace pni{
namespace io{
namespace nx{

    template<
             typename OTYPE,
             typename PATHT
            > 
    auto get_object(const OTYPE &o,const PATHT &path)
    ->decltype(get_parent(o))
    {
        typedef decltype(get_parent(o)) object_type;
        object_type target = o;
        nxpath p = get_path(path);

        //traverse over the path
        for(auto element: p)
        {
            if(element.first =="/")
                target = get_root(target);
            else if (element.first == ".")
                continue;
            else if (element.first == "..")
                target = get_parent(target);
            else
                target = get_child(target,element.first,element.second);
        }

        //if an attribute was requested 
        if(!p.attribute().empty())
            target = get_attribute(target,p.attribute());
        
        return target;
    }


//end of namespace
}
}
}