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Broker.hpp

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/*******************************************************************************
 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
 * Kopernikusstr. 16, D-52074 Aachen, Germany
 * phone: ++49-241-80-27910,
 * fax: ++49-241-80-22242
 * email: info@openwns.org
 * www: http://www.openwns.org
 * _____________________________________________________________________________
 *
 * openWNS is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 2 as published by the
 * Free Software Foundation;
 *
 * openWNS 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
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 ******************************************************************************/

#ifndef WNS_BROKER_HPP
#define WNS_BROKER_HPP

#include <WNS/container/Registry.hpp>
#include <WNS/pyconfig/View.hpp>

namespace wns {

    template <typename ELEMENT>
    class Broker
    {
        typedef container::Registry<pyconfig::View, ELEMENT*, container::registry::DeleteOnErase> Registry;

    public:

        ~Broker()
        {
            r.clear();
        }

        ELEMENT*
        procure(const pyconfig::View& pyco)
        {
            if(r.knows(pyco))
            {
                return r.find(pyco);
            }
            else
            {
                ELEMENT* element = new ELEMENT(pyco);
                r.insert(pyco, element);
                return element;
            }
        }

    private:
        Registry r;
    };

} // wns

#endif // NOT defined WNS_BROKER_HPP

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