include/utilite/UVariant.h

/*
*  utilite is a cross-platform library with
*  useful utilities for fast and small developing.
*  Copyright (C) 2010  Mathieu Labbe
*
*  utilite is free library: 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 3 of the License, or
*  (at your option) any later version.
*
*  utilite 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 program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef UVARIANT_H
#define UVARIANT_H

#include <string>

class UVariant
{
public:
        virtual ~UVariant() {}

        virtual std::string className() const = 0;

        template<class T>
        const T * data() const {
                if(data_)
                        return (T*)data_;
                return (const T*)constData_;
        }

        template<class T>
        T * takeDataOwnership() {
                T * data = (T*)data_;
                constData_ = 0;
                data_=0;
                return data;
        }

protected:
        UVariant(void * data) :
                data_(data),
                constData_(0)
        {}

        UVariant(const void * data) :
                data_(0),
                constData_(data)
        {}

protected:
        void * data_;
        const void * constData_;
};

#endif /* UVARIANT_H */