Object.h

Go to the documentation of this file.

/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
 *   Licensees holding valid commercial licenses may use this file in
 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
 *   Alternatively, this file may be used under the terms of the GNU
 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
 *   ensure the GNU General Public License version 3.0 requirements will be
 *   met: http://www.gnu.org/copyleft/gpl.html.
 *   Alternatively you may (at your option) use any later version of the GNU
 *   General Public License if such license has been publicly approved by
 *   MLAB and NICR (or its successors, if any).
 *
 * IN NO EVENT SHALL "MLAB" OR "NICR" BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
 * THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF "MLAB" OR
 * "NICR" HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * "MLAB" AND "NICR" SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND "MLAB" AND "NICR" HAVE NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS OR MODIFICATIONS.
 */

#ifndef _MIRA_OBJECT_H_
#define _MIRA_OBJECT_H_

#include <string>

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR1__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR1__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR2__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR2__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR3__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR3__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};

// class which will be abused as compile time error message
template< class T >
class ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR4__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________
{
    virtual int FOR_CLASS();
    virtual ~________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR4__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________() {}
};


namespace mira {


class Class;
class Object;

// *****************************************************************************
// *** PseudoClass
// *****************************************************************************

class PseudoClass
{
public:
    std::string const& getIdentifier() const
    {
        static std::string tIdent("mira::Object");
        return tIdent;
    }

    Object* newInstance( std::string const& childIdentifier ) const;

    template <class CLASS>
    CLASS* newInstance( std::string const& childIdentifier ) const;

};

// *****************************************************************************
// *** Object
// *****************************************************************************

class Object
{
    friend class ClassFactory;

    template<typename Class, typename Base>
    friend struct FactoryRegisterClassHelper;

public:
    Object() = default;
    Object(const Object&) = default;
    Object(Object&&) = default;
    Object& operator=(const Object&) = default;
    Object& operator=(Object&&) = default;
    virtual ~Object() = default;

    Class const& getClass() const {
        return internalGetClass();
    }

    static PseudoClass const& CLASS() {
        static mira::PseudoClass sClass;
        return sClass;
    }

protected:
    virtual Class const& internalGetClass() const = 0;

};

// *****************************************************************************
// *** MACROS
// *****************************************************************************

// the macros should be used to enable the class factory to use the special
// constructors

#define MIRA_OBJECT_CONSTRUCTOR1(T, A0) \
template <> int \
    ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR1__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________ \
    <T>::FOR_CLASS() { return 0; } \
namespace mira { \
    template<> \
    T* mira::ClassFactoryDefaultConstClassBuilder::invoke<1,T>( std::va_list ap) { \
        A0 a0 = va_arg(ap, A0); \
        return new T(a0); \
    } \
}

#define MIRA_OBJECT_CONSTRUCTOR2(T, A0, A1) \
template <> int \
    ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR2__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________ \
    <T>::FOR_CLASS() { return 0; } \
namespace mira { \
    template<> \
    T* mira::ClassFactoryDefaultConstClassBuilder::invoke<2,T>( std::va_list ap) { \
        A0 a0 = va_arg(ap, A0); \
        A1 a1 = va_arg(ap, A1); \
        return new T( a0, a1 ); \
    } \
}

#define MIRA_OBJECT_CONSTRUCTOR3(T, A0, A1, A2) \
template <> int \
    ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR3__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________ \
    <T>::FOR_CLASS() { return 0; } \
namespace mira { \
    template<> \
    T* mira::ClassFactoryDefaultConstClassBuilder::invoke<3,T>( std::va_list ap) { \
        A0 a0 = va_arg(ap, A0); \
        A1 a1 = va_arg(ap, A1); \
        A2 a2 = va_arg(ap, A2); \
        return new T( a0, a1, a2 ); \
    } \
}

#define MIRA_OBJECT_CONSTRUCTOR4(T, A0, A1, A2, A3) \
template <> int \
    ________________________________PLEASE_USE_THE__MIRA_OBJECT_CONSTRUCTOR4__MACRO_IN_GLOBAL_NAMESPACE_ONLY________________________________ \
    <T>::FOR_CLASS() { return 0; } \
namespace mira { \
    template<> \
    T* mira::ClassFactoryDefaultConstClassBuilder::invoke<4,T>( std::va_list ap) { \
        A0 a0 = va_arg(ap, A0); \
        A1 a1 = va_arg(ap, A1); \
        A2 a2 = va_arg(ap, A2); \
        A3 a3 = va_arg(ap, A3); \
        return new T( a0, a1, a2, a3 ); \
    } \
}


} // namespace

#endif /* _MIRA_OBJECT_H_ */