interface_merger.h

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/***************************************************************************************************
 * Copyright 2022 NVIDIA Corporation. All rights reserved.
 **************************************************************************************************/

#ifndef MI_BASE_INTERFACE_MERGER_H
#define MI_BASE_INTERFACE_MERGER_H

#include <mi/base/iinterface.h>

namespace mi {
namespace base {

template <typename MAJOR, typename MINOR>
class Interface_merger
  : public MAJOR,
    public MINOR
{
public:
    typedef MAJOR MAJOR_BASE;
    
    typedef MINOR MINOR_BASE;

    static bool compare_iid( const Uuid& iid) {
        if( MAJOR::compare_iid( iid))
            return true;
        return MINOR::compare_iid( iid);
    }

    const IInterface* get_interface( const Uuid& interface_id) const;

    template <class T>
    const T* get_interface() const {
        return static_cast<const T*>( get_interface( typename T::IID()));
    }

    IInterface* get_interface( const Uuid& interface_id);

    template <class T>
    T* get_interface() {
        return static_cast<T*>( get_interface( typename T::IID()));
    }

    Uuid get_iid() const {
        return MAJOR::get_iid();
    }

    mi::Uint32 retain() const {
        return MAJOR::retain();
    }

    mi::Uint32 release() const {
        return MAJOR::release();
    }

    const MAJOR* cast_to_major() const {
        return static_cast<const MAJOR*>( this);
    }

    MAJOR* cast_to_major() {
        return static_cast<MAJOR*>( this);
    }
};

template <typename MAJOR, typename MINOR>
const IInterface* Interface_merger<MAJOR,MINOR>::get_interface(
    const Uuid& interface_id) const
{
    const IInterface* iinterface = MAJOR::get_interface( interface_id);
    if( iinterface)
        return iinterface;
    return MINOR::get_interface_static( static_cast<const MINOR*>( this), interface_id);
}

template <typename MAJOR, typename MINOR>
IInterface* Interface_merger<MAJOR,MINOR>::get_interface(
    const Uuid& interface_id)
{
    IInterface* iinterface = MAJOR::get_interface( interface_id);
    if( iinterface)
        return iinterface;
    return MINOR::get_interface_static( static_cast<MINOR*>( this), interface_id);
}
 // end group mi_base_iinterface

} // namespace base
} // namespace mi

#endif // MI_BASE_INTERFACE_MERGER_H