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/home/tetron/hack/vos/libs/vos/vos/meta_cast.hh

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#ifndef _META_CAST_HH_
#define _META_CAST_HH_

#include <vos/vos/vobjectbase.hh>
#include <vos/vos/metaobject.hh>

namespace VOS
{
    /** @ingroup libvos
        @copydoc VOS::meta_cast(VUtil::vRef<T> v)
    */
    template<class C> inline VUtil::vRef<C> meta_cast(Vobject* v)
    {
        if(C* ret = dynamic_cast<C*>(v)) return VUtil::vRef<C>(ret, true);
        return v->getVobjectBase()->template queryInterface<C>();
    }

    /** @ingroup libvos
        @copydoc VOS::meta_cast(VUtil::vRef<T> v)
    */
    template<class C> inline VUtil::vRef<C> meta_cast(Vobject& v)
    {
        return meta_cast<C>(&v);
    }

    /** @ingroup libvos
        A special cast which allows you to retrieve some interface (if
        available) on the supplied Vobject.

        @code
        vRef<Vobject> vobj = site.createVobject2<Property, World>();
        vRef<Property> property = meta_cast<Property>(vobj);
        vRef<World> w = meta_cast<World>(property);
        @endcode

        @param v the object to be cast
        @return a vRef pointing to the new interface, or a null vRef
        if the vObject does not support this interface.
    */
    template<class C, class T> inline VUtil::vRef<C> meta_cast(VUtil::vRef<T> v)
    {
        return meta_cast<C>(v.get());
    }
}

#endif