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/*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ewk_object_private_h
#define ewk_object_private_h
#include <wtf/RefCounted.h>
class EwkObject : public RefCounted<EwkObject> {
public:
virtual ~EwkObject() { }
virtual const char* instanceClassName() const = 0;
};
template <class T>
inline bool ewk_object_is_of_type(const EwkObject* object)
{
return (reinterpret_cast<T>(0)->className() == object->instanceClassName());
}
template <class T>
inline bool ewk_object_cast_check(const EwkObject* object)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(object, false);
if (!ewk_object_is_of_type<T>(object)) {
EINA_LOG_CRIT("attempt to convert object of type %s to type %s",
object->instanceClassName(), reinterpret_cast<T>(0)->className());
ASSERT_NOT_REACHED();
return false;
}
return true;
}
template <class T>
inline const T ewk_object_cast(const EwkObject* object)
{
return ewk_object_cast_check<T>(object) ? static_cast<T>(object) : 0;
}
template <class T>
inline T ewk_object_cast(EwkObject* object)
{
return ewk_object_cast_check<T>(object) ? static_cast<T>(object) : 0;
}
#define EWK_OBJ_GET_IMPL_OR_RETURN(ImplClass, object, impl, ...) \
ImplClass* impl = ewk_object_cast<ImplClass*>(object); \
if (!impl) \
return __VA_ARGS__
#define EWK_OBJECT_DECLARE(_className) \
static const char* className() \
{ \
static const char* name = #_className; \
return name; \
} \
virtual const char* instanceClassName() const \
{ \
return className(); \
}
#endif // ewk_object_private_h
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