/*
**  ClanLib SDK
**  Copyright (c) 1997-2015 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
*/


#pragma once

#include "resource.h"

namespace clan
{
/// \addtogroup clanCore_Resources clanCore Resources
/// \{

/// \brief Resource proxy of any type
class ResourceObject
{
public:
	ResourceObject()
	{
	}

	template<typename Type>
	ResourceObject(const Resource<Type> &resource)
		: object(resource.handle())
	{
	}

	bool is_null() const { return !object; }

	template<typename Type>
	Resource<Type> cast()
	{
		if (object)
		{
			std::shared_ptr<Resource_Impl<Type> > resource = std::dynamic_pointer_cast<Resource_Impl<Type> >(object);
			if (!resource)
				throw Exception("ResourceObject type mismatch");
			return Resource<Type>(resource);
		}
		else
		{
			throw Exception("ResourceObject is null");
		}
	}

	bool operator<(const ResourceObject &other) const { return object < other.object; }
	bool operator<=(const ResourceObject &other) const { return object <= other.object; }
	bool operator>(const ResourceObject &other) const { return object > other.object; }
	bool operator>=(const ResourceObject &other) const { return object >= other.object; }
	bool operator==(const ResourceObject &other) const { return object == other.object; }
	bool operator!=(const ResourceObject &other) const { return object != other.object; }

private:
	std::shared_ptr<Resource_BaseImpl> object;
};

}

/// \}
