serializerfactory.h

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/*
 Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.

 Governed by the TrueCrypt License 2.6 the full text of which is contained
 in the file License.txt included in TrueCrypt binary and source code
 distribution packages.
*/

#ifndef TC_HEADER_Platform_SerializerFactory
#define TC_HEADER_Platform_SerializerFactory

#include <typeinfo>
#include "PlatformBase.h"
#include "StringConverter.h"

namespace TrueCrypt
{
	class Serializable;

	class SerializerFactory
	{
	public:
		~SerializerFactory ();

		static void Deinitialize ();
		static string GetName (const type_info &typeInfo);
		static Serializable *GetNewSerializable (const string &typeName);
		static void Initialize ();

		struct MapEntry
		{
			MapEntry () { }
			MapEntry (const string &typeName, Serializable* (*getNewPtr) ())
				: TypeName (typeName), GetNewPtr (getNewPtr) { }

			MapEntry &operator= (const MapEntry &right)
			{
				TypeName = right.TypeName;
				GetNewPtr = right.GetNewPtr;
				return *this;
			}

			string TypeName;
			Serializable* (*GetNewPtr) ();
		};

		static map <string, MapEntry> *NameToTypeMap;
		static map <string, string> *TypeToNameMap;

	protected:
		SerializerFactory ();

		static int UseCount;
	};

}

#define TC_SERIALIZER_FACTORY_ADD_EXCEPTION_SET(TYPE) \
	struct TYPE##SerializerFactoryInitializer \
	{ \
		TYPE##SerializerFactoryInitializer () \
		{ \
			SerializerFactory::Initialize(); \
			TC_EXCEPTION_SET; \
		} \
		~TYPE##SerializerFactoryInitializer () \
		{ \
			SerializerFactory::Deinitialize(); \
		} \
	}; \
	static TYPE##SerializerFactoryInitializer TYPE##SerializerFactoryInitializer

#define TC_SERIALIZER_FACTORY_ADD_CLASS(TYPE) \
	struct TYPE##SerializerFactoryInitializer \
	{ \
		TYPE##SerializerFactoryInitializer () \
		{ \
			SerializerFactory::Initialize(); \
			TC_SERIALIZER_FACTORY_ADD (TYPE); \
		} \
		~TYPE##SerializerFactoryInitializer () \
		{ \
			SerializerFactory::Deinitialize(); \
		} \
	}; \
	static TYPE##SerializerFactoryInitializer TYPE##SerializerFactoryInitializerInst

#define TC_SERIALIZER_FACTORY_ADD(TYPE) \
	(*SerializerFactory::NameToTypeMap)[#TYPE] = SerializerFactory::MapEntry (StringConverter::GetTypeName (typeid (TYPE)), &TYPE::GetNewSerializable); \
	(*SerializerFactory::TypeToNameMap)[StringConverter::GetTypeName (typeid (TYPE))] = #TYPE


#endif // TC_HEADER_Platform_SerializerFactory