1 files changed, 11 insertions, 4 deletions
diff --git a/src/engine/machina/Stateful.hpp b/src/engine/machina/Stateful.hpp
index 1a72db5..8dbf23d 100644
--- a/src/engine/machina/Stateful.hpp
+++ b/src/engine/machina/Stateful.hpp
@@ -18,21 +18,28 @@
 #ifndef MACHINA_STATEFUL_HPP
 #define MACHINA_STATEFUL_HPP
 
+#include <stdint.h>
+
+#include "redlandmm/World.hpp"
 #include "redlandmm/Model.hpp"
 
 namespace Machina {
 
 class Stateful {
 public:
+	Stateful();
+
 	virtual ~Stateful() {}
 
 	virtual void write_state(Redland::Model& model) = 0;
 
-	Redland::Node id() const                      { return _id; }
-	void          set_id(const Redland::Node& id) { _id = id; }
+	Redland::Node id(Redland::World& world) const;
+
+private:
+	static uint64_t _next_id;
 
-protected:
-	Redland::Node _id;
+	uint64_t              _id;
+	mutable Redland::Node _rdf_id;
 };
 
 } // namespace Machina