Crazy factory implementation

src/iterator/IteratorImplementation.h

@@ -0,0 +1,54 @@
+#ifndef ITERATOR_IMPLEMENTATION_H
+#define ITERATOR_IMPLEMENTATION_H
+
+#include "../ifcparse/IfcFile.h"
+#include "../ifcgeom/IfcGeomIteratorSettings.h"
+
+#include <boost/function.hpp>
+
+#include <map>
+#include <string>
+
+template <typename P>
+class IteratorImplementation;
+
+typedef boost::function2<IteratorImplementation<float>*, const IfcGeom::IteratorSettings&, IfcParse::IfcFile*> iterator_float_fn;
+typedef boost::function2<IteratorImplementation<double>*, const IfcGeom::IteratorSettings&, IfcParse::IfcFile*> iterator_double_fn;
+
+template <typename P>
+struct get_factory_type {};
+
+template <>
+struct get_factory_type<float> {
+	typedef iterator_float_fn type;
+};
+
+template <>
+struct get_factory_type<double> {
+	typedef iterator_double_fn type;
+};
+
+template <typename P>
+class IteratorFactoryImplementation : public std::map<std::string, typename get_factory_type<P>::type> {
+public:
+	IteratorFactoryImplementation();
+	void bind(const std::string& schema_name, typename get_factory_type<P>::type fn);
+};
+
+template <typename P>
+IteratorFactoryImplementation<P>& iterator_implementations();
+
+template <class T>
+class Registrar {
+public:
+	Registrar(const std::string& schema_name, const typename get_factory_type<typename T::Precision>::type& fn) {
+		iterator_implementations<typename T::Precision>().bind(schema_name, fn);
+	}
+};
+
+template <typename T>
+class IteratorImplementation {
+
+};
+
+#endif