1 files changed, 74 insertions, 0 deletions
diff --git a/include/CommonAPI/DBus/DBusFreedesktopVariant.hpp b/include/CommonAPI/DBus/DBusFreedesktopVariant.hpp
new file mode 100644
index 0000000..31490d2
--- /dev/null
+++ b/include/CommonAPI/DBus/DBusFreedesktopVariant.hpp
@@ -0,0 +1,74 @@
+// Copyright (C) 2014-2015 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#if !defined (COMMONAPI_INTERNAL_COMPILATION)
+#error "Only <CommonAPI/CommonAPI.h> can be included directly, this file may disappear or change contents."
+#endif
+
+#include <CommonAPI/DBus/DBusTypeOutputStream.hpp>
+
+#ifndef COMMONAPI_DBUS_FREEDESKTOPVARIANT_HPP_
+#define COMMONAPI_DBUS_FREEDESKTOPVARIANT_HPP_
+
+namespace CommonAPI {
+namespace DBus {
+
+template<class Visitor, class Variant, typename ... _Types>
+struct ApplyTypeCompareVisitor;
+
+template<class Visitor, class Variant>
+struct ApplyTypeCompareVisitor<Visitor, Variant> {
+    static const uint8_t index = 0;
+
+    static uint8_t visit(Visitor&, const Variant&) {
+        // won't be called if the variant contains the requested type
+        assert(false);
+        return 0;
+    }
+};
+
+template<class Visitor, class Variant, typename _Type, typename ... _Types>
+struct ApplyTypeCompareVisitor<Visitor, Variant, _Type, _Types...> {
+    static const uint8_t index
+		= ApplyTypeCompareVisitor<Visitor, Variant, _Types...>::index + 1;
+
+    static uint8_t visit(Visitor &_visitor, const Variant &_variant) {
+        DBusTypeOutputStream output;
+        _Type current;
+        output.writeType(current);
+#ifdef WIN32
+        if (_visitor.operator()<_Type>(output.getSignature())) {
+#else
+        if (_visitor.template operator()<_Type>(output.getSignature())) {
+#endif
+            return index;
+        } else {
+            return ApplyTypeCompareVisitor<
+            			Visitor, Variant, _Types...
+				   >::visit(_visitor, _variant);
+        }
+    }
+};
+
+template<typename ... _Types>
+struct TypeCompareVisitor {
+public:
+	TypeCompareVisitor(const std::string &_type)
+		: type_(_type) {
+	}
+
+	template<typename _Type>
+	bool operator()(const std::string &_type) const {
+		return (_type == type_);
+	}
+
+private:
+	const std::string type_;
+};
+
+} // namespace DBus
+} // namespace CommonAPI
+
+#endif // COMMONAPI_DBUS_FREEDESKTOPVARIANT_HPP_