Add config plugin class.

fairmq/Properties.h

@@ -0,0 +1,74 @@
+/********************************************************************************
+ * Copyright (C) 2014-2018 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH  *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+#ifndef FAIR_MQ_PROPERTIES_H
+#define FAIR_MQ_PROPERTIES_H
+
+#include <fairmq/EventManager.h>
+
+#include <boost/any.hpp>
+#include <boost/core/demangle.hpp>
+
+#include <functional>
+#include <map>
+#include <unordered_map>
+#include <string>
+#include <typeindex>
+#include <typeinfo>
+#include <utility> // pair
+
+namespace fair
+{
+namespace mq
+{
+
+using Property = boost::any;
+using Properties = std::map<std::string, Property>;
+
+struct PropertyChange : Event<std::string> {};
+struct PropertyChangeAsString : Event<std::string> {};
+
+class PropertyHelper
+{
+  public:
+    template<typename T>
+    static void AddType(std::string label = "")
+    {
+        if (label == "") {
+            label = boost::core::demangle(typeid(T).name());
+        }
+        fTypeInfos[std::type_index(typeid(T))] = [label](const fair::mq::Property& p) {
+            std::stringstream ss;
+            ss << boost::any_cast<T>(p);
+            return std::pair<std::string, std::string>{ss.str(), label};
+        };
+    }
+
+    static std::string ConvertPropertyToString(const Property& p)
+    {
+        return fTypeInfos.at(p.type())(p).first;
+    }
+
+    // returns <valueAsString, typenameAsString>
+    static std::pair<std::string, std::string> GetPropertyInfo(const Property& p)
+    {
+        try {
+            return fTypeInfos.at(p.type())(p);
+        } catch (std::out_of_range& oor) {
+            return {"[unidentified_type]", "[unidentified_type]"};
+        }
+    }
+
+    static std::unordered_map<std::type_index, void(*)(const fair::mq::EventManager&, const std::string&, const fair::mq::Property&)> fEventEmitters;
+  private:
+    static std::unordered_map<std::type_index, std::function<std::pair<std::string, std::string>(const fair::mq::Property&)>> fTypeInfos;
+};
+
+}
+}
+
+#endif /* FAIR_MQ_PROPERTIES_H */