From e88ffd5209d58118fcc947a060c35504316da855 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Wed, 30 Nov 2016 16:08:09 +0100
Subject: TypeHelper so we can centrally define the type dispatch

Not pretty, but that at least allows us to centrally define
the string to type dispatch (It's somehow very hard to do in
C++ without repeating all types over and over in various interfaces).
---
 common/storage/entitystore.cpp | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

(limited to 'common/storage')

diff --git a/common/storage/entitystore.cpp b/common/storage/entitystore.cpp
index f6b8f43..b6251b6 100644
--- a/common/storage/entitystore.cpp
+++ b/common/storage/entitystore.cpp
@@ -27,6 +27,7 @@
 #include "index.h"
 #include "bufferutils.h"
 #include "entity_generated.h"
+#include "applicationdomaintype_p.h"
 
 #include "mail.h"
 #include "folder.h"
@@ -57,20 +58,12 @@ public:
         return transaction;
     }
 
-    template<typename ...Args>
-    void configure(const QByteArray &type, Args && ... args)
-    {
-        if (type == ApplicationDomain::getTypeName<ApplicationDomain::Folder>()) {
-            ApplicationDomain::TypeImplementation<ApplicationDomain::Folder>::configure(std::forward<Args...>(args...));
-        } else if (type == ApplicationDomain::getTypeName<ApplicationDomain::Mail>()) {
-            ApplicationDomain::TypeImplementation<ApplicationDomain::Mail>::configure(std::forward<Args...>(args...));
-        } else if (type == ApplicationDomain::getTypeName<ApplicationDomain::Event>()) {
-            ApplicationDomain::TypeImplementation<ApplicationDomain::Event>::configure(std::forward<Args...>(args...));
-        } else {
-            Q_ASSERT(false);
-            SinkError() << "Unkonwn type " << type;
+    template <class T>
+    struct ConfigureHelper {
+        void operator()(TypeIndex &arg) const {
+            ApplicationDomain::TypeImplementation<T>::configure(arg);
         }
-    }
+    };
 
     TypeIndex &cachedIndex(const QByteArray &type)
     {
@@ -78,7 +71,7 @@ public:
             return *indexByType.value(type);
         }
         auto index = QSharedPointer<TypeIndex>::create(type);
-        configure(type, *index);
+        TypeHelper<ConfigureHelper>{type}.template operator()<void>(*index);
         indexByType.insert(type, index);
         return *index;
 
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