From a9e5b315e31e9d6b68d29cfdbd31507800043908 Mon Sep 17 00:00:00 2001
From: Mike Bierlee <m.bierlee@lostmoment.com>
Date: Tue, 27 May 2014 01:54:08 +0200
Subject: [PATCH] Add autowiring of concrete types in existing instances

---
 source/poodinis/autowire.d   | 16 ++++++++++++++++
 test/poodinis/autowiretest.d | 23 +++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 source/poodinis/autowire.d
 create mode 100644 test/poodinis/autowiretest.d

diff --git a/source/poodinis/autowire.d b/source/poodinis/autowire.d
new file mode 100644
index 0000000..e97ac43
--- /dev/null
+++ b/source/poodinis/autowire.d
@@ -0,0 +1,16 @@
+module poodinis.autowire;
+
+public import poodinis.container;
+
+enum Autowire;
+
+public void autowire(Type)(Container container, Type instance) {
+	import std.stdio;
+	foreach (member ; __traits(derivedMembers, Type)) {
+		foreach (attribute; mixin(`__traits(getAttributes, Type.` ~ member ~ `)`) ) {
+			if (is(attribute : Autowire)){
+				__traits(getMember, instance, member) = container.resolve!(typeof(__traits(getMember, instance, member)));
+			}
+		}
+	}
+}
\ No newline at end of file
diff --git a/test/poodinis/autowiretest.d b/test/poodinis/autowiretest.d
new file mode 100644
index 0000000..59b444a
--- /dev/null
+++ b/test/poodinis/autowiretest.d
@@ -0,0 +1,23 @@
+import poodinis.autowire;
+
+version(unittest) {
+	class ComponentA {
+	}
+	
+	class ComponentB {
+		public @Autowire ComponentA componentA;
+		
+		public bool componentIsNull() {
+			return componentA is null;
+		}
+	}
+	
+	// Test autowiring concrete type to existing instance
+	unittest {
+		auto container = new Container();
+		container.register!ComponentA;
+		ComponentB componentB = new ComponentB();
+		container.autowire!(ComponentB)(componentB);
+		assert(!componentB.componentIsNull(), "Autowirable dependency failed to autowire");
+	}
+}
\ No newline at end of file