wow, its like resource management!

git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1063 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.Core/ResourceLoader.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.IO;
+using System.Reflection;
+
+namespace OpenRa.Core
+{
+	static class ResourceLoader
+	{
+		static Dictionary<string, Converter<Stream, IResource>> loaders = 
+			new Dictionary<string,Converter<Stream,IResource>>();
+
+		static ResourceLoader()
+		{
+			foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies())
+				BindTypes(a);
+
+			AppDomain.CurrentDomain.AssemblyLoad +=
+				delegate(object unused, AssemblyLoadEventArgs e) { BindTypes(e.LoadedAssembly); };
+		}
+
+		static void BindTypes(Assembly a)
+		{
+			foreach (Type t in a.GetTypes())
+				BindType(t);
+		}
+
+		static void BindType(Type t)
+		{
+			ResourceBindingAttribute a = Reflect.GetAttribute<ResourceBindingAttribute>(t);
+			if (a == null)
+				return;
+
+			ConstructorInfo ctor = t.GetConstructor(new Type[] { typeof(Stream) });
+			if (ctor == null)
+				return;
+
+			Converter<Stream, IResource> loader = delegate(Stream s)
+			{
+				return (IResource)ctor.Invoke(new object[] { s });
+			};
+
+			foreach (string extension in a.Extensions)
+				loaders.Add(extension, loader);
+		}
+
+		public static Converter<Stream, IResource> GetLoader(string extension)
+		{
+			Converter<Stream, IResource> result;
+			loaders.TryGetValue(extension.ToLowerInvariant(), out result);
+			return result;
+		}
+	}
+}