Junil Um
http://blog.powerumc.kr
Introduction
MEFGeneric is a framework to support CLR Generic types in MEF (Managed Extensibility Framework).
This is require Mef Framework if you need code on .NET Framework 3.0 or C# 2.0 under.
Background
MEF does not support open generic types. Therefore, open generic type classes cannot utilize MEF Composition. But, via MEFGeneric, changing and/or extending current MEF source code allows use of open generic types in MEF.
###Example
The following source code does not work in MEF, but using MEFGeneric, you can resolve and compose objects.
Catalog and Composition
var catalog = new AggregateCatalog(new AssemblyCatalog(Assembly.GetExecutingAssembly()));
var genericCatalog = new GenericCatalog(catalog);
var container = new CompositionContainer(genericCatalog);
// Export Definition
public interface IUMC<T>
{
void Say();
}
// Important : via only MEFGeneric, you can export definition of IUMC<> generic types.
[Export(typeof(IUMC<>))]
public class UMC<T> : IUMC<T>
{
#region IUMC<T> Member
public void Say()
{
Console.WriteLine(typeof(T).FullName);
}
#endregion
}Container Resolving / Injection
container.GetExportedValueOrDefault<IUMC<int>>().Say();
container.GetExportedValueOrDefault<IUMC<string>>().Say();
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