Mef import all types implementing an interface specified at runtime

Can i write a class to use mef to import all types implementing a specific interface and then specify this interface at run time. (i know i need to tag the implementors 开发者_JAVA技巧with export)

Example usage:

IEnumerable<IExcitingClass> excitingClasses = ClassImporter<IExcitingInterface>.ImportAllFrom(specifyDirectory);

Is this possible?

You can create a container using a DirectoryCatalog, and call container.GetExportedValues<IExcitingClass>. Is that what you want?

At run time you could only use string to specify your interface.

    public IEnumerable<object> GetAllInheritors(string interfaceName)
    {
        Assembly assembly = this.GetType().Assembly;
        foreach (var part in Container.Catalog.Parts)
        {
            Type type = assembly.GetType(part.ToString());
            if (type != null)
                if (type.GetInterface(interfaceName) != null)
                {
                    yield return part.CreatePart().GetExportedValue(part.ExportDefinitions.First());
                }
        }
    }