public static IProducer <T> GetStaticProducer <T>(this StaticPortMetadata portMetadata, PortConfiguration portConfiguration, object instance)
{
/* old implementation
* dynamic obj = GetStaticConnector(instance, portMetadata, portConfiguration);
* return (IProducer<T>)obj;
*/
object obj = GetStaticConnector(instance, portMetadata, portConfiguration);
var objType = obj.GetType();
if (typeof(IProducer <T>).IsAssignableFrom(objType))
{
return((IProducer <T>)obj);
}
if (objType.IsGenericType)
{
var interfaceName = typeof(IProducer <>).Name;//should be "IProducer`1"
var @interface = objType.GetInterface(interfaceName);
if (@interface != null)
{
var typeArg = @interface.GetGenericArguments().Single();
if (typeArg.CanBeAssignedOrCastTo(typeof(T)))
{
var methodInfo = typeof(HelperExtensions).GetMethod(nameof(Cast)).MakeGenericMethod(new[] { typeArg, typeof(T) });
var result = (IProducer <T>)methodInfo.Invoke(obj: null, new[] { (dynamic)obj, false });
return(result);
}
}
}
throw new InvalidOperationException("returned object is not a valid type");
}
private static dynamic GetStaticConnector(this object instance, StaticPortMetadata portMetadata, PortConfiguration portConfiguration)
{
Debug.Assert(Equals(portMetadata.Identifier, portConfiguration.Identifier));
dynamic prop = portMetadata.Property.GetValue(instance);
if (prop is null)
{
throw new Exception("instance connector is null");
}
switch (portMetadata.Aggregation)
{
case PortAggregation.Object:
return(prop);
case PortAggregation.List:
return(prop[(int)portConfiguration.Index]);
case PortAggregation.Dictionary:
return(prop[(string)portConfiguration.Index]);
default:
throw new InvalidOperationException();
}
}
public static IConsumer <T> GetStaticConsumer <T>(this StaticPortMetadata portMetadata, PortConfiguration portConfiguration, object instance)
{
dynamic obj = GetStaticConnector(instance, portMetadata, portConfiguration);
return((IConsumer <T>)obj);
}