Castle optional(property) dependency problem, in realtion with Typed Factory facility -

i'm facing following problem

given pseudo code,

  public interface ia   {      ...   }    public interface ib   {       ia someoptionaldependency;    }    public interface irepositorya   {      ...      ia getdefault();      ia get(object id);   }    public interface ifactoryb   {        ib create();        ib create(ia a);   }     public class b : ib   {       public b(irepositorya repoa)       {          _repoa=repoa;        }        public ia someoptionaldependency {          get{              if (_someoptionaldependency==null)                  _someoptionaldependency=_repoa.getdefault();             return _someoptionaldependency;          }          set{             if (_someoptionaldependency!=null)                throw(new exception("this read only");               _someoptionaldependency=value;          }      }        private ia _someoptionaldependency;       private irepositorya _repoa;   }    [testfixture]   public class test   {         [test]         public void factorymethodsshouldwork()         {             var factoryb=container.resolve<ifactoryb>();             var repoa=container.resolve<irepositorya>();             var somea=repoa.get(someid);               var b1=factoryb.create();             var b2=factoryb.create(somea);              assert.areequal(repoa.getdefault(),b1.someoptionaldependency);             assert.areequal(somea,b1.someoptionaldependency);           }    } 

i'm using typed factory facility factory, , registering container. test don't pass, because containter resolve optional dependency of , put new object on it, someoptionaldependency never null; here tricky thing, if setup dependency [donotwire], not resolve it(obviously) in case, both factory methods, sort of need windsor resolve named args factory facility injects in resolving pipeline , not typed resolving. there way configure or extend windsor this. missing point here? can work around doing factory wrapper set value , setting [donotwire], have problem in several factories, , seems should way work in more proper way

thanks in advance