// TODO consolidate CreateOrGetDeepManager methods? Only diff is propGetter
/// <summary>
/// Creates a new NotificationChainManager for the given property, or returns an existing instance
/// </summary>
/// <typeparam name="T1"></typeparam>
/// <param name="propGetter"></param>
/// <returns></returns>
internal NotificationChainManager CreateOrGetManager <T1> (Expression <Func <T1> > propGetter)
where T1 : class
{
var propName = propGetter.GetPropertyOrFieldName();
NotificationChainManager mgr;
if (!myDeepChainManagers.TryGetValue(propName, out mgr))
{
myDeepChainManagers[propName] = mgr = new NotificationChainManager();
myDeepChainGetters[propName] = _ => propGetter.Compile().Invoke();
var currentValue = (T1)myDeepChainGetters[propName] (null);
if (currentValue != null)
{
mgr.Observe(currentValue);
}
}
return(mgr);
}
