static public IReadOnlyList <T> EmptyIfNull <T>(this IEnumerable <T> _this) => (_this == null) ? Empty.List <T>() : _this.ToArray();
static IEnumerable <PropertyInfoWithPrefix> _GetAllPublicImplicitInstancePropsRecursive <TOwner, TTypeToExpand>(object owner, Maybe <IPropertyDescriptionChain <TOwner> > chain)
where TOwner : class
where TTypeToExpand : class
{
var directProps = Introspector.GetAllPublicImplicitInstanceProps(owner.GetType());
var nodesToExpand = directProps
.Where(x => x.PropertyType.Extends <TTypeToExpand>())
.ToList();
foreach (var iDirect in directProps)
{
var newChain = (chain.Exists) ?
(chain.Value.Add(new PropertyDescription(chain.Value.Nodes.Last().ValueType, typeof(TTypeToExpand), iDirect.Name)))
:
(new PropertyDescriptionChain <TOwner, TTypeToExpand>(new PropertyDescription <TOwner, TTypeToExpand>(propName: iDirect.Name), Empty.List <IPropertyDescription>()))
;
if (!iDirect.PropertyType.Extends <TTypeToExpand>())
{
yield return(new PropertyInfoWithPrefix(newChain, iDirect, owner));
}
else
{
foreach (var item in _GetAllPublicImplicitInstancePropsRecursive <TOwner, TTypeToExpand>(iDirect, new Maybe <IPropertyDescriptionChain <TOwner> >(newChain)))
{
yield return(item);
}
}
}
}
