public virtual IThing DescribedThing(IThing item)
{
IThing result = item;
if (item == null)
{
return(null);
}
ILink linkResult = null;
ICollection <IThing> itemDone = new Set <IThing>();
var stack = new Stack <IThing>();
stack.Push(item);
while (stack.Count > 0)
{
result = stack.Pop();
if (itemDone.Contains(result))
{
break;
}
itemDone.Add(result);
foreach (var link in Source.Edges(result))
{
var resultId = result.Id;
var idLink = (ILink <Id>)link;
if (idLink.Marker == 0)
{
continue;
}
if (idLink.Leaf == resultId)
{
if (descriptions.Contains(idLink.Marker) && SchemaFacade.DescriptionableThing(link.Root))
{
result = link.Root;
stack.Clear();
break;
}
}
else if (idLink.Root == resultId)
{
if (describedMarkers.ContainsKey(idLink.Marker) && SchemaFacade.DescriptionableThing(link.Root))
{
stack.Push(link);
linkResult = link;
}
}
}
}
while (result is ILink)
{
result = ((ILink)result).Leaf;
}
if (result == linkResult)
{
return(item);
}
return(result);
}
public virtual bool SchemaItemFilter(IThing thing)
{
if (thing == null)
{
return(false);
}
bool result = true;
foreach (ILink link in Source.Edges(thing))
{
var idLink = (ILink <Id>)link;
if (idLink.Marker != 0)
{
if (idLink.Leaf == thing.Id && descriptions.Contains(idLink.Marker))
{
return(!SchemaFacade.DescriptionableThing(link.Root));
}
}
}
return(result);
}
public virtual IEnumerable <ILink> ThingToDisplayPath(IThing item)
{
// REMARK: this is duplicate code with ThingToDisplay!!
var path = new Stack <ILink> ();
IThing result = item;
if (item == null)
{
return(null);
}
ILink linkResult = null;
ICollection <IThing> itemDone = new Set <IThing>();
var stack = new Stack <IThing>();
if (SchemaFacade.DescriptionableThing(item))
{
stack.Push(item);
}
while (stack.Count > 0)
{
result = stack.Pop();
if (itemDone.Contains(result))
{
continue;
}
itemDone.Add(result);
foreach (ILink link in Source.Edges(result))
{
var resultId = result.Id;
var idLink = (ILink <Id>)link;
if (idLink.Marker == 0)
{
continue;
}
if (idLink.Root == resultId)
{
if (descriptions.Contains(idLink.Marker))
{
result = link.Leaf;
path.Push(link);
stack.Clear();
break;
}
}
else if (idLink.Leaf == resultId)
{
if (describedMarkers.ContainsKey(idLink.Marker))
{
path.Push(link);
stack.Push(link);
linkResult = link;
}
}
}
if (SchemaFacade.DescriptionableThing(result))
{
stack.Push(result);
}
}
if (result == linkResult)
{
return(new EmptyCollection <ILink>());
}
return(path);
}