private static IEnumerable <FollowedPath> FollowPath(PSMElement element, FollowedPath followedPath)
{
List <FollowedPath> result = new List <FollowedPath>();
PSMTreeIterator it = new PSMTreeIterator(element);
followedPath.Add(element);
while (it.CanGoToParent())
{
it.GoToParent();
PSMClass psmClass = it.CurrentNode as PSMClass;
if (psmClass != null && psmClass.IsReferencedFromStructuralRepresentative())
{
foreach (PSMClass representative in
psmClass.Diagram.DiagramElements.Keys.OfType <PSMClass>().Where(rClass => rClass.RepresentedPSMClass == psmClass))
{
result.AddRange(FollowPath(representative, followedPath.Copy()));
}
}
followedPath.Add(it.CurrentNode);
}
if (followedPath.Last() is PSMClass && ((PSMClass)followedPath.Last()).HasElementLabel)
{
result.Add(followedPath);
}
return(result);
}
public FollowedPath Copy()
{
FollowedPath followedPath = new FollowedPath();
followedPath.AddRange(this);
return(followedPath);
}
/// <summary>
/// Returns all XPath expressions where PSM element can appear in an XML document. Each structural
/// representative in a diagram can contribute with one expression, where an element can appear.
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
public static IEnumerable <XPathExpr> PathsWhereElementAppears(PSMElement element)
{
List <FollowedPath> result = new List <FollowedPath>();
FollowedPath followedPath = new FollowedPath();
result.AddRange(FollowPath(element, followedPath));
return(from p in result
where p.Count > 0 && PSMTreeIterator.IsInSignificantSubtree(p.Last())
select p.ToXPath());
}
