public void Traverse(IEnumerable <TDependency> dependencies, ItemMatch pathAnchor,
bool pathAnchorIsCountMatch, AbstractPathMatch <TDependency, TItem>[] expectedPathMatches)
{
Dictionary <TItem, TDependency[]> incidentDependencies = _backwards
? AbstractItem <TItem> .CollectIncomingDependenciesMap(dependencies)
: AbstractItem <TItem> .CollectOutgoingDependenciesMap(dependencies);
_seenInnerPathStarts.Clear();
Paths.Clear();
Counts.Clear();
_onPath.Clear();
TItem[] uniqueStartItems = (pathAnchor == null
? incidentDependencies.Keys
: incidentDependencies.Keys.Where(i => pathAnchor.Matches(i).Success)).ToArray();
AbstractPathMatch <TDependency, TItem> endMatch;
AbstractPathMatch <TDependency, TItem>[] innerMatches;
int n = expectedPathMatches.Length;
if (n == 0)
{
endMatch = null;
innerMatches = expectedPathMatches;
}
else
{
endMatch = expectedPathMatches[n - 1];
innerMatches = expectedPathMatches.Take(n - 1).ToArray();
}
foreach (var item in uniqueStartItems.OrderBy(i => i.Name))
{
if (_seenInnerPathStarts.Add(item))
{
List <PathNode <TItem, TDependency> > up = Traverse(root: item,
incidentDependencies: incidentDependencies, expectedInnerPathMatches: innerMatches,
endMatch: endMatch, down: new DownInfo(pathAnchorIsCountMatch ? item : null));
if (up != null)
{
Paths.Add(item, up);
}
}
}
}