public IEnumerable <NamedThing> ReachableNamedThings(GraphStatement fromStatement, params NamedThing[] ignoredNamedThings)
{
if (fromStatement == null)
{
throw new ArgumentNullException("fromStatement");
}
if (ignoredNamedThings == null)
{
throw new ArgumentNullException("ignoredNamedThings");
}
var ignoredNTs = new HashSet <NamedThing>(ignoredNamedThings.Where(nt => nt != null));
var reachableNTs = new HashSet <NamedThing>(fromStatement.References);
reachableNTs.RemoveWhere(ignoredNTs.Contains);
var allReferences = statements.Where(s => s != fromStatement).Select(s => new HashSet <NamedThing>(s.References)).Where(r => r.Count > 0).ToList();
for (int i = allReferences.Count - 1; i >= 0; i--)
{
var refs = allReferences[i];
if (refs.Any(reachableNTs.Contains))
{
refs.RemoveWhere(ignoredNTs.Contains);
reachableNTs.UnionWith(refs);
allReferences.RemoveAt(i);
i = allReferences.Count - 1;
}
}
return(reachableNTs.Select(nt => nt));
}
public void Add(GraphStatement statement)
{
if (statement == null)
{
throw new ArgumentNullException("statement");
}
statements.Add(statement);
}