private static string Shortest(SuffixTree tree)
{
var shortest = new Match(tree.Root, Enumerable.Empty <SuffixTree.Node>());
var queue = new Queue <Match>();
queue.Enqueue(shortest);
while (queue.Any())
{
var current = queue.Dequeue();
if (shortest.Node == tree.Root ||
(tree.ToNodeText(current.Node).EndsWith("$") && current.Node.Length > 1 && current.Distance() <= shortest.Distance()))
{
shortest = current;
}
var l = new List <SuffixTree.Node>(current.Lineage);
l.Add(current.Node);
foreach (var child in current.Node.Children)
{
queue.Enqueue(new Match(child, l));
}
}
var s = string.Format("{0}{1}", string.Join("", shortest.Lineage.Select(tree.ToText)), tree.ToText(shortest.Node)).Replace("$", "");
return(s);
}
public static SuffixTree ToSuffixTree(string text)
{
var result = new SuffixTree(text);
//Console.WriteLine(string.Join(", ", result.ToDebugText()));
for (var i = 0; i < text.Length; i++)
{
result.Merge(i, text.Length - i);
//Console.WriteLine(string.Join(", ", result.ToDebugText()));
}
return result;
}
