public TreeRouter Build(int version)
{
var trees = new Dictionary<int, UrlMatchingTree>();
foreach (var entry in _matchingEntries)
{
UrlMatchingTree tree;
if (!trees.TryGetValue(entry.Order, out tree))
{
tree = new UrlMatchingTree(entry.Order);
trees.Add(entry.Order, tree);
}
AddEntryToTree(tree, entry);
}
return new TreeRouter(
_target,
trees.Values.OrderBy(tree => tree.Order).ToArray(),
_generatingEntries,
_logger,
_constraintLogger,
version);
}
private void AddEntryToTree(UrlMatchingTree tree, TreeRouteMatchingEntry entry)
{
var current = tree.Root;
for (var i = 0; i < entry.RouteTemplate.Segments.Count; i++)
{
var segment = entry.RouteTemplate.Segments[i];
if (!segment.IsSimple)
{
// Treat complex segments as a constrained parameter
if (current.ConstrainedParameters == null)
{
current.ConstrainedParameters = new UrlMatchingNode(length: i + 1);
}
current = current.ConstrainedParameters;
continue;
}
Debug.Assert(segment.Parts.Count == 1);
var part = segment.Parts[0];
if (part.IsLiteral)
{
UrlMatchingNode next;
if (!current.Literals.TryGetValue(part.Text, out next))
{
next = new UrlMatchingNode(length: i + 1);
current.Literals.Add(part.Text, next);
}
current = next;
continue;
}
if (part.IsParameter && (part.IsOptional || part.IsCatchAll))
{
current.Matches.Add(entry);
}
if (part.IsParameter && part.InlineConstraints.Any() && !part.IsCatchAll)
{
if (current.ConstrainedParameters == null)
{
current.ConstrainedParameters = new UrlMatchingNode(length: i + 1);
}
current = current.ConstrainedParameters;
continue;
}
if (part.IsParameter && !part.IsCatchAll)
{
if (current.Parameters == null)
{
current.Parameters = new UrlMatchingNode(length: i + 1);
}
current = current.Parameters;
continue;
}
if (part.IsParameter && part.InlineConstraints.Any() && part.IsCatchAll)
{
if (current.ConstrainedCatchAlls == null)
{
current.ConstrainedCatchAlls = new UrlMatchingNode(length: i + 1);
}
current = current.ConstrainedCatchAlls;
continue;
}
if (part.IsParameter && part.IsCatchAll)
{
if (current.CatchAlls == null)
{
current.CatchAlls = new UrlMatchingNode(length: i + 1);
}
current = current.CatchAlls;
continue;
}
Debug.Fail("We shouldn't get here.");
}
current.Matches.Add(entry);
current.Matches.Sort((x, y) =>
{
var result = x.Precedence.CompareTo(y.Precedence);
return result == 0 ? x.RouteTemplate.TemplateText.CompareTo(y.RouteTemplate.TemplateText) : result;
});
}