// Compute the precedence for generating a url
// e.g.: /api/template == 5.5
// /api/template/{id} == 5.53
// /api/{id:int} == 5.4
// /api/template/{id:int} == 5.54
public static decimal ComputeOutbound(RouteTemplate template)
{
ValidateSegementLength(template.Segments.Count);
// Each precedence digit corresponds to one decimal place. For example, 3 segments with precedences 2, 1,
// and 4 results in a combined precedence of 2.14 (decimal).
var precedence = 0m;
for (var i = 0; i < template.Segments.Count; i++)
{
var segment = template.Segments[i];
var digit = ComputeOutboundPrecedenceDigit(segment);
Debug.Assert(digit >= 0 && digit < 10);
precedence += decimal.Divide(digit, (decimal)Math.Pow(10, i));
}
return(precedence);
}
public TemplateMatcher(
RouteTemplate template,
RouteValueDictionary defaults)
{
if (template == null)
{
throw new ArgumentNullException(nameof(template));
}
Template = template;
Defaults = defaults ?? new RouteValueDictionary();
// Perf: cache the default value for each parameter (other than complex segments).
_hasDefaultValue = new bool[Template.Segments.Count];
_defaultValues = new object[Template.Segments.Count];
for (var i = 0; i < Template.Segments.Count; i++)
{
var segment = Template.Segments[i];
if (!segment.IsSimple)
{
continue;
}
var part = segment.Parts[0];
if (!part.IsParameter)
{
continue;
}
if (Defaults.TryGetValue(part.Name, out var value))
{
_hasDefaultValue[i] = true;
_defaultValues[i] = value;
}
}
var routePattern = Template.ToRoutePattern();
_routePatternMatcher = new RoutePatternMatcher(routePattern, Defaults);
}