private bool Equals(RoutePatternPart x, RoutePatternPart y)
{
if (x.GetType() != y.GetType())
{
return(false);
}
if (x.IsLiteral && y.IsLiteral)
{
return(Equals((RoutePatternLiteralPart)x, (RoutePatternLiteralPart)y));
}
else if (x.IsParameter && y.IsParameter)
{
return(Equals((RoutePatternParameterPart)x, (RoutePatternParameterPart)y));
}
else if (x.IsSeparator && y.IsSeparator)
{
return(Equals((RoutePatternSeparatorPart)x, (RoutePatternSeparatorPart)y));
}
Debug.Fail("This should not be reachable. Do you need to update the comparison logic?");
return(false);
}
private static RoutePattern PatternCore(
string rawText,
IDictionary <string, object> defaults,
IDictionary <string, object> constraints,
IEnumerable <RoutePatternPathSegment> segments)
{
// We want to merge the segment data with the 'out of line' defaults and constraints.
//
// This means that for parameters that have 'out of line' defaults we will modify
// the parameter to contain the default (same story for constraints).
//
// We also maintain a collection of defaults and constraints that will also
// contain the values that don't match a parameter.
//
// It's important that these two views of the data are consistent. We don't want
// values specified out of line to have a different behavior.
var updatedDefaults = new Dictionary <string, object>(StringComparer.OrdinalIgnoreCase);
if (defaults != null)
{
foreach (var kvp in defaults)
{
updatedDefaults.Add(kvp.Key, kvp.Value);
}
}
var updatedConstraints = new Dictionary <string, List <RoutePatternConstraintReference> >(StringComparer.OrdinalIgnoreCase);
if (constraints != null)
{
foreach (var kvp in constraints)
{
updatedConstraints.Add(kvp.Key, new List <RoutePatternConstraintReference>()
{
Constraint(kvp.Value),
});
}
}
var parameters = new List <RoutePatternParameterPart>();
var updatedSegments = segments.ToArray();
for (var i = 0; i < updatedSegments.Length; i++)
{
var segment = VisitSegment(updatedSegments[i]);
updatedSegments[i] = segment;
for (var j = 0; j < segment.Parts.Count; j++)
{
if (segment.Parts[j] is RoutePatternParameterPart parameter)
{
parameters.Add(parameter);
}
}
}
return(new RoutePattern(
rawText,
updatedDefaults,
updatedConstraints.ToDictionary(kvp => kvp.Key, kvp => (IReadOnlyList <RoutePatternConstraintReference>)kvp.Value.ToArray()),
parameters.ToArray(),
updatedSegments.ToArray()));
RoutePatternPathSegment VisitSegment(RoutePatternPathSegment segment)
{
var updatedParts = new RoutePatternPart[segment.Parts.Count];
for (var i = 0; i < segment.Parts.Count; i++)
{
var part = segment.Parts[i];
updatedParts[i] = VisitPart(part);
}
return(SegmentCore(updatedParts));
}
RoutePatternPart VisitPart(RoutePatternPart part)
{
if (!part.IsParameter)
{
return(part);
}
var parameter = (RoutePatternParameterPart)part;
var @default = parameter.Default;
if (updatedDefaults.TryGetValue(parameter.Name, out var newDefault))
{
if (parameter.Default != null)
{
var message = Resources.FormatTemplateRoute_CannotHaveDefaultValueSpecifiedInlineAndExplicitly(parameter.Name);
throw new InvalidOperationException(message);
}
if (parameter.IsOptional)
{
var message = Resources.TemplateRoute_OptionalCannotHaveDefaultValue;
throw new InvalidOperationException(message);
}
@default = newDefault;
}
if (parameter.Default != null)
{
updatedDefaults.Add(parameter.Name, parameter.Default);
}
if (!updatedConstraints.TryGetValue(parameter.Name, out var parameterConstraints) &&
parameter.Constraints.Count > 0)
{
parameterConstraints = new List <RoutePatternConstraintReference>();
updatedConstraints.Add(parameter.Name, parameterConstraints);
}
if (parameter.Constraints.Count > 0)
{
parameterConstraints.AddRange(parameter.Constraints);
}
return(ParameterPartCore(
parameter.Name,
@default,
parameter.ParameterKind,
(IEnumerable <RoutePatternConstraintReference>)parameterConstraints ?? Array.Empty <RoutePatternConstraintReference>()));
}
}
