98 lines
3.0 KiB
C#
98 lines
3.0 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Text;
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namespace Microsoft.AspNetCore.Routing.Patterns
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{
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/// <summary>
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/// Represents a parameter part in a route pattern. Instances of <see cref="RoutePatternParameterPart"/>
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/// are immutable.
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/// </summary>
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[DebuggerDisplay("{DebuggerToString()}")]
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public sealed class RoutePatternParameterPart : RoutePatternPart
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{
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internal RoutePatternParameterPart(
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string parameterName,
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object @default,
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RoutePatternParameterKind parameterKind,
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RoutePatternConstraintReference[] constraints)
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: base(RoutePatternPartKind.Parameter)
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{
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// See #475 - this code should have some asserts, but it can't because of the design of RouteParameterParser.
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Name = parameterName;
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Default = @default;
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ParameterKind = parameterKind;
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Constraints = constraints;
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}
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/// <summary>
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/// Gets the list of constraints associated with this parameter.
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/// </summary>
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public IReadOnlyList<RoutePatternConstraintReference> Constraints { get; }
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/// <summary>
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/// Gets the default value of this route parameter. May be null.
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/// </summary>
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public object Default { get; }
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/// <summary>
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/// Returns <c>true</c> if this part is a catch-all parameter.
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/// Otherwise returns <c>false</c>.
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/// </summary>
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public bool IsCatchAll => ParameterKind == RoutePatternParameterKind.CatchAll;
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/// <summary>
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/// Returns <c>true</c> if this part is an optional parameter.
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/// Otherwise returns <c>false</c>.
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/// </summary>
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public bool IsOptional => ParameterKind == RoutePatternParameterKind.Optional;
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/// <summary>
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/// Gets the <see cref="RoutePatternParameterKind"/> of this parameter.
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/// </summary>
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public RoutePatternParameterKind ParameterKind { get; }
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/// <summary>
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/// Gets the parameter name.
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/// </summary>
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public string Name { get; }
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internal override string DebuggerToString()
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{
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var builder = new StringBuilder();
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builder.Append("{");
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if (IsCatchAll)
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{
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builder.Append("*");
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}
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builder.Append(Name);
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foreach (var constraint in Constraints)
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{
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builder.Append(":");
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builder.Append(constraint.Constraint);
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}
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if (Default != null)
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{
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builder.Append("=");
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builder.Append(Default);
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}
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if (IsOptional)
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{
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builder.Append("?");
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}
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builder.Append("}");
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return builder.ToString();
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}
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}
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}
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