121 lines
4.4 KiB
C#
121 lines
4.4 KiB
C#
// This file is part of YamlDotNet - A .NET library for YAML.
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// Copyright (c) Antoine Aubry and contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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using System;
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using System.Collections.Generic;
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using YamlDotNet.Core;
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namespace YamlDotNet.RepresentationModel
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{
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/// <summary>
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/// Represents an alias node in the YAML document.
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/// </summary>
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internal class YamlAliasNode : YamlNode
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="YamlAliasNode"/> class.
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/// </summary>
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/// <param name="anchor">The anchor.</param>
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internal YamlAliasNode(AnchorName anchor)
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{
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Anchor = anchor;
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}
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/// <summary>
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/// Resolves the aliases that could not be resolved when the node was created.
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/// </summary>
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/// <param name="state">The state of the document.</param>
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internal override void ResolveAliases(DocumentLoadingState state)
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{
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throw new NotSupportedException("Resolving an alias on an alias node does not make sense");
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}
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/// <summary>
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/// Saves the current node to the specified emitter.
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/// </summary>
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/// <param name="emitter">The emitter where the node is to be saved.</param>
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/// <param name="state">The state.</param>
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internal override void Emit(IEmitter emitter, EmitterState state)
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{
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throw new NotSupportedException("A YamlAliasNode is an implementation detail and should never be saved.");
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}
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/// <summary>
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/// Accepts the specified visitor by calling the appropriate Visit method on it.
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/// </summary>
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/// <param name="visitor">
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/// A <see cref="IYamlVisitor"/>.
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/// </param>
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public override void Accept(IYamlVisitor visitor)
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{
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throw new NotSupportedException("A YamlAliasNode is an implementation detail and should never be visited.");
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}
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/// <summary />
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public override bool Equals(object? obj)
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{
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return obj is YamlAliasNode other
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&& Equals(other)
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&& Equals(Anchor, other.Anchor);
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}
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/// <summary>
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/// Serves as a hash function for a particular type.
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/// </summary>
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/// <returns>
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/// A hash code for the current <see cref="T:System.Object"/>.
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/// </returns>
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public override int GetHashCode()
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{
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return base.GetHashCode();
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}
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/// <summary>
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/// Returns a <see cref="string"/> that represents this instance.
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/// </summary>
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/// <returns>
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/// A <see cref="string"/> that represents this instance.
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/// </returns>
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internal override string ToString(RecursionLevel level)
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{
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return "*" + Anchor;
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}
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/// <summary>
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/// Recursively enumerates all the nodes from the document, starting on the current node,
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/// and throwing <see cref="MaximumRecursionLevelReachedException"/>
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/// if <see cref="RecursionLevel.Maximum"/> is reached.
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/// </summary>
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internal override IEnumerable<YamlNode> SafeAllNodes(RecursionLevel level)
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{
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yield return this;
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}
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/// <summary>
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/// Gets the type of node.
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/// </summary>
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public override YamlNodeType NodeType
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{
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get { return YamlNodeType.Alias; }
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}
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}
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}
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