Import YamlDotNet.
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Assets/YamlDotNet/RepresentationModel/YamlSequenceNode.cs
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301
Assets/YamlDotNet/RepresentationModel/YamlSequenceNode.cs
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// 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 System.Diagnostics;
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using System.Text;
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using YamlDotNet.Core;
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using YamlDotNet.Core.Events;
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using YamlDotNet.Serialization;
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using static YamlDotNet.Core.HashCode;
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namespace YamlDotNet.RepresentationModel
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{
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/// <summary>
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/// Represents a sequence node in the YAML document.
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/// </summary>
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[DebuggerDisplay("Count = {children.Count}")]
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public sealed class YamlSequenceNode : YamlNode, IEnumerable<YamlNode>, IYamlConvertible
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{
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private readonly IList<YamlNode> children = new List<YamlNode>();
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/// <summary>
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/// Gets the collection of child nodes.
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/// </summary>
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/// <value>The children.</value>
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public IList<YamlNode> Children
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{
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get
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{
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return children;
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}
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}
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/// <summary>
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/// Gets or sets the style of the node.
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/// </summary>
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/// <value>The style.</value>
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public SequenceStyle Style { get; set; }
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/// <summary>
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/// Initializes a new instance of the <see cref="YamlSequenceNode"/> class.
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/// </summary>
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internal YamlSequenceNode(IParser parser, DocumentLoadingState state)
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{
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Load(parser, state);
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}
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private void Load(IParser parser, DocumentLoadingState state)
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{
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var sequence = parser.Consume<SequenceStart>();
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Load(sequence, state);
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Style = sequence.Style;
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var hasUnresolvedAliases = false;
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while (!parser.TryConsume<SequenceEnd>(out var _))
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{
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var child = ParseNode(parser, state);
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children.Add(child);
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hasUnresolvedAliases |= child is YamlAliasNode;
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}
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if (hasUnresolvedAliases)
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{
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state.AddNodeWithUnresolvedAliases(this);
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="YamlSequenceNode"/> class.
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/// </summary>
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public YamlSequenceNode()
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="YamlSequenceNode"/> class.
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/// </summary>
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public YamlSequenceNode(params YamlNode[] children)
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: this((IEnumerable<YamlNode>)children)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="YamlSequenceNode"/> class.
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/// </summary>
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public YamlSequenceNode(IEnumerable<YamlNode> children)
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{
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foreach (var child in children)
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{
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this.children.Add(child);
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}
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}
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/// <summary>
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/// Adds the specified child to the <see cref="Children"/> collection.
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/// </summary>
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/// <param name="child">The child.</param>
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public void Add(YamlNode child)
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{
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children.Add(child);
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}
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/// <summary>
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/// Adds a scalar node to the <see cref="Children"/> collection.
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/// </summary>
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/// <param name="child">The child.</param>
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public void Add(string child)
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{
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children.Add(new YamlScalarNode(child));
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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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for (var i = 0; i < children.Count; ++i)
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{
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if (children[i] is YamlAliasNode)
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{
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children[i] = state.GetNode(children[i].Anchor!, children[i].Start, children[i].End);
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}
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}
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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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emitter.Emit(new SequenceStart(Anchor, Tag, Tag.IsEmpty, Style));
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foreach (var node in children)
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{
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node.Save(emitter, state);
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}
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emitter.Emit(new SequenceEnd());
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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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visitor.Visit(this);
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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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var other = obj as YamlSequenceNode;
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var areEqual = other != null
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&& Equals(Tag, other.Tag)
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&& children.Count == other.children.Count;
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if (!areEqual)
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{
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return false;
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}
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for (var i = 0; i < children.Count; ++i)
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{
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if (!Equals(children[i], other!.children[i]))
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{
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return false;
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}
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}
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return true;
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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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var hashCode = 0;
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foreach (var item in children)
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{
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hashCode = CombineHashCodes(hashCode, item);
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}
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hashCode = CombineHashCodes(hashCode, Tag);
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return hashCode;
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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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level.Increment();
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yield return this;
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foreach (var child in children)
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{
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foreach (var node in child.SafeAllNodes(level))
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{
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yield return node;
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}
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}
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level.Decrement();
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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.Sequence; }
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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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if (!level.TryIncrement())
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{
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return MaximumRecursionLevelReachedToStringValue;
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}
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var text = new StringBuilder("[ ");
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foreach (var child in children)
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{
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if (text.Length > 2)
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{
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text.Append(", ");
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}
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text.Append(child.ToString(level));
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}
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text.Append(" ]");
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level.Decrement();
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return text.ToString();
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}
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#region IEnumerable<YamlNode> Members
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/// <summary />
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public IEnumerator<YamlNode> GetEnumerator()
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{
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return Children.GetEnumerator();
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}
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#endregion
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#region IEnumerable Members
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System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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#endregion
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void IYamlConvertible.Read(IParser parser, Type expectedType, ObjectDeserializer nestedObjectDeserializer)
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{
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Load(parser, new DocumentLoadingState());
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}
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void IYamlConvertible.Write(IEmitter emitter, ObjectSerializer nestedObjectSerializer)
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{
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Emit(emitter, new EmitterState());
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}
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}
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}
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