92 lines
3.8 KiB
C#
92 lines
3.8 KiB
C#
// This file is part of YamlDotNet - A .NET library for YAML.
|
|
// Copyright (c) Antoine Aubry and contributors
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
// this software and associated documentation files (the "Software"), to deal in
|
|
// the Software without restriction, including without limitation the rights to
|
|
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
// of the Software, and to permit persons to whom the Software is furnished to do
|
|
// so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using YamlDotNet.Core;
|
|
using YamlDotNet.Core.Events;
|
|
|
|
namespace YamlDotNet.Serialization.BufferedDeserialization
|
|
{
|
|
/// <summary>
|
|
/// Wraps a <see cref="IParser"/> instance and allows it to be buffered as a LinkedList in memory and replayed.
|
|
/// </summary>
|
|
public class ParserBuffer : IParser
|
|
{
|
|
private readonly LinkedList<ParsingEvent> buffer;
|
|
|
|
private LinkedListNode<ParsingEvent>? current;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ParserBuffer"/> class.
|
|
/// </summary>
|
|
/// <param name="parserToBuffer">The Parser to buffer.</param>
|
|
/// <param name="maxDepth">The maximum depth of the parser to buffer before raising an ArgumentOutOfRangeException.</param>
|
|
/// <param name="maxLength">The maximum length of the LinkedList can buffer before raising an ArgumentOutOfRangeException.</param>
|
|
/// <exception cref="ArgumentOutOfRangeException">If parser does not fit within the max depth and length specified.</exception>
|
|
public ParserBuffer(IParser parserToBuffer, int maxDepth, int maxLength)
|
|
{
|
|
buffer = new LinkedList<ParsingEvent>();
|
|
buffer.AddLast(parserToBuffer.Consume<MappingStart>());
|
|
var depth = 0;
|
|
do
|
|
{
|
|
var next = parserToBuffer.Consume<ParsingEvent>();
|
|
depth += next.NestingIncrease;
|
|
buffer.AddLast(next);
|
|
|
|
if (maxDepth > -1 && depth > maxDepth)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(parserToBuffer), "Parser buffer exceeded max depth");
|
|
}
|
|
if (maxLength > -1 && buffer.Count > maxLength)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(parserToBuffer), "Parser buffer exceeded max length");
|
|
}
|
|
} while (depth >= 0);
|
|
|
|
current = buffer.First;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the current event. Returns null after <see cref="MoveNext" /> returns false.
|
|
/// </summary>
|
|
public ParsingEvent? Current => current?.Value;
|
|
|
|
/// <summary>
|
|
/// Moves to the next event.
|
|
/// </summary>
|
|
/// <returns>Returns true if there are more events available, otherwise returns false.</returns>
|
|
public bool MoveNext()
|
|
{
|
|
current = current?.Next;
|
|
return current != null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Resets the buffer back to it's first event.
|
|
/// </summary>
|
|
public void Reset()
|
|
{
|
|
current = buffer.First;
|
|
}
|
|
}
|
|
} |