112 lines
4.6 KiB
C#
112 lines
4.6 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;
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using System.Collections.Generic;
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using YamlDotNet.Core;
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using YamlDotNet.Core.Events;
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using YamlDotNet.Helpers;
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using YamlDotNet.Serialization.Utilities;
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namespace YamlDotNet.Serialization.NodeDeserializers
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{
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public sealed class CollectionNodeDeserializer : INodeDeserializer
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{
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private readonly IObjectFactory objectFactory;
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public CollectionNodeDeserializer(IObjectFactory objectFactory)
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{
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this.objectFactory = objectFactory ?? throw new ArgumentNullException(nameof(objectFactory));
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}
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bool INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func<IParser, Type, object?> nestedObjectDeserializer, out object? value)
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{
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IList? list;
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var canUpdate = true;
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Type itemType;
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var genericCollectionType = ReflectionUtility.GetImplementedGenericInterface(expectedType, typeof(ICollection<>));
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if (genericCollectionType != null)
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{
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var genericArguments = genericCollectionType.GetGenericArguments();
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itemType = genericArguments[0];
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value = objectFactory.Create(expectedType);
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list = value as IList;
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if (list == null)
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{
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// Uncommon case where a type implements IList<T> but not IList
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var genericListType = ReflectionUtility.GetImplementedGenericInterface(expectedType, typeof(IList<>));
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canUpdate = genericListType != null;
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list = (IList?)Activator.CreateInstance(typeof(GenericCollectionToNonGenericAdapter<>).MakeGenericType(itemType), value);
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}
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}
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else if (typeof(IList).IsAssignableFrom(expectedType))
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{
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itemType = typeof(object);
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value = objectFactory.Create(expectedType);
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list = (IList)value;
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}
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else
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{
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value = null;
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return false;
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}
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DeserializeHelper(itemType, parser, nestedObjectDeserializer, list!, canUpdate);
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return true;
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}
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internal static void DeserializeHelper(Type tItem, IParser parser, Func<IParser, Type, object?> nestedObjectDeserializer, IList result, bool canUpdate)
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{
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parser.Consume<SequenceStart>();
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while (!parser.TryConsume<SequenceEnd>(out var _))
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{
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var current = parser.Current;
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var value = nestedObjectDeserializer(parser, tItem);
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if (value is IValuePromise promise)
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{
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if (canUpdate)
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{
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var index = result.Add(tItem.IsValueType() ? Activator.CreateInstance(tItem) : null);
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promise.ValueAvailable += v => result[index] = TypeConverter.ChangeType(v, tItem);
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}
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else
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{
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throw new ForwardAnchorNotSupportedException(
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current?.Start ?? Mark.Empty,
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current?.End ?? Mark.Empty,
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"Forward alias references are not allowed because this type does not implement IList<>"
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);
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}
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}
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else
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{
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result.Add(TypeConverter.ChangeType(value, tItem));
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}
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}
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}
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}
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}
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