326 lines
14 KiB
C#
326 lines
14 KiB
C#
#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Globalization;
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using System.Reflection;
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using LC.Newtonsoft.Json.Utilities;
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using System.Collections;
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using System.Diagnostics;
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#if !HAVE_LINQ
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using LC.Newtonsoft.Json.Utilities.LinqBridge;
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#else
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using System.Linq;
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#endif
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namespace LC.Newtonsoft.Json.Serialization
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{
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/// <summary>
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/// Contract details for a <see cref="System.Type"/> used by the <see cref="JsonSerializer"/>.
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/// </summary>
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public class JsonArrayContract : JsonContainerContract
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{
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/// <summary>
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/// Gets the <see cref="System.Type"/> of the collection items.
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/// </summary>
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/// <value>The <see cref="System.Type"/> of the collection items.</value>
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public Type? CollectionItemType { get; }
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/// <summary>
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/// Gets a value indicating whether the collection type is a multidimensional array.
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/// </summary>
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/// <value><c>true</c> if the collection type is a multidimensional array; otherwise, <c>false</c>.</value>
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public bool IsMultidimensionalArray { get; }
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private readonly Type? _genericCollectionDefinitionType;
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private Type? _genericWrapperType;
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private ObjectConstructor<object>? _genericWrapperCreator;
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private Func<object>? _genericTemporaryCollectionCreator;
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internal bool IsArray { get; }
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internal bool ShouldCreateWrapper { get; }
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internal bool CanDeserialize { get; private set; }
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private readonly ConstructorInfo? _parameterizedConstructor;
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private ObjectConstructor<object>? _parameterizedCreator;
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private ObjectConstructor<object>? _overrideCreator;
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internal ObjectConstructor<object>? ParameterizedCreator
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{
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get
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{
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if (_parameterizedCreator == null && _parameterizedConstructor != null)
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{
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_parameterizedCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(_parameterizedConstructor);
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}
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return _parameterizedCreator;
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}
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}
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/// <summary>
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/// Gets or sets the function used to create the object. When set this function will override <see cref="JsonContract.DefaultCreator"/>.
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/// </summary>
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/// <value>The function used to create the object.</value>
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public ObjectConstructor<object>? OverrideCreator
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{
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get => _overrideCreator;
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set
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{
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_overrideCreator = value;
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// hacky
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CanDeserialize = true;
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}
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}
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/// <summary>
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/// Gets a value indicating whether the creator has a parameter with the collection values.
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/// </summary>
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/// <value><c>true</c> if the creator has a parameter with the collection values; otherwise, <c>false</c>.</value>
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public bool HasParameterizedCreator { get; set; }
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internal bool HasParameterizedCreatorInternal => (HasParameterizedCreator || _parameterizedCreator != null || _parameterizedConstructor != null);
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/// <summary>
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/// Initializes a new instance of the <see cref="JsonArrayContract"/> class.
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/// </summary>
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/// <param name="underlyingType">The underlying type for the contract.</param>
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public JsonArrayContract(Type underlyingType)
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: base(underlyingType)
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{
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ContractType = JsonContractType.Array;
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// netcoreapp3.0 uses EmptyPartition for empty enumerable. Treat as an empty array.
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IsArray = CreatedType.IsArray ||
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(NonNullableUnderlyingType.IsGenericType() && NonNullableUnderlyingType.GetGenericTypeDefinition().FullName == "System.Linq.EmptyPartition`1");
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bool canDeserialize;
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Type? tempCollectionType;
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if (IsArray)
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{
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CollectionItemType = ReflectionUtils.GetCollectionItemType(UnderlyingType);
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IsReadOnlyOrFixedSize = true;
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_genericCollectionDefinitionType = typeof(List<>).MakeGenericType(CollectionItemType);
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canDeserialize = true;
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IsMultidimensionalArray = (CreatedType.IsArray && UnderlyingType.GetArrayRank() > 1);
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}
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else if (typeof(IList).IsAssignableFrom(NonNullableUnderlyingType))
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{
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if (ReflectionUtils.ImplementsGenericDefinition(NonNullableUnderlyingType, typeof(ICollection<>), out _genericCollectionDefinitionType))
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{
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CollectionItemType = _genericCollectionDefinitionType.GetGenericArguments()[0];
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}
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else
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{
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CollectionItemType = ReflectionUtils.GetCollectionItemType(NonNullableUnderlyingType);
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}
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if (NonNullableUnderlyingType == typeof(IList))
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{
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CreatedType = typeof(List<object>);
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}
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if (CollectionItemType != null)
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{
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_parameterizedConstructor = CollectionUtils.ResolveEnumerableCollectionConstructor(NonNullableUnderlyingType, CollectionItemType);
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}
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IsReadOnlyOrFixedSize = ReflectionUtils.InheritsGenericDefinition(NonNullableUnderlyingType, typeof(ReadOnlyCollection<>));
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canDeserialize = true;
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}
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else if (ReflectionUtils.ImplementsGenericDefinition(NonNullableUnderlyingType, typeof(ICollection<>), out _genericCollectionDefinitionType))
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{
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CollectionItemType = _genericCollectionDefinitionType.GetGenericArguments()[0];
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if (ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(ICollection<>))
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|| ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(IList<>)))
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{
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CreatedType = typeof(List<>).MakeGenericType(CollectionItemType);
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}
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#if HAVE_ISET
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if (ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(ISet<>)))
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{
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CreatedType = typeof(HashSet<>).MakeGenericType(CollectionItemType);
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}
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#endif
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_parameterizedConstructor = CollectionUtils.ResolveEnumerableCollectionConstructor(NonNullableUnderlyingType, CollectionItemType);
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canDeserialize = true;
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ShouldCreateWrapper = true;
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}
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#if HAVE_READ_ONLY_COLLECTIONS
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else if (ReflectionUtils.ImplementsGenericDefinition(NonNullableUnderlyingType, typeof(IReadOnlyCollection<>), out tempCollectionType))
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{
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CollectionItemType = tempCollectionType.GetGenericArguments()[0];
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if (ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(IReadOnlyCollection<>))
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|| ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(IReadOnlyList<>)))
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{
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CreatedType = typeof(ReadOnlyCollection<>).MakeGenericType(CollectionItemType);
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}
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_genericCollectionDefinitionType = typeof(List<>).MakeGenericType(CollectionItemType);
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_parameterizedConstructor = CollectionUtils.ResolveEnumerableCollectionConstructor(CreatedType, CollectionItemType);
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#if HAVE_FSHARP_TYPES
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StoreFSharpListCreatorIfNecessary(NonNullableUnderlyingType);
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#endif
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IsReadOnlyOrFixedSize = true;
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canDeserialize = HasParameterizedCreatorInternal;
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}
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#endif
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else if (ReflectionUtils.ImplementsGenericDefinition(NonNullableUnderlyingType, typeof(IEnumerable<>), out tempCollectionType))
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{
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CollectionItemType = tempCollectionType.GetGenericArguments()[0];
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if (ReflectionUtils.IsGenericDefinition(UnderlyingType, typeof(IEnumerable<>)))
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{
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CreatedType = typeof(List<>).MakeGenericType(CollectionItemType);
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}
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_parameterizedConstructor = CollectionUtils.ResolveEnumerableCollectionConstructor(NonNullableUnderlyingType, CollectionItemType);
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#if HAVE_FSHARP_TYPES
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StoreFSharpListCreatorIfNecessary(NonNullableUnderlyingType);
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#endif
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if (NonNullableUnderlyingType.IsGenericType() && NonNullableUnderlyingType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
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{
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_genericCollectionDefinitionType = tempCollectionType;
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IsReadOnlyOrFixedSize = false;
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ShouldCreateWrapper = false;
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canDeserialize = true;
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}
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else
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{
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_genericCollectionDefinitionType = typeof(List<>).MakeGenericType(CollectionItemType);
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IsReadOnlyOrFixedSize = true;
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ShouldCreateWrapper = true;
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canDeserialize = HasParameterizedCreatorInternal;
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}
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}
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else
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{
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// types that implement IEnumerable and nothing else
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canDeserialize = false;
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ShouldCreateWrapper = true;
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}
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CanDeserialize = canDeserialize;
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#if (NET20 || NET35)
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if (CollectionItemType != null && ReflectionUtils.IsNullableType(CollectionItemType))
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{
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// bug in .NET 2.0 & 3.5 that List<Nullable<T>> throws an error when adding null via IList.Add(object)
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// wrapper will handle calling Add(T) instead
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if (ReflectionUtils.InheritsGenericDefinition(CreatedType, typeof(List<>), out tempCollectionType)
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|| (IsArray && !IsMultidimensionalArray))
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{
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ShouldCreateWrapper = true;
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}
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}
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#endif
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if (CollectionItemType != null &&
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ImmutableCollectionsUtils.TryBuildImmutableForArrayContract(
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NonNullableUnderlyingType,
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CollectionItemType,
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out Type? immutableCreatedType,
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out ObjectConstructor<object>? immutableParameterizedCreator))
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{
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CreatedType = immutableCreatedType;
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_parameterizedCreator = immutableParameterizedCreator;
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IsReadOnlyOrFixedSize = true;
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CanDeserialize = true;
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}
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}
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internal IWrappedCollection CreateWrapper(object list)
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{
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if (_genericWrapperCreator == null)
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{
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MiscellaneousUtils.Assert(_genericCollectionDefinitionType != null);
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_genericWrapperType = typeof(CollectionWrapper<>).MakeGenericType(CollectionItemType);
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Type constructorArgument;
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if (ReflectionUtils.InheritsGenericDefinition(_genericCollectionDefinitionType, typeof(List<>))
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|| _genericCollectionDefinitionType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
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{
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constructorArgument = typeof(ICollection<>).MakeGenericType(CollectionItemType);
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}
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else
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{
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constructorArgument = _genericCollectionDefinitionType;
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}
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ConstructorInfo genericWrapperConstructor = _genericWrapperType.GetConstructor(new[] { constructorArgument });
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_genericWrapperCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(genericWrapperConstructor);
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}
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return (IWrappedCollection)_genericWrapperCreator(list);
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}
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internal IList CreateTemporaryCollection()
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{
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if (_genericTemporaryCollectionCreator == null)
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{
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// multidimensional array will also have array instances in it
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Type collectionItemType = (IsMultidimensionalArray || CollectionItemType == null)
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? typeof(object)
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: CollectionItemType;
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Type temporaryListType = typeof(List<>).MakeGenericType(collectionItemType);
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_genericTemporaryCollectionCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateDefaultConstructor<object>(temporaryListType);
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}
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return (IList)_genericTemporaryCollectionCreator();
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}
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#if HAVE_FSHARP_TYPES
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private void StoreFSharpListCreatorIfNecessary(Type underlyingType)
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{
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if (!HasParameterizedCreatorInternal && underlyingType.Name == FSharpUtils.FSharpListTypeName)
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{
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FSharpUtils.EnsureInitialized(underlyingType.Assembly());
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_parameterizedCreator = FSharpUtils.Instance.CreateSeq(CollectionItemType!);
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}
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}
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#endif
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}
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} |