csharp-sdk-upm/Libs/Newtonsoft.Json.AOT/Serialization/JsonDictionaryContract.cs

247 lines
10 KiB
C#
Raw Normal View History

2021-03-31 11:22:02 +08:00
#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Reflection;
using LC.Newtonsoft.Json.Utilities;
using System.Collections;
#if !HAVE_LINQ
using LC.Newtonsoft.Json.Utilities.LinqBridge;
#endif
namespace LC.Newtonsoft.Json.Serialization
{
/// <summary>
/// Contract details for a <see cref="System.Type"/> used by the <see cref="JsonSerializer"/>.
/// </summary>
public class JsonDictionaryContract : JsonContainerContract
{
/// <summary>
/// Gets or sets the dictionary key resolver.
/// </summary>
/// <value>The dictionary key resolver.</value>
public Func<string, string>? DictionaryKeyResolver { get; set; }
/// <summary>
/// Gets the <see cref="System.Type"/> of the dictionary keys.
/// </summary>
/// <value>The <see cref="System.Type"/> of the dictionary keys.</value>
public Type? DictionaryKeyType { get; }
/// <summary>
/// Gets the <see cref="System.Type"/> of the dictionary values.
/// </summary>
/// <value>The <see cref="System.Type"/> of the dictionary values.</value>
public Type? DictionaryValueType { get; }
internal JsonContract? KeyContract { get; set; }
private readonly Type? _genericCollectionDefinitionType;
private Type? _genericWrapperType;
private ObjectConstructor<object>? _genericWrapperCreator;
private Func<object>? _genericTemporaryDictionaryCreator;
internal bool ShouldCreateWrapper { get; }
private readonly ConstructorInfo? _parameterizedConstructor;
private ObjectConstructor<object>? _overrideCreator;
private ObjectConstructor<object>? _parameterizedCreator;
internal ObjectConstructor<object>? ParameterizedCreator
{
get
{
if (_parameterizedCreator == null && _parameterizedConstructor != null)
{
_parameterizedCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(_parameterizedConstructor);
}
return _parameterizedCreator;
}
}
/// <summary>
/// Gets or sets the function used to create the object. When set this function will override <see cref="JsonContract.DefaultCreator"/>.
/// </summary>
/// <value>The function used to create the object.</value>
public ObjectConstructor<object>? OverrideCreator
{
get => _overrideCreator;
set => _overrideCreator = value;
}
/// <summary>
/// Gets a value indicating whether the creator has a parameter with the dictionary values.
/// </summary>
/// <value><c>true</c> if the creator has a parameter with the dictionary values; otherwise, <c>false</c>.</value>
public bool HasParameterizedCreator { get; set; }
internal bool HasParameterizedCreatorInternal => (HasParameterizedCreator || _parameterizedCreator != null || _parameterizedConstructor != null);
/// <summary>
/// Initializes a new instance of the <see cref="JsonDictionaryContract"/> class.
/// </summary>
/// <param name="underlyingType">The underlying type for the contract.</param>
public JsonDictionaryContract(Type underlyingType)
: base(underlyingType)
{
ContractType = JsonContractType.Dictionary;
Type? keyType;
Type? valueType;
if (ReflectionUtils.ImplementsGenericDefinition(NonNullableUnderlyingType, typeof(IDictionary<,>), out _genericCollectionDefinitionType))
{
keyType = _genericCollectionDefinitionType.GetGenericArguments()[0];
valueType = _genericCollectionDefinitionType.GetGenericArguments()[1];
if (ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(IDictionary<,>)))
{
CreatedType = typeof(Dictionary<,>).MakeGenericType(keyType, valueType);
}
else if (NonNullableUnderlyingType.IsGenericType())
{
// ConcurrentDictionary<,> + IDictionary setter + null value = error
// wrap to use generic setter
// https://github.com/JamesNK/Newtonsoft.Json/issues/1582
Type typeDefinition = NonNullableUnderlyingType.GetGenericTypeDefinition();
if (typeDefinition.FullName == JsonTypeReflector.ConcurrentDictionaryTypeName)
{
ShouldCreateWrapper = true;
}
}
#if HAVE_READ_ONLY_COLLECTIONS
IsReadOnlyOrFixedSize = ReflectionUtils.InheritsGenericDefinition(NonNullableUnderlyingType, typeof(ReadOnlyDictionary<,>));
#endif
}
#if HAVE_READ_ONLY_COLLECTIONS
else if (ReflectionUtils.ImplementsGenericDefinition(NonNullableUnderlyingType, typeof(IReadOnlyDictionary<,>), out _genericCollectionDefinitionType))
{
keyType = _genericCollectionDefinitionType.GetGenericArguments()[0];
valueType = _genericCollectionDefinitionType.GetGenericArguments()[1];
if (ReflectionUtils.IsGenericDefinition(NonNullableUnderlyingType, typeof(IReadOnlyDictionary<,>)))
{
CreatedType = typeof(ReadOnlyDictionary<,>).MakeGenericType(keyType, valueType);
}
IsReadOnlyOrFixedSize = true;
}
#endif
else
{
ReflectionUtils.GetDictionaryKeyValueTypes(NonNullableUnderlyingType, out keyType, out valueType);
if (NonNullableUnderlyingType == typeof(IDictionary))
{
CreatedType = typeof(Dictionary<object, object>);
}
}
if (keyType != null && valueType != null)
{
_parameterizedConstructor = CollectionUtils.ResolveEnumerableCollectionConstructor(
CreatedType,
typeof(KeyValuePair<,>).MakeGenericType(keyType, valueType),
typeof(IDictionary<,>).MakeGenericType(keyType, valueType));
#if HAVE_FSHARP_TYPES
if (!HasParameterizedCreatorInternal && NonNullableUnderlyingType.Name == FSharpUtils.FSharpMapTypeName)
{
FSharpUtils.EnsureInitialized(NonNullableUnderlyingType.Assembly());
_parameterizedCreator = FSharpUtils.Instance.CreateMap(keyType, valueType);
}
#endif
}
if (!typeof(IDictionary).IsAssignableFrom(CreatedType))
{
ShouldCreateWrapper = true;
}
DictionaryKeyType = keyType;
DictionaryValueType = valueType;
#if (NET20 || NET35)
if (DictionaryValueType != null && ReflectionUtils.IsNullableType(DictionaryValueType))
{
// bug in .NET 2.0 & 3.5 that Dictionary<TKey, Nullable<TValue>> throws an error when adding null via IDictionary[key] = object
// wrapper will handle calling Add(T) instead
if (ReflectionUtils.InheritsGenericDefinition(CreatedType, typeof(Dictionary<,>), out _))
{
ShouldCreateWrapper = true;
}
}
#endif
if (DictionaryKeyType != null &&
DictionaryValueType != null &&
ImmutableCollectionsUtils.TryBuildImmutableForDictionaryContract(
NonNullableUnderlyingType,
DictionaryKeyType,
DictionaryValueType,
out Type? immutableCreatedType,
out ObjectConstructor<object>? immutableParameterizedCreator))
{
CreatedType = immutableCreatedType;
_parameterizedCreator = immutableParameterizedCreator;
IsReadOnlyOrFixedSize = true;
}
}
internal IWrappedDictionary CreateWrapper(object dictionary)
{
if (_genericWrapperCreator == null)
{
_genericWrapperType = typeof(DictionaryWrapper<,>).MakeGenericType(DictionaryKeyType, DictionaryValueType);
ConstructorInfo genericWrapperConstructor = _genericWrapperType.GetConstructor(new[] { _genericCollectionDefinitionType! });
_genericWrapperCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(genericWrapperConstructor);
}
return (IWrappedDictionary)_genericWrapperCreator(dictionary);
}
internal IDictionary CreateTemporaryDictionary()
{
if (_genericTemporaryDictionaryCreator == null)
{
Type temporaryDictionaryType = typeof(Dictionary<,>).MakeGenericType(DictionaryKeyType ?? typeof(object), DictionaryValueType ?? typeof(object));
_genericTemporaryDictionaryCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateDefaultConstructor<object>(temporaryDictionaryType);
}
return (IDictionary)_genericTemporaryDictionaryCreator();
}
}
}