245 lines
10 KiB
C#
245 lines
10 KiB
C#
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#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.Reflection;
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using Newtonsoft.Json.Utilities;
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using System.Collections;
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#if !HAVE_LINQ
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using Newtonsoft.Json.Utilities.LinqBridge;
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#endif
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namespace 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 JsonDictionaryContract : JsonContainerContract
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{
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/// <summary>
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/// Gets or sets the dictionary key resolver.
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/// </summary>
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/// <value>The dictionary key resolver.</value>
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public Func<string, string> DictionaryKeyResolver { get; set; }
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/// <summary>
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/// Gets the <see cref="System.Type"/> of the dictionary keys.
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/// </summary>
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/// <value>The <see cref="System.Type"/> of the dictionary keys.</value>
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public Type DictionaryKeyType { get; }
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/// <summary>
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/// Gets the <see cref="System.Type"/> of the dictionary values.
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/// </summary>
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/// <value>The <see cref="System.Type"/> of the dictionary values.</value>
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public Type DictionaryValueType { get; }
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internal JsonContract KeyContract { get; set; }
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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> _genericTemporaryDictionaryCreator;
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internal bool ShouldCreateWrapper { get; }
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private readonly ConstructorInfo _parameterizedConstructor;
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private ObjectConstructor<object> _overrideCreator;
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private ObjectConstructor<object> _parameterizedCreator;
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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)
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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 => _overrideCreator = value;
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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 dictionary values.
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/// </summary>
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/// <value><c>true</c> if the creator has a parameter with the dictionary 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="JsonDictionaryContract"/> 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 JsonDictionaryContract(Type underlyingType)
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: base(underlyingType)
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{
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ContractType = JsonContractType.Dictionary;
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Type keyType;
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Type valueType;
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if (ReflectionUtils.ImplementsGenericDefinition(underlyingType, typeof(IDictionary<,>), out _genericCollectionDefinitionType))
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{
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keyType = _genericCollectionDefinitionType.GetGenericArguments()[0];
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valueType = _genericCollectionDefinitionType.GetGenericArguments()[1];
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if (ReflectionUtils.IsGenericDefinition(UnderlyingType, typeof(IDictionary<,>)))
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{
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CreatedType = typeof(Dictionary<,>).MakeGenericType(keyType, valueType);
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}
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else if (underlyingType.IsGenericType())
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{
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// ConcurrentDictionary<,> + IDictionary setter + null value = error
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// wrap to use generic setter
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// https://github.com/JamesNK/Newtonsoft.Json/issues/1582
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Type typeDefinition = underlyingType.GetGenericTypeDefinition();
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if (typeDefinition.FullName == JsonTypeReflector.ConcurrentDictionaryTypeName)
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{
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ShouldCreateWrapper = true;
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}
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}
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#if HAVE_READ_ONLY_COLLECTIONS
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IsReadOnlyOrFixedSize = ReflectionUtils.InheritsGenericDefinition(underlyingType, typeof(ReadOnlyDictionary<,>));
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#endif
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}
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#if HAVE_READ_ONLY_COLLECTIONS
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else if (ReflectionUtils.ImplementsGenericDefinition(underlyingType, typeof(IReadOnlyDictionary<,>), out _genericCollectionDefinitionType))
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{
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keyType = _genericCollectionDefinitionType.GetGenericArguments()[0];
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valueType = _genericCollectionDefinitionType.GetGenericArguments()[1];
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if (ReflectionUtils.IsGenericDefinition(UnderlyingType, typeof(IReadOnlyDictionary<,>)))
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{
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CreatedType = typeof(ReadOnlyDictionary<,>).MakeGenericType(keyType, valueType);
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}
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IsReadOnlyOrFixedSize = true;
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}
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#endif
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else
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{
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ReflectionUtils.GetDictionaryKeyValueTypes(UnderlyingType, out keyType, out valueType);
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if (UnderlyingType == typeof(IDictionary))
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{
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CreatedType = typeof(Dictionary<object, object>);
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}
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}
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if (keyType != null && valueType != null)
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{
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_parameterizedConstructor = CollectionUtils.ResolveEnumerableCollectionConstructor(
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CreatedType,
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typeof(KeyValuePair<,>).MakeGenericType(keyType, valueType),
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typeof(IDictionary<,>).MakeGenericType(keyType, valueType));
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#if HAVE_FSHARP_TYPES
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if (!HasParameterizedCreatorInternal && underlyingType.Name == FSharpUtils.FSharpMapTypeName)
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{
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FSharpUtils.EnsureInitialized(underlyingType.Assembly());
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_parameterizedCreator = FSharpUtils.CreateMap(keyType, valueType);
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}
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#endif
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}
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if (!typeof(IDictionary).IsAssignableFrom(CreatedType))
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{
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ShouldCreateWrapper = true;
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}
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DictionaryKeyType = keyType;
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DictionaryValueType = valueType;
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#if (NET20 || NET35)
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if (DictionaryValueType != null && ReflectionUtils.IsNullableType(DictionaryValueType))
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{
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// bug in .NET 2.0 & 3.5 that Dictionary<TKey, Nullable<TValue>> throws an error when adding null via IDictionary[key] = object
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// wrapper will handle calling Add(T) instead
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if (ReflectionUtils.InheritsGenericDefinition(CreatedType, typeof(Dictionary<,>), out _))
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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 (ImmutableCollectionsUtils.TryBuildImmutableForDictionaryContract(
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underlyingType,
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DictionaryKeyType,
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DictionaryValueType,
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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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}
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}
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internal IWrappedDictionary CreateWrapper(object dictionary)
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{
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if (_genericWrapperCreator == null)
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{
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_genericWrapperType = typeof(DictionaryWrapper<,>).MakeGenericType(DictionaryKeyType, DictionaryValueType);
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ConstructorInfo genericWrapperConstructor = _genericWrapperType.GetConstructor(new[] { _genericCollectionDefinitionType });
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_genericWrapperCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(genericWrapperConstructor);
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}
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return (IWrappedDictionary)_genericWrapperCreator(dictionary);
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}
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internal IDictionary CreateTemporaryDictionary()
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{
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if (_genericTemporaryDictionaryCreator == null)
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{
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Type temporaryDictionaryType = typeof(Dictionary<,>).MakeGenericType(DictionaryKeyType ?? typeof(object), DictionaryValueType ?? typeof(object));
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_genericTemporaryDictionaryCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateDefaultConstructor<object>(temporaryDictionaryType);
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}
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return (IDictionary)_genericTemporaryDictionaryCreator();
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}
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}
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}
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