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60 lines
2.1 KiB
C#
60 lines
2.1 KiB
C#
#nullable enable
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using System;
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using System.Collections;
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using System.Globalization;
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using System.Reflection;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace MediaBrowser.Common.Json.Converters
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{
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/// <summary>
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/// https://github.com/dotnet/runtime/issues/30524#issuecomment-524619972.
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/// TODO This can be removed when System.Text.Json supports Dictionaries with non-string keys.
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/// </summary>
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internal sealed class JsonNonStringKeyDictionaryConverterFactory : JsonConverterFactory
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{
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/// <summary>
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/// Only convert objects that implement IDictionary and do not have string keys.
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/// </summary>
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/// <param name="typeToConvert">Type convert.</param>
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/// <returns>Conversion ability.</returns>
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public override bool CanConvert(Type typeToConvert)
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{
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if (!typeToConvert.IsGenericType)
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{
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return false;
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}
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// Let built in converter handle string keys
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if (typeToConvert.GenericTypeArguments[0] == typeof(string))
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{
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return false;
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}
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// Only support objects that implement IDictionary
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return typeToConvert.GetInterface(nameof(IDictionary)) != null;
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}
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/// <summary>
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/// Create converter for generic dictionary type.
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/// </summary>
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/// <param name="typeToConvert">Type to convert.</param>
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/// <param name="options">Json serializer options.</param>
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/// <returns>JsonConverter for given type.</returns>
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public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
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{
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var converterType = typeof(JsonNonStringKeyDictionaryConverter<,>)
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.MakeGenericType(typeToConvert.GenericTypeArguments[0], typeToConvert.GenericTypeArguments[1]);
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var converter = (JsonConverter)Activator.CreateInstance(
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converterType,
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BindingFlags.Instance | BindingFlags.Public,
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null,
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null,
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CultureInfo.CurrentCulture);
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return converter;
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}
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}
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}
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