45 lines
1.5 KiB
C#
45 lines
1.5 KiB
C#
using System;
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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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/// Converts a nullable struct or value to/from JSON.
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/// Required - some clients send an empty string.
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/// </summary>
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/// <typeparam name="T">The struct type.</typeparam>
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public class JsonNullableStructConverter<T> : JsonConverter<T?>
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where T : struct
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{
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private readonly JsonConverter<T?> _baseJsonConverter;
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/// <summary>
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/// Initializes a new instance of the <see cref="JsonNullableStructConverter{T}"/> class.
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/// </summary>
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/// <param name="baseJsonConverter">The base json converter.</param>
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public JsonNullableStructConverter(JsonConverter<T?> baseJsonConverter)
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{
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_baseJsonConverter = baseJsonConverter;
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}
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/// <inheritdoc />
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public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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// Handle empty string.
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if (reader.TokenType == JsonTokenType.String && ((reader.HasValueSequence && reader.ValueSequence.IsEmpty) || reader.ValueSpan.IsEmpty))
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{
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return null;
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}
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return _baseJsonConverter.Read(ref reader, typeToConvert, options);
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}
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/// <inheritdoc />
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public override void Write(Utf8JsonWriter writer, T? value, JsonSerializerOptions options)
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{
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_baseJsonConverter.Write(writer, value, options);
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}
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}
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}
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