48 lines
1.5 KiB
C#
48 lines
1.5 KiB
C#
using System;
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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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using Myriad.Utils;
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namespace Myriad.Serialization
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{
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public class OptionalConverterFactory: JsonConverterFactory
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{
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public class Inner<T>: JsonConverter<Optional<T>>
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{
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public override Optional<T> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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var inner = JsonSerializer.Deserialize<T>(ref reader, options);
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return new(inner!);
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}
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public override void Write(Utf8JsonWriter writer, Optional<T> value, JsonSerializerOptions options)
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{
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JsonSerializer.Serialize(writer, value.HasValue ? value.GetValue() : default, typeof(T), options);
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}
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}
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public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options)
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{
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var innerType = typeToConvert.GetGenericArguments()[0];
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return (JsonConverter?) Activator.CreateInstance(
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typeof(Inner<>).MakeGenericType(innerType),
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BindingFlags.Instance | BindingFlags.Public,
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null,
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null,
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null);
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}
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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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return false;
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if (typeToConvert.GetGenericTypeDefinition() != typeof(Optional<>))
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return false;
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return true;
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}
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}
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} |