JsonEnumDataContract.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Runtime.Serialization.Json;
 
internal sealed class JsonEnumDataContract : JsonDataContract
{
    private sealed class JsonEnumDataContractCriticalHelper : JsonDataContractCriticalHelper
    {
        private readonly bool _isULong;
 
        public bool IsULong => _isULong;
 
        [RequiresUnreferencedCode("Data Contract Serialization and Deserialization might require types that cannot be statically analyzed. Make sure all of the required types are preserved.")]
        public JsonEnumDataContractCriticalHelper(EnumDataContract traditionalEnumDataContract)
            : base(traditionalEnumDataContract)
        {
            _isULong = traditionalEnumDataContract.IsULong;
        }
    }
 
    private readonly JsonEnumDataContractCriticalHelper _helper;
 
    public bool IsULong => _helper.IsULong;
 
    [RequiresUnreferencedCode("Data Contract Serialization and Deserialization might require types that cannot be statically analyzed. Make sure all of the required types are preserved.")]
    public JsonEnumDataContract(EnumDataContract traditionalDataContract)
        : base(new JsonEnumDataContractCriticalHelper(traditionalDataContract))
    {
        _helper = base.Helper as JsonEnumDataContractCriticalHelper;
    }
 
    [RequiresUnreferencedCode("Data Contract Serialization and Deserialization might require types that cannot be statically analyzed. Make sure all of the required types are preserved.")]
    public override object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
    {
        object obj = ((!IsULong) ? Enum.ToObject(base.TraditionalDataContract.UnderlyingType, jsonReader.ReadElementContentAsLong()) : Enum.ToObject(base.TraditionalDataContract.UnderlyingType, jsonReader.ReadElementContentAsUnsignedLong()));
        context?.AddNewObject(obj);
        return obj;
    }
 
    [RequiresUnreferencedCode("Data Contract Serialization and Deserialization might require types that cannot be statically analyzed. Make sure all of the required types are preserved.")]
    public override void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
    {
        if (IsULong)
        {
            jsonWriter.WriteUnsignedLong(Convert.ToUInt64(obj));
        }
        else
        {
            jsonWriter.WriteLong(Convert.ToInt64(obj));
        }
    }
}