public override void Write(Utf8JsonWriter writer, Envelope message, JsonSerializerOptions options)
{
writer.WriteStartObject();
writer.WriteString(options.GetContentTypePropertyName(), message.ContentType);
writer.WritePropertyName(options.GetContentPropertyName());
JsonSerializer.Serialize(writer, message.GetContent(), options);
writer.WriteEndObject();
}
public override Envelope Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var contentTypePropertyName = options.GetContentTypePropertyName();
var contentPropertyName = options.GetContentPropertyName();
var propertyNameComparison = options.PropertyNameCaseInsensitive ? StringComparison.OrdinalIgnoreCase : default;
string?propertyName = null;
var contentType = default(Type);
var content = default(object);
do
{
switch (reader.TokenType)
{
case JsonTokenType.PropertyName:
propertyName = reader.GetString();
break;
case JsonTokenType.String:
if (contentTypePropertyName.Equals(propertyName, propertyNameComparison))
{
contentType = Type.GetType(JsonSerializer.Deserialize <string>(ref reader, options), true);
}
break;
case JsonTokenType.StartObject:
if (contentPropertyName.Equals(propertyName, propertyNameComparison))
{
content = JsonSerializer.Deserialize(ref reader, contentType, options);
}
break;
}
} while (reader.Read());
var envelopeType = typeof(Envelope <>).MakeGenericType(contentType);
return(Activator.CreateInstance(envelopeType, content) as Envelope ??
throw new InvalidOperationException($"Read did not produce an {nameof(Envelope)} object."));
}