cs-notebook/note/json-converter.dib

#!meta

{"kernelInfo":{"defaultKernelName":"csharp","items":[{"aliases":[],"name":"csharp"}]}}

#!csharp

#!value --from-file ../data/json/test01.json --name JsonData

#!csharp

class ADT {
    public string Value { get; set; }
    public string Action { get; set; }
}

#!csharp

using System.Text.Json;
using System.Text.Json.Serialization;

class ADTJsonConverter : JsonConverter<ADT> {
    public override ADT Read(ref Utf8JsonReader reader, Type type, JsonSerializerOptions options) {
        if (reader.TokenType != JsonTokenType.StartObject) {
            throw new JsonException();
        }

        ADT result = new ADT();

        while (reader.Read()) {
            if (reader.TokenType == JsonTokenType.EndObject) {
                return result;
            }

            if (reader.TokenType != JsonTokenType.PropertyName) {
                throw new JsonException();
            }

            string PropertyName = reader.GetString();

            switch (PropertyName) {
                case "action":
                    if (reader.Read()) {
                        result.Action = reader.GetString();
                    }
                break;
                case "message":
                    if (reader.Read()) {
                        result.Value = reader.GetString();
                    }
                break;
            }
        }

        return null;
    }

    public override void Write(Utf8JsonWriter writer, ADT value, JsonSerializerOptions options) {
        writer.WriteStartObject();
    
        writer.WritePropertyName("action");
        writer.WriteStringValue(value.Action);

        writer.WritePropertyName("message");
        writer.WriteStringValue(value.Value);

        writer.WriteEndObject();
    }
}

#!csharp

using System.Text.Json;
using System.Text.Json.Serialization;
using System.Text.RegularExpressions;

class RuleJsonConverter : JsonConverter<Dictionary<int, ADT>> {
    public override Dictionary<int, ADT> Read(ref Utf8JsonReader reader, Type type, JsonSerializerOptions options) {
        if (reader.TokenType != JsonTokenType.StartObject) {
            throw new JsonException();
        }

        var converter = (JsonConverter<ADT>)options.GetConverter(typeof(ADT));
        Dictionary<int, ADT> dictionary = new Dictionary<int, ADT>();
        Regex regex = new Regex(@"S(?<stream>\d{1,3})F(?<function>\d{1,3})");
        while (reader.Read()) {
            if (reader.TokenType == JsonTokenType.EndObject) {
                return dictionary;
            }

            if (reader.TokenType != JsonTokenType.PropertyName) {
                throw new JsonException();
            }

            string PropertyName = reader.GetString();
            Match match = regex.Match(PropertyName);
            int stream = int.Parse(match.Groups["stream"].ToString());
            int function = int.Parse(match.Groups["function"].ToString());
            if (0 > stream || stream > 256 || 0 > function || function > 256) {
                throw new JsonException();
            }
			int key = (stream << 8) | (function);
            
			if (reader.Read()) {
				ADT value = converter.Read(ref reader, typeof(ADT), options);
				if (dictionary.TryAdd(key, value) == false) {
					dictionary[key] = value;
				}
			}
        }

        return null;
    }

    public override void Write(Utf8JsonWriter writer, Dictionary<int, ADT> dictionary, JsonSerializerOptions options) {
        writer.WriteStartObject();
        
        var converter = (JsonConverter<ADT>)options.GetConverter(typeof(ADT));
        foreach ((int key, ADT value) in dictionary)
        {
            string propertyName = $"S{(key >> 8) & 0xff}F{key & 0xff}";
            writer.WritePropertyName(propertyName);
            converter.Write(writer, value, options);
        }

        writer.WriteEndObject();
    }
}

#!csharp

#!share JsonData --from value --as jsonData
using System.Text.Json;
using System.Text.Json.Nodes;

var jsonSerializeOptions = new JsonSerializerOptions
{
    WriteIndented = true,
    Converters =
    {
        new RuleJsonConverter(),
        new ADTJsonConverter(),
    }
};

var nodes = JsonNode.Parse(jsonData);

var enableNode = nodes["enable"];
var ruleNode = nodes["rule"];

bool enableValue = enableNode.GetValue<bool>();
Dictionary<int, ADT> ruleValue = JsonSerializer.Deserialize<Dictionary<int, ADT>>(ruleNode.ToJsonString(), jsonSerializeOptions);

enableValue.Display();
ruleValue.Display();