OneCiel.System.Dynamics.JsonExtension 0.0.2

OneCiel.System.Dynamics.JsonExtension

JSON serialization and deserialization extensions for OneCiel.System.Dynamics. Provides seamless System.Text.Json integration with DynamicDictionary for .NET 8 and .NET 9, including automatic JsonElement type conversion via the JsonElementValueResolver.

Installation

dotnet add package OneCiel.System.Dynamics.JsonExtension

Requirements

• OneCiel.System.Dynamics (required dependency)
• .NET 8.0 or later
• .NET 9.0 or later

Features

• JSON String Conversion: Convert DynamicDictionary to/from JSON strings
• File Operations: Save and load JSON files asynchronously and synchronously
• Automatic Type Conversion: JsonElement values are automatically converted to appropriate .NET types via resolver
• JsonConverter Support: Use with System.Text.Json serializer options
• Nested Object Support: Seamlessly handles nested objects and arrays
• Flexible Formatting: Optional indented output for readability
• Comment Handling: Support for JSON comments and trailing commas when parsing
• Extensible Resolvers: Provides JsonElementValueResolver for custom JSON type handling

Quick Start

Modern Fluent API

JSON support is automatically initialized on first use. No manual setup required:

using OneCiel.System.Dynamics;

// Modern extension method - just call .ToDynamicDictionary() on any JSON string!
var dict = @"{ ""name"": ""John"" }".ToDynamicDictionary();
// JsonElementValueResolver is automatically registered

Fluent Extension Methods

This package provides intuitive string extension methods:

// Parse JSON object
var user = jsonString.ToDynamicDictionary();

// Parse JSON array
var users = jsonArrayString.ToDynamicArray();

JSON String Operations

using OneCiel.System.Dynamics;

// Create a DynamicDictionary
var dict = new DynamicDictionary
{
    { "name", "John Doe" },
    { "age", 30 },
    { "active", true }
};

// Convert to JSON string
string json = dict.ToJson();
// Output: {"name":"John Doe","age":30,"active":true}

// Parse from JSON string - Modern fluent API!
var parsed = json.ToDynamicDictionary();
string name = parsed.GetValue<string>("name"); // "John Doe"
int age = parsed.GetValue<int>("age"); // 30

File Operations

// Asynchronous save
await dict.ToJsonFileAsync("data.json");

// Asynchronous load
var loaded = await DynamicDictionaryJsonExtensions.FromJsonFileAsync("data.json");

// Synchronous operations
dict.ToJsonFile("sync.json");
var syncLoaded = DynamicDictionaryJsonExtensions.FromJsonFile("sync.json");

Nested Objects and Arrays

string json = @"
{
    ""user"": {
        ""id"": 1,
        ""name"": ""Alice"",
        ""email"": ""alice@example.com""
    },
    ""items"": [
        { ""id"": 1, ""title"": ""Item 1"" },
        { ""id"": 2, ""title"": ""Item 2"" }
    ]
}";

// Modern fluent API - beautifully simple!
var data = json.ToDynamicDictionary();

// Access nested properties
int userId = data.GetValue<int>("user.id"); // 1
string userName = data.GetValue<string>("user.name"); // "Alice"

// Access array elements
string firstItemTitle = data.GetValue<string>("items[0].title"); // "Item 1"
int secondItemId = data.GetValue<int>("items[1].id"); // 2

Using with System.Text.Json

using System.Text.Json;

// Configure JsonSerializerOptions with the converter
var options = new JsonSerializerOptions
{
    Converters = 
    { 
        new DynamicDictionaryJsonConverter()
    },
    WriteIndented = true,
    PropertyNamingPolicy = JsonNamingPolicy.CamelCase
};

// Serialize
var dict = new DynamicDictionary { { "message", "Hello" } };
string json = JsonSerializer.Serialize(dict, options);

// Deserialize (automatically uses JsonElementValueResolver)
var deserialized = JsonSerializer.Deserialize<DynamicDictionary>(json, options);

Pretty Printing

var dict = new DynamicDictionary
{
    { "user", new DynamicDictionary { { "name", "Bob" }, { "age", 25 } } },
    { "items", new List<object> { "a", "b", "c" } }
};

// Indented JSON (human readable)
string prettyJson = dict.ToJson(writeIndented: true);

// Compact JSON
string compactJson = dict.ToJson(writeIndented: false);

JSON Element Value Resolver

The JsonElementValueResolver is automatically registered and provides automatic conversion of JsonElement values:

Automatic Type Conversion

When JSON data is loaded, JsonElement values are automatically converted:

Dynamic Member Access with Conversion

// Modern fluent API with dynamic type
string json = @"{ ""name"": ""Test"", ""count"": 42 }";
dynamic data = json.ToDynamicDictionary();

// Values are automatically converted from JsonElement
string name = data.name; // "Test" (string)
int count = data.count; // 42 (int)

Resolver Details

The JsonElementValueResolver:

• Checks if a value is a JsonElement
• Automatically converts JsonElement to appropriate .NET types
• Recursively processes nested objects and arrays
• Preserves typed arrays (all DynamicDictionary array elements)
• Is thread-safe and global to all DynamicDictionary instances

API Reference

Extension Methods

String Conversion (Modern Fluent API)

// Parse JSON object - Extension method on string!
DynamicDictionary ToDynamicDictionary(this string json)
DynamicDictionary ToDynamicDictionary(this string json, JsonSerializerOptions options)

// Parse JSON array - Extension method on string!
DynamicDictionary[] ToDynamicArray(this string json)
DynamicDictionary[] ToDynamicArray(this string json, JsonSerializerOptions options)

// Convert to JSON string
string ToJson(this DynamicDictionary dictionary, bool writeIndented = true)
string ToJson(this DynamicDictionary dictionary, JsonSerializerOptions options)

File Operations

// Save to file asynchronously
static Task ToJsonFileAsync(this DynamicDictionary dictionary, string filePath, bool writeIndented = true)

// Save to file synchronously
static void ToJsonFile(this DynamicDictionary dictionary, string filePath, bool writeIndented = true)

// Load from file asynchronously
static Task<DynamicDictionary> FromJsonFileAsync(string filePath)

// Load from file synchronously
static DynamicDictionary FromJsonFile(string filePath)

// Initialize JSON support (called automatically)
static void InitializeJsonSupport()

JsonElementValueResolver

public class JsonElementValueResolver : IValueResolver
{
    public bool CanResolve(object value) // Returns true for JsonElement
    public object Resolve(object value) // Converts JsonElement to .NET type
}

JsonConverter Class

public class DynamicDictionaryJsonConverter : JsonConverter<DynamicDictionary>
{
    public override bool CanConvert(Type typeToConvert)
    public override DynamicDictionary Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    public override void Write(Utf8JsonWriter writer, DynamicDictionary value, JsonSerializerOptions options)
}

Supported JSON Types

Error Handling

All methods provide proper error handling:

try
{
    var dict = "invalid json".ToDynamicDictionary();
}
catch (InvalidOperationException ex)
{
    Console.WriteLine("JSON parsing failed: " + ex.Message);
}

try
{
    await dict.ToJsonFileAsync("/invalid/path/file.json");
}
catch (InvalidOperationException ex)
{
    Console.WriteLine("File write failed: " + ex.Message);
}

Advanced: Custom JSON Resolvers

You can also create custom value resolvers for special JSON handling:

public class CustomJsonResolver : IValueResolver
{
    public bool CanResolve(object value)
    {
        return value is MySpecialJsonType;
    }

    public object Resolve(object value)
    {
        var special = (MySpecialJsonType)value;
        // Custom transformation logic
        return TransformToDesiredType(special);
    }
}

// Register for use alongside JsonElementValueResolver
DynamicDictionary.RegisterValueResolver(new CustomJsonResolver());

License

MIT License