This prototype explores generation of data classes for messaging between applications. It demonstrates

1. Use of dependency injection to autowire language specific code generators
2. Use of a templating library
3. Generation a hash for each message schema embedded in the generated code

Language specific code generators implement the ILanguageCodeGenerator interface. The constructor for CodeGenerator requires an enumerable of ILanguageCodeGenerator which Ninject populates with all implementations bound to the interface.

public CodeGenerator(IEnumerable<ILanguageCodeGenerator> languageCodeGenerators)

Binding is done using ninject.extensions.conventions.

kernel.Bind(x => x
    .FromThisAssembly()
    .SelectAllClasses()
    .BindAllInterfaces());

The Handlebars.net library is used for templating. Templates for generating C# code is found in directory CsTemplates.

namespace ToDo
{
    public class {{Name}}
    {
		public static readonly string Schema = "{{Schema}}";

		{{#each Properties}}
		public {{Type}} {{Name}} { get; set; }
		{{/each}}
    }
}

Message definitions from the Model namespace are decorated to add functionality specific to C# code generation. This is done by classes CsMessage and CsProperty.

The schema hash is calculated in the CsMessage decorator constructor.

var json = JsonConvert.SerializeObject(message);
var bytes = MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(json));
Schema = bytes.Select(b => b.ToString("X2")).Aggregate((s1, s2) => s1 + s2);

If a Message definition changes this will change the hash. If a Message includes a property of type Message and that type changes the hash of the parent will change.