JsonPolymorphicGenerator

c# / .net Source Code Generator for System.Text.Json JsonDerivedType attributes on polymorphic classes

Usage

For this, your base classes need the partial and abstract key words, and be decorated with JsonPolymorphic, and there need to be derived types in that same assembly for this to work.

An example of this is:

[JsonPolymorphic]
public abstract partial class BaseClass
{
    public string Property1 { get; set; }
}

This will then generate a partial class, that is decorated with the JsonDerivedType attribute, and use the class name as the discriminator.

[JsonDerivedType(typeof(GoLive.JsonPolymorphicGenerator.Playground.InheritedClass1), "InheritedClass1")]
[JsonDerivedType(typeof(GoLive.JsonPolymorphicGenerator.Playground.InheritedClass2), "InheritedClass2")]
public partial class BaseClass
{
}

You can now transform the text of the attributes that gets spat out! You have a number of options, that gets added to an .editorconfig, such as:

root = true

[*.cs]
jsonpolymorphicgenerator.text_preappend = JSON_
jsonpolymorphicgenerator.text_transform = return classname.GetHashCode().ToString()
jsonpolymorphicgenerator.text_postappend = _A

For the jsonpolymorphicgenerator.text_transform option, you have to provide valid c# code, that returns a string - there are 2 input variables - classname and namespacename