PolymorphicJsonTypeInfoResolver 0.0.6

Polymorphic Json Type Info Resolver

Using polymorphism with the contract model available since .NET7+.

var resolver = new PolymorphicTypeInfoResolver()
    .Type<B>(x => x
        .Has<C>()
        .Has<D>("d"));
        
var json = JsonSerializer.Serialize(new A(new C("cheap")), new JsonSerializerOptions {
    TypeInfoResolver = resolver
});

{
    "Specification": {
        "$type":"C",
        "Remarks":"cheap"
    }
}

var data = JsonSerializer.Deserialize<A>(json, new JsonSerializerOptions {
    TypeInfoResolver = resolver
});

Api inspired by EF model inheritance.

new PolymorphicTypeInfoResolver()
    .Type<B>(x => x
        .Discriminator("$TYPE")
        .Has<C>()
        .Has<D>());

Opt-in for all derived types (from the same assemby):

new PolymorphicTypeInfoResolver()
    .Type<C>(x => x.AddAllDerived())
    .Type<D>(x => x.AddAllDerived(t => t.Name.ToLowerInvariant()));