javax.validation API

[vojkny]

Spring MVC supports javax.validation annotations @Size, @Pattern which allows:

1. Validate input fields on data classes (and respond with 400 in case of invalid payloads)
2. Generate OpenApi/swagger docs, eg.:
   

These can be used on data classes as follows:

   data class User(
        @get:Size(min = 0, max = 64)
        val name: String?,
        @get:Size(min = 0, max = 512)
        val bio: String?,
    )

It would be great if http4k could get use of these annotations for both reasons above.