[REQ] Is there a way to prevent user from being able to push body boolean attribut = null

Is your feature request related to a problem? Please describe.

I've described in my openApi that a boolean field is optional, and the default value is false, because most ppl do not need to care about this argument.
I've defined a default value, and it worked great until a customer sent an explicit null value.

Can I do anything so that the request with null value will be either rejected or the default value will be injected with default value ?
I'm using java code behind and would like to avoid having to do manual boolean check on everything, any chance to generate primitve boolean otherwise ?

Also, can I do anything to prevent null objects in array attribut, without having to check manual in my code ?
Either by removing null value, or throwing an error when user try to push a null item in an array ?

For both I've tried to use openApi "nullable: false" but doesnt seems help.

Describe the solution you'd like

Allow to use primitive boolean for some boolean flag, or take into account nullable: false by injecting default value or throwing a validation exception

Describe alternatives you've considered

No files, tests, or entry points are named. Start by examining how OpenAPI nullable and default values are handled for generated Java booleans and array items; done would mean an agreed behavior for rejecting nulls or applying defaults without manual checks.