Automatic Validator for Couchbase AutoConfig

[ldoguin]

I would love to have automatic validation just by adding an annotation on an entity. As a developer I expect to write only 'significant' code.

If I have

@NotNull
private String someField

I expect it to be the only code I have to write to make sure this field will never be persisted as null.

Currently I have to add a validator bean like so:

@Bean
public Validator validator() {
    return new LocalValidatorFactoryBean();
}

I know it's not a lot to add, but from a devex perspective, I would find it easier to have it directly set in CouchbaseAutoconfiguration.

That being said I might not realize fully what having a validator declared implies other than making sure your annotation will be taken into account.

[philwebb]

Probably worth following the same pattern as ConfigurationPropertiesBindingPostProcessor

[snicoll]

We should probably improve ValidationAutoConfiguration (#6228 ) to expose a Validator then. Right now, we don't use any of the logic in ConfigurationPropertiesBindingPostProcessor