There are two ways to register a
Validator
instance in Spring Data REST: wire it by bean name or register the validator manually. For the majority of cases,
the simple bean name prefix style will be sufficient.
In order to tell Spring Data REST you want a particular
Validator
assigned to a particular event, you simply prefix the bean name with the event you're interested in. For example, to
validate instances of the
Person
class before new ones are saved into the repository, you would declare an instance of a
Validator<Person>
in your
ApplicationContext
with the bean name "beforeCreatePersonValidator". Since the prefix "beforeCreate" matches a known Spring Data REST
event, that validator will be wired to the correct event.
If you would rather not use the bean name prefix approach, then you simply need to register an instance of
your validator with the bean who's job it is to invoke validators after the correct event. In your configuration
that subclasses Spring Data REST's
RepositoryRestMvcConfiguration, override the
configureValidatingRepositoryEventListener
method and call the
addValidator
method on the
ValidatingRepositoryEventListener, passing the event you want this validator
to be triggered on, and an instance of the validator.
@Override protected void configureValidatingRepositoryEventListener(ValidatingRepositoryEventListener v) { v.addValidator("beforeSave", new BeforeSaveValidator()); }