Question

Does JPA contains any validation API?

E.g. email property validation like this in hibernate validation:

@Email
public String getUserEmail() {
  ...
}

Answer 1

Bean Validation (JSR303) can be used nicely alongside JPA, but is a separate API. This is a very brief introduction to Bean Validation itself, and see this for how an introduction of how it can be used with JPA.

Note: Similar to JPA, you will have to pick an implementation, of which there are many. Hibernate Validator is the reference implementation.