Validating method parameters

Method.java

public class SomeBean {

	@Interceptors(ValidationInterceptor.class)
	public void addAuthor(@Size(min=5) String name, 
			String surename) {
		Author a = new Author();
		a.setName(name);
		a.setSurename(surename);

		em.persist(a);
	}

}

ValidationInterceptor.java

public class ValidationInterceptor {

        @Inject
        private ValidatorFactory validatorFactory;


	@AroundInvoke
	public Object validateMethodInvocation
		(InvocationContext ctx) throws Exception {

		MethodValidator validator = validatorFactory.getValidator()
			.unwrap(MethodValidator.class);

		Set<MethodConstraintViolation<Object>> violations = validator.validateAllParameters(
			ctx.getTarget(), 
			ctx.getMethod(), 
			ctx.getParameters());

	}

}