Dependency Injection in JSR-303 Constraint Validator with Spring fails

Question

I have the same problem as here and here but couldn\'t find a solution yet.

So my sample test project will show the whole relevant configuration and code:

Co

Answer 1

I have fought the same problem in Spring Boot environment and I found out that Hibernate internal implementation got in instead of the configured Spring's one. When the application started, debugger caught a line with the Spring's factory but later in runtime there was Hibernate's one. After some debugging, I came to the conclusion that MethodValidationPostProcessor got the internal one. Therefore I configured it as follows:

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

@Bean
public MethodValidationPostProcessor methodValidationPostProcessor(Validator validator) {
    MethodValidationPostProcessor methodValidationPostProcessor = new MethodValidationPostProcessor();
    methodValidationPostProcessor.setValidator(validator);
    return methodValidationPostProcessor;
}

Note the setter for validator - it did the job.

Answer 2

This is what worked for me. I had to used the @Inject tag.

    public class FooValidator implements ConstraintValidator<FooValid, Integer> {
        private ValidationService validationService;
        @Inject
        public FooValidator(ValidationService validationService){
            this.validationService = validationService;
        }
        @Override
        public void initialize(final FooValid constraintAnnotation) {
            // TODO Auto-generated method stub
        }
        @Override
        public boolean isValid(final Integer value, final ConstraintValidatorContext context) {
            // this.validationService is always NULL!
            Assert.notNull(this.validationService, "the validationService must not be null");
            return false;
        }

}

Answer 3

I had the same issue. The problem is arises because Hibernate is finding and applying the validators instead of Spring. So you need to set validation mode to NONE when configuring Hibernate:

@Bean(name="entityManagerFactory")
public LocalContainerEntityManagerFactoryBean
    localContainerEntityManagerFactoryBean(DataSource dataSource) {
    LocalContainerEntityManagerFactoryBean lcemfb =
        new LocalContainerEntityManagerFactoryBean();
    lcemfb.setDataSource(dataSource);
    lcemfb.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
    lcemfb.setValidationMode(ValidationMode.NONE);
    // Continue configuration...

If you have confgured a LocalValidationFactoryBean Spring will pick up any validators annotated with @Component and autowire them.