是否可以在嵌套到ConstraintValidator
的@interface
定义中使用依赖项注入?
我创建了需要验证一些数据的自定义注释。CodebookValidator
只是一个普通的类:它没有用@Service
,@Component
进行注释。但是,即使我用@Service
进行注释,DI也不起作用...
关于如何在@Autowired
中使用ConstraintValidator
的任何想法?这是代码段:
@Documented
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = CodebookValue.CodebookValidator.class)
public @interface CodebookValue {
Codebook value();
String message() default "Not valid";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
class CodebookValidator implements ConstraintValidator<CodebookValue, String> {
@Autowired
private CodebookService codebookService; // this won't work it's null at runtime
private Codebook codebook;
@Override
public void initialize(CodebookValue constraintAnnotation) {
codebook = constraintAnnotation.value();
}
@Override
public boolean isValid(String value, ConstraintValidatorContext ctx) {
String translate = codebookService.translate(value, codebook, codebook.getSourceSystem());
return StringUtils.isEmpty(translate);
}
}
}
最佳答案
您可以为自己的Validator
bean提供Spring自动装配功能:
@Bean
public Validator validator(final AutowireCapableBeanFactory beanFactory) {
ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
.configure()
.constraintValidatorFactory(new SpringConstraintValidatorFactory(beanFactory))
.buildValidatorFactory();
return validatorFactory.getValidator();
}