Spring 不创建 ConstraintValidator

Question

Spring 不会创建实施 ConstraintValidator 的 class 的实例。即使我用 @Configuartion Spring 注释 RolesValidator 创建它的实例，但验证不起作用。

这是我的代码：

@Constraint(validatedBy = [RolesValidator::class])
@Target(AnnotationTarget.PROPERTY, AnnotationTarget.FIELD)
@Retention(AnnotationRetention.RUNTIME)
annotation class ValidateRoles(
    val message: String = "{com.app.authservice.validators.ValidateRoles.message}",
    val groups: Array<KClass<*>> = arrayOf(),
    val payload: Array<KClass<out Payload>> = arrayOf()
)

//------Validator------

class RolesValidator : ConstraintValidator<ValidateRoles, Collection<String>> {
    lateinit var allowedValues: List<String>

    override fun initialize(constraintAnnotation: ValidateRoles?) {
        allowedValues = RoleType.values().map { it.name }
    }

    override fun isValid(value: Collection<String>?, context: ConstraintValidatorContext?): Boolean {
        return allowedValues.containsAll(value!!)
    }
}

//------Usage------

class AccountUpdateRolesDTO {
    @NotNull
    @ValidateRoles
    var roles: Set<String> = emptySet()
}

//------Controller------

@PreAuthorize("hasAnyAuthority($_ADMIN)")
@Transactional
@PutMapping("/{accountId}/roles")
fun updateRoles(
    @RequestBody @Valid body: AccountUpdateRolesDTO,
    @PathVariable accountId: Long,
    jwt: JWTData
): ResponseEntity<Void> {
    return ResponseEntity(HttpStatus.OK)
}

@编辑https://jira.spring.io/browse/SPR-16701

Answer 1

Spring 似乎无法识别 Kotlin 中的注解。在我将注释转换为 Java 之后一切正常。

@Constraint(validatedBy = RolesValidator.class)
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD})
public @interface ValidateRoles {
    String message() default "{com.app.authservice.validators.ValidateRoles.message}";

    Class[] groups() default {};

    Class[] payload() default {};
}

Answer 2

如果您利用 annotation use-site targets，Kotlin 测试也会通过：

class KotlinBodyDTO {
    @field:NotNull
    @field:ValidateRolesKotlin
    var roles: Set<String> = emptySet()
}

Spring 不创建 ConstraintValidator

Spring does not create ConstraintValidator

java

spring

bean-validation

kotlin