java - 我可以覆盖 jsr-303 验证注释吗

Question

我有如下测试:

public class TestSizeAnnotation
{
    public static void main(String[] args)
    {
        System.out.println(Validation.buildDefaultValidatorFactory().getValidator().validate(new C()));
    }

    public static class P
    {
        private List<String> lst = newArrayList("AA");
        @Size(max=0, message="P")
        public List<String> getLst()
        {
            return lst;
        }

        public void setLst(List<String> lst)
        {
            this.lst = lst;
        }
    }

    public static class C extends P
    {
        @Override
        @Size(max=5, message="C")
        public List<String> getLst()
        {
            return super.getLst();
        }
    }
}

输出如下:
[ConstraintViolationImpl{interpolatedMessage='P', propertyPath=lst, rootBeanClass=class com....validator.TestSizeAnnotation$C, messageTemplate='P'}]

不过，我希望注解可以覆盖@Size，不会出现警告。
有没有办法做到这一点？

编辑:我找到了一个 bug似乎与此有关，但我运行 4.2.0 final 仍然得到上述行为。

Answer 1

JSR-303 实际上不支持覆盖验证注解。相反，子类中重写方法的注解将累积地应用:来自规范的第 3.3 节:

A constraint declaration can be placed on an interface. For a given class,constraint declarations held on super- classes as well as interfaces areevaluated by the Bean Validation provider. Rules are formally described inSection 3.4.5.The effect of constraint declarations is cumulative. Constraints declaredon a superclass getter will be validated along with any constraints definedon an overridden version of the getter according to the Java LanguageSpecification visibility rules.