我可以覆盖 jsr-303 验证注释吗 [英] can I override a jsr-303 validation annotation

问题描述

我有一个如下的测试:

公共类TestSizeAnnotation{public static void main(String[] args){System.out.println(Validation.buildDefaultValidatorFactory().getValidator().validate(new C()));}公共静态类 P{私人列表<字符串>lst = newArrayList("AA");@Size(max=0, message="P")公共列表<字符串>获取Lst(){返回列表；}public void setLst(List lst){this.lst = lst;}}公共静态类 C 扩展 P{@覆盖@Size(max=5, message="C")公共列表<字符串>获取Lst(){返回 super.getLst();}}}

具有以下输出:
[ConstraintViolationImpl{interpolatedMessage='P', propertyPath=lst, rootBeanClass=class com....validator.TestSizeAnnotation$C, messageTemplate='P'}]

但是，我希望注释可以被 @Size 覆盖，并且不会出现警告.
有没有办法做到这一点?

我发现一个 bug 似乎与此有关，但我运行的是 4.2.0 final 仍然得到上述行为.

解决方案

JSR-303 实际上不支持覆盖验证注释.相反，子类中重写方法的注释将累积应用:来自规范的第 3.3 节:

<前>约束声明可以放在接口上.对于给定的类，超类和接口上的约束声明是由 Bean 验证提供程序评估.规则在第 3.4.5 节.约束声明的效果是累积的.约束声明将与定义的任何约束一起验证超类 getter根据 Java 语言在 getter 的覆盖版本上规范可见性规则.

I have a test like below:

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();
        }
    }
}

with the following output:
[ConstraintViolationImpl{interpolatedMessage='P', propertyPath=lst, rootBeanClass=class com....validator.TestSizeAnnotation$C, messageTemplate='P'}]

However, I expected that the annotation can @Size be overridden, and no warning will appear.
Is there a way to accomplish that?

EDIT: I found a bug seems related to that, but I run 4.2.0 final and still get the above behavior.

解决方案

Overriding validation annotations is actually not supported for JSR-303. Instead annotations on overridden methods in the subclass will be applied cumulatively: From section 3.3 of the specification:

A constraint declaration can be placed on an interface. For a given class,
constraint declarations held on super- classes as well as interfaces are
evaluated by the Bean Validation provider. Rules are formally described in
Section 3.4.5.

The effect of constraint declarations is cumulative. Constraints declared
on a superclass getter will be validated along with any constraints defined
on an overridden version of the getter according to the Java Language
Specification visibility rules.

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