我可以覆盖 jsr-303 验证注释吗

Question

我有一个如下所示的测试：

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'}]

但是，我预计注释可以 < code>@Size 被覆盖，并且不会出现警告。
有办法实现吗？

编辑：我发现一个 bug 似乎与此相关，但我运行 4.2.0 Final并仍然得到上述行为。

Answer 1

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被累积应用：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 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.

Answer 2

您可以通过 xml 配置来验证注释配置的验证：

http://docs.jboss.org/hibernate/validator/4.2/reference/en-US/html_single/#validator-xmlconfiguration

在您的情况下，如果您在validation.xml 文件中为 getList() 方法声明不同的验证（或不验证），它将覆盖 @Size 注释。

Answer 3

只是为了记录，我找到了解决我的问题的方法：

public class TestSizeAnnotation
{
    public static void main(String[] args)
    {
        System.out.println("c " + 
                Validation.buildDefaultValidatorFactory().getValidator().validate(new C(), Default.class, SizeGroup2.class));
        System.out.println("p " + 
                Validation.buildDefaultValidatorFactory().getValidator().validate(new P(), Default.class, SizeGroup.class));
    }
    public static interface SizeGroup {}
    public static interface SizeGroup2 {}
    public static class P 
    {
        private List<String> lst = newArrayList("AA");
        @Size(max=0, message="P" , groups=SizeGroup.class)
        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", groups=SizeGroup2.class)
        public List<String> getLst()
        {
            return super.getLst();
        }

    }
}