Spring MVC验证继承的类 [英] Spring MVC Validation of Inherited Classes
问题描述
我很难相信我是唯一想要这样做的人，但是我找不到任何帮助我克服障碍的参考.使用Spring MVC和基于注释的验证(我使用的是框架4.0和Java 1.7)，请考虑一个简单的类层次结构，如下所示:
I have a hard time believing I'm the only one who wants to do this, but I can't find any references to help me over my hurdle. Using Spring MVC and annotation-based validation (I'm using framework 4.0 and Java 1.7), consider a simple class hierarchy, as follows:
abstract class Foo {
@Size(max=10, message = "The name has to be 10 characters or less.")
private String name;
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
}
class Bar extends Foo {
}
class Bang extends Foo {
}
如果我在大于10个字符的Bar或Bang实例中放置 name ，则会收到我期望的验证错误.但是，让我们假设，我仍然希望Bar和Bang是从抽象基类Foo派生的，但是我希望子类的name属性具有不同的验证.
If I put a name in an instance of either Bar or Bang that's greater than 10 characters, I get the validation error I'm expecting. Let's suppose, though, that I still want Bar and Bang to be derived from the abstract base class Foo, but that I want the name attribute of the child classes to have different validations.
如何注释Bar和Bang，以使 Bar.name 的最大长度为12个字符，而 Bang.name 的最大长度为8个字符?
How do I annotate Bar and Bang so that Bar.name has a max length of, say, 12 characters while Bang.name has a max length of 8 characters?
非常感谢， 罗布
推荐答案
简短的答案是，在Bean验证中无法禁用超类中的约束. https://hibernate.atlassian.net/browse/BVAL-256 a>建议引入@OverrideConstraint或@IgnoreInheritedConstraint类型的注释.截至目前，这是不可能的.
The short answer is that it is not possible in Bean Validation to disable constraints in super classes. There is a feature request here https://hibernate.atlassian.net/browse/BVAL-256 suggesting the introduction of annotations of the type @OverrideConstraint or @IgnoreInheritedConstraint. As of now, it is not possible to do this though.
另请参见 http://lists.jboss.org/pipermail/beanvalidation-dev/2012-January/000128.html 和 https://hibernate .atlassian.net/browse/HV-548 .
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