Previous to the introduction of @Repeatable in Java 8, multiple of the same annotation on a field was not allowed. For XML Bean Validation, the way around this was to create a nested @List annotation inside of a Constraint annotation. For example, as explained in this post, nested inside of javax.validation.constraints.NotNull, you have:
@interface List {
NotNull[] value();
}
When using annotations directly in the java code (as is usually done), you can have multiple @NotNull annotations defined thusly:
@NotNull.List({@NotNull(groups=Foo.class, message="myObject may not be null for Foo"),
@NotNull(groups=Bar.class, message="myObject may not be null for Bar"})
private Object myObject;
However, I am trying to configure the validation in an xml file instead of in my code (which is less commonly done).
My xml bean validation looks like this:
<field name="myObject">
<constraint annotation="javax.validation.constraints.NotNull">
<message>myObject may not be null for Foo</message>
<groups>
<value>my.package.Foo</value>
</groups>
</constraint>
<constraint annotation="javax.validation.constraints.NotNull">
<message>myObject may not be null for Bar</message>
<groups>
<value>my.package.Bar</value>
</groups>
</constraint>
</field>
This isn't working for me... the validation simply doesn't happen when I do this.
I've looked for clues in the xsd: http://jboss.org/xml/ns/javax/validation/mapping/validation-mapping-1.0.xsd, but I'm not seeing a way to incorporate @NotNull.List.
What is the right way to use multiple of the same constraint in xml?
