Set default value in JAXB

Question

I have an xml file as following and when the filePath2 is null or empty I want the value of that to be of filePath1's value. Is there a way in which I can achieve this through JAXB.

<file filePath1="C:/filePath">
   <subFile name="Test">
      <filePath2></filePath2>   
   </subFile>
<file/>

I don't want to hardcode the default value. If the value for filePath2 is null or blank("") I want to set the filePath1 attribute as the value of 'String filePath'. Is there a way to do it via a setter in JAXB?

Answer 1

Using plain Oracle JAXB I only see the possibility to implement that using an javax.xml.bind.Unmarshaller.Listener. Implement that interface in your model class and perform the necessary checks in the afterUnmarshal(..) method.

There you can access the value of filePath1 and set (if necessary) it to filePath2.