I'm seeing some rather strange behavior in JiBX with regards to abstract
mappings, post-set and its ilk, and the '<structure map-as="foo"/>'
construct. The oddness isn't described in the docs, so I figure I'll check
on the list to see if it's a bug or just a surprise. In short, post-set is
sometimes called, and sometimes not.. An example:
Class:
public class TestClass
{
public String one;
public String two;
public String three;
public void postSet()
{
three="three";
}
public static void main(String args[]) throws Exception
{
String testString = "<TestClass></TestClass>";
IBindingFactory factory = BindingDirectory.getFactory(TestClass.class);
IUnmarshallingContext c = factory.createUnmarshallingContext();
TestClass tc = (TestClass) c.unmarshalDocument(new
StringReader(testString));
System.out.println(tc.three);
}
}
Binding:
<binding >
<mapping class="TestClass" abstract="true" type-name="level-one" >
<value name="one" field="one" usage="optional"/>
</mapping>
<mapping class="TestClass" abstract="false" post-set="postSet"
name="TestClass">
<structure map-as="level-one"/>
<value name="two" field="two" usage="optional"/>
</mapping>
</binding>
In this case, the post-set method is called - the output will be "three".
That's good, I suppose... but... let's mix it up a little.
Remove the 'two' value element from the second mapping and run the example
again. Result? The postSet method is _not_ called, and 'three' remains
null.
Of course, we can always just move the post-set attribute up to the abstract
mapping, and it gets called, once again. Not that this helps, if my entire
reason for creating a concrete base mapping is to use a post-set that wouldn't
be used against the abstract class. Joy?
So.. it appears that the concrete mapping only calls its own post-set if
there's something other than a 'map-as' present for mapping?
I admit I'm not entirely sure just what's going on here. I can recognize
it, and I can see a(n ugly) way to work around it, but...Is this a bug, or
just something I should know to watch for?
--
The cake is a lie!
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