I'm trying to use Jibx (beta3c-1.0) with hibernate (v3) and run into
problems when I want to use hibernate laziness.
The following happens:
- I have an Order.java class and its associated .hbm.xml
- I design the Jibx mapping for the order class and associated objects.
<mapping name="order" class="Order">
<value name="number" field="orderNbr" usage="optional"/>
<value name="creationDate" field="creationDate" usage="optional"/>
<structure name="paymentInfo" field="paymentInfo">
<value name="creditCardNbr" field="creditCardNbr"/>
</structure>
</mapping>
When I try to marshall an Order object ( instantiated from the database
), I get the following error:
"Unable to access binding information for class
Order$$EnhancerByCGLIB$$4c139633 Make sure the binding has been
compiled"
The error makes sense because the concrete class I'm getting is really
the subclass generated by hibernate to handle laziness. Of course I
never defined a binding for this class, but would it be possible to have
Jibx use the mapping for the declared class ?
So I turned of lazyness for my Order class ( I still have it for
PaymentInfo ), and now have the following:
java.lang.NullPointerException
at
org.jibx.runtime.impl.UTF8Escaper.writeAttribute(UTF8Escaper.java:67)
at
org.jibx.runtime.impl.GenericXMLWriter.writeAttributeText(GenericXMLWrit
er.java:200)
at
org.jibx.runtime.impl.XMLWriterBase.addAttribute(XMLWriterBase.java:338)
at
org.jibx.runtime.impl.MarshallingContext.attribute(MarshallingContext.ja
va:488)
at PaymentInfo.JiBX_marshalAttr_2_0(PaymentInfo.java)
Wich also makes sense, the creditCardNbr attribute in my
PaymentInfo$$EnhancerByCGLIB$$... object is still null because it hasn't
been accessed yet.
For this I have a workaround, as I can set the get-method to the
standard extractor ( here getCreditCardNbr()) and have hibernate resolve
the field value.
Maybe it would be nice to have Jibx use the extractor by default ?
Anyway, using lazyness is a requirement in my case, I guess most
hibernate users needs this feature too. I really hope there is a way
Jibx can handle the enhanced class generated by hibernate.
Thanks a lot for your help,
Arnaud Lenfant
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