use the custom Marshaller and Unmarshaller to handle with the null values
nil="true".
Sample code in the *binding.xml*
<value style="element" name="clickDay" field="clickDay" usage="optional"
serializer="BindingUtil.serializeNilValues"
deserializer="BindingUtil.deSerializeNilValues" />
the abouve binding file can handle the below type of xml tags* "day.xml"*
<clickDay p2:nil="true" xmlns:p2="http://www.w3.org/2001/XMLSchema-instance";
/>
the same way you can create custom Marshaller and Unmarshaller for Foo, Bar
nillable values
-Thanks
Kant
On Wed, Sep 10, 2008 at 7:26 AM, Søren Andersen <[EMAIL PROTECTED]>wrote:
> Hi,
>
> I've stumbled into the following problem that I'm not 100% sure how to
> handle.
>
> I have the following situation:
>
> abstract class Foo {
>
> }
>
> class Bar extends Foo {
>
> }
>
> class Boo extends Foo {
>
> }
>
> class Baz {
> private Foo[] fooElements;
> }
>
> where fooElements can contain nulls. However, trying to marshal this only
> brings nullpointerexceptions.
> I read:
>
> http://sourceforge.net/mailarchive/[EMAIL PROTECTED]
> however, the nillable="true" method does not seem to work for me here (I've
> added it to the Bar and Boo mappings. Foo cannot take it, as it is
> abstract), nor can I compact the array as I need the objects to be 100% the
> same after a marshal / unmarshal.
> I guess it isn't that strange that it isn't handled. Foo is abstract, so
> how exactly would it represent a null?
>
> My only real idea for how to solve this is to write a custom marshaller /
> unmarshaller to handle this (and create a custom <null /> element for it),
> but I'd rather not if it can be avoided.
> I'd also like to avoid adding another object between the abstract Foo and
> the concrete classes, if possible...
>
> I may just be asking too much of the framework here and the custom
> marshaller / unmarshaller is the best option, but experience tells me there
> are loads of people smarter than me, and perhaps someone out there has
> already solved this :-)
>
> Regards,
>
> Søren Andersen
>
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