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From: uma_rk@comcast.net
To: "Jakarta Commons Users List" <user@commons.apache.org>
Subject: Re: [Betwixt]: Writing polymorphic beans
Date: Fri, 04 Jan 2008 18:11:32 +0000
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I would appreciate any suggestions/examples on this.

Thanks!

/U


 -------------- Original message ----------------------
From: uma_rk@comcast.net
> Env: JDK1.6, Betwixt 0.8
> 
> I have a bean A which contains a polymorphic reference to a bean B or C via
> an interface as follows:
> 
>     class A {
>          private IVehicle vehicle;
>          public IVehicle getVehicle() { ... }
>          public void setVehicle(final IVehicle v) { ... }
>     }
> 
>     class Car implements IVehicle { ... }
>     class Bus implements IVehicle { ... }
> 
> 
> I need to write an instance of A out as follows:
> 
>         <A>
>              <car>
>                   <model>...</model>
>              </car>
>          </A>
> 
> or as 
> 
>       <A>
>              <bus>
>                   <model>...</model>
>              </bus>
>          </A>
>  
> If I use a betwixt file as follows:
> 
>       <info primitiveTypes="attribute">
>             <element name="A">
>                 <addDefaults/>
>            </element>
>       </info>
> 
> I get <A><model>...</model></A>
> 
> which is clearly wrong. How can I use the PolymorphicReferenceResolver  to 
> identify
> if <car> or <bus> must be emitted?
> 
> Can you point me to a sample?
> 
> Thanks,
> 
> /U
> 
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