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List:       jibx-users
Subject:    Re: [jibx-users] marshalling based on 'choice'
From:       Bao Trang <btrang () gmail ! com>
Date:       2004-09-22 13:02:36
Message-ID: f53bfceb04092206023b4c64c8 () mail ! gmail ! com
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I'll give it a shot.  Thanks!


On Tue, 21 Sep 2004 19:12:48 -0700, Dennis Sosnoski <dms@sosnoski.com> wrote:
> Bao Trang wrote:
> 
> >In my java class, I have a boolean and two objects, A and B.  If the
> >boolean is set to true, I want the marshaller to output object A in my
> >XML file.  Otherwise, I want the marshaller to output object B.
> >
> >
> You should be able to do this by using a pair of test-methods, one for
> object A (which just returns the boolean) and one for object B (which
> returns the logical not of the boolean). Then your binding definition
> would go something like this:
> 
>   <mapping ...>
>     ...
>     <structure name="A" field="aproperty" usage="optional"
> test-method="testA">
>       ...
>     </structure>
>     <structure name="B" field="bproperty" usage="optional"
> test-method="testB">
>       ...
>     </structure>
>     ...
> 
> >Conversely, when I'm unmarshalling, if Object A exists, I want my
> >boolean to be set to true.  Otherwise if Object B exists in the xml
> >file, I want the boolean to be set to false.
> >
> There's no way to do this directly, but you can use the above binding
> fragment and add a post-set method to the containing object binding. The
> post-set method will be called after that object has been unmarshalled,
> and you can then set your boolean as "aproperty != null". You can also
> use the post-set method to check that one and only one of the
> alternatives was included in the unmarshalled document, if you want
> (throwing an exception if neither was present or both were present).
> 
>   - Dennis
> 
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