Re: [jibx-users] Defaull values for attributes.

[Dennis S. <dm...@so...>]

That's an interesting point - part of the reason for always writing the=20
value is to allow object reuse when unmarshalling, but that does create=20
the duplication of effort when you want the classes initialized properly=20
for direct creation. You're welcome to enter an enhancement request for=20
this issue in Jira. Perhaps what's really needed is something like an=20
additional choice besides "optional" and "required", along the lines of=20
"skip-missing".

  - Dennis

Alexander Pokahr wrote:

> Hi again,
>
> This works, but is somewhat awkward as i have
> to duplicate the default value in the binding.xml
> and in the Java class given that I want to have
> objects created directly (i.e. "new MyClass()")
> also initialized with proper default values.
>
> But thanks anyway for the quick reply.
>
> Kind regards,
> Alex
>
> Dan Cooperstock wrote:
>
>> JiBX always sets every field in the class, whether it is optional or
>> not. You can use the default=3D"value" attribute in JiBX to set defaul=
ts.
>>
>> -------------------------------------------------------------------
>> Dan Cooperstock, Senior Software Developer, Quest Software
>> 260 King St. E., Toronto ON Canada  M5A 4L5
>> dan...@qu...    416-933-5165
>> =20
>> With Quest Software, you can expect more ... more performance, more
>> productivity, more value from your IT investments.
>>
>> Visit www.quest.com to learn how.
>>
>>
>> -----Original Message-----
>> From: jib...@li...
>> [mailto:jib...@li...] On Behalf Of Alexander
>> Pokahr
>> Sent: Wednesday, June 15, 2005 9:52 AM
>> To: jib...@li...
>> Subject: [jibx-users] Defaull values for attributes.
>>
>> Hi all,
>>
>> I have an XML schema which contains default values for some attributes=
,
>> so that these can be omitted in XML files.
>>
>> I thought, a good way to map this to Java would be to have fields whic=
h
>> are initialized to this default value.
>>
>> Unfortunately, JiBX overwrites these fields in any case (even when the
>> attribute is omitted in the XML file).
>>
>> I attached a small test case that I did to verify this behaviour.
>>
>> When I run the test it prints:
>> "Test value is: null"
>>
>> I would rather expect:
>> "Test value is: default value"
>>
>> Is this a bug in JiBX, or is there a reason, why the initial field val=
ue
>> gets overwritten?
>>
>> Thanks,
>> Alex
>>
>>
>> -- test_binding.xml:
>>
>> <?xml version=3D"1.0" encoding=3D"UTF-8"?>
>> <binding>
>>
>>     <mapping class=3D"Test" name=3D"test">
>>         <value name=3D"value" field=3D"value" usage=3D"optional"
>> style=3D"attribute"/>
>>     </mapping>
>>
>> </binding>
>>
>>
>> -- test.xml:
>>
>> <?xml version=3D"1.0" encoding=3D"UTF-8"?>
>> <test/>
>>
>>
>> -- Test.java:
>>
>> import java.io.FileInputStream;
>>
>> import org.jibx.runtime.BindingDirectory;
>> import org.jibx.runtime.IBindingFactory; import
>> org.jibx.runtime.IUnmarshallingContext;
>>
>> public class Test
>> {
>>     private String value =3D "default value";
>>
>>     public static void main(String[] args)
>>     {
>>         try
>>         {
>>             // Read an object from xml
>>             IBindingFactory bfa =3D
>> BindingDirectory.getFactory(Test.class);
>>             IUnmarshallingContext uc =3D
>> bfa.createUnmarshallingContext();
>>             Test t =3D (Test)uc.unmarshalDocument(new
>> FileInputStream("test.xml"), null);
>>             System.out.println("Test value is: "+t.value);
>>         }
>>         catch(Exception e)
>>         {
>>             e.printStackTrace();
>>         }
>>     }
>> }
>>
>>
>>
>> -------------------------------------------------------
>> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
>> from IBM. Find simple to follow Roadmaps, straightforward articles,
>> informative Webcasts and more! Get everything you need to get up to
>> speed, fast. http://ads.osdn.com/?ad_id=3D7477&alloc_id=3D16492&op=3Dc=
lick
>> _______________________________________________
>> jibx-users mailing list
>> jib...@li...
>> https://lists.sourceforge.net/lists/listinfo/jibx-users
>>
>>
>>
>> -------------------------------------------------------
>> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
>> from IBM. Find simple to follow Roadmaps, straightforward articles,
>> informative Webcasts and more! Get everything you need to get up to
>> speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id=16492&op=CCk
>> _______________________________________________
>> jibx-users mailing list
>> jib...@li...
>> https://lists.sourceforge.net/lists/listinfo/jibx-users
>
>
>
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> from IBM. Find simple to follow Roadmaps, straightforward articles,
> informative Webcasts and more! Get everything you need to get up to
> speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id=16492&op=CCk
> _______________________________________________
> jibx-users mailing list
> jib...@li...
> https://lists.sourceforge.net/lists/listinfo/jibx-users
>