AW: [riena-dev] 264325 - NoSuchMethodException and POJOs

["Schenkel, Thorsten" <Thorsten.Schenkel@xxxxxxxxxxxx>]

Hi,

I also prefer if the ridget will wrap given POJOs internally.
If the bean has no property change support (no method addPropertyChangeListener), the bean will be wrapped in PojoObservable.

Kind regards

Thorsten


-----Ursprüngliche Nachricht-----
Von: riena-dev-bounces@xxxxxxxxxxx [mailto:riena-dev-bounces@xxxxxxxxxxx] Im Auftrag von Drossel, Carsten
Gesendet: Montag, 23. Februar 2009 08:22
An: Riena Developers list
Betreff: AW: [riena-dev] 264325 - NoSuchMethodException and POJOs

Hi Elias,

couldn't we switch to PojoObservables internally? (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=263031 )

Greetings,
Carsten

> -----Ursprüngliche Nachricht-----
> Von: riena-dev-bounces@xxxxxxxxxxx [mailto:riena-dev-
> bounces@xxxxxxxxxxx] Im Auftrag von Elias Volanakis
> Gesendet: Samstag, 21. Februar 2009 02:50
> An: riena-dev@xxxxxxxxxxx
> Betreff: [riena-dev] 264325 - NoSuchMethodException and POJOs
>
> Just a quick heads-up:
>
> The 3.5 databinding is more strict and will throw
> NoSuchMethodException when using BeanObservables with a POJO (i.e. a
> class that does not accept property change listeners). The exception
> usually does not cause any harm, however it is written to the log. The
> solution is very easy. Use PojoObservables instead:
>
> Exception:
>
> !MESSAGE Could not attach listener to
> org.eclipse.riena.example.client.controllers.SharedViewDemoSubModuleCon
> troller$TxtBean@1a1a1c6
> !STACK 0
> java.lang.NoSuchMethodException:
> org.eclipse.riena.example.client.controllers.SharedViewDemoSubModuleCon
> troller$TxtBean.addPropertyChangeListener(java.beans.PropertyChangeList
> ener)
>         at java.lang.Class.getMethod(Class.java:1605)
>         at
> org.eclipse.core.internal.databinding.beans.BeanPropertyListenerSupport
> .processListener(BeanPropertyListenerSupport.java:96)
> [...]
>
> Problem:
>
> TxtBean bean = new TxtBean();
> // TxtBean is actually NOT a bean - its a POJO.
> // bindToModel uses BeansObservables.observeValue(bean, "txt")
> internaly because it expects a bean
> // => exception
> labelFacade.bindToModel(bean, "txt");
>
> Solution:
>
> // use this variant of bindToModel together with PojoObservables:
> labelFacade.bindToModel(PojoObservables.observeValue(bean, "txt"))
>
> Hope this helps,
> Elias.
>
> PS: No need to do anything in the Examples. I'm taking care of this...
> _______________________________________________
> riena-dev mailing list
> riena-dev@xxxxxxxxxxx
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