| Re: AW: [riena-dev] 264325 - NoSuchMethodException and POJOs |
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Hi Rieners, will there be any drawbacks using PojoObservables ? (functionality ? performance ?) my entity beans already have always PropertyChangeSupport, because I also need this to use my beans as dynamic facts inside a rule-engine (Drools) I think Thorstens idea to use PojoObservables only if the bean has no PropertyChangeSupport sounds flexible ekke Schenkel, Thorsten schrieb: 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 https://dev.eclipse.org/mailman/listinfo/riena-dev_______________________________________________ riena-dev mailing list riena-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/riena-dev _______________________________________________ riena-dev mailing list riena-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/riena-dev --
ekkehard gentz |