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From Michael Concini <>
Subject Re: [JSF 2.0] Need help - restore state not working properly in facelets
Date Wed, 21 Oct 2009 21:03:01 GMT

I disabled partial state saving, and everything works as expected.  I 
had also previously tried using the same snippet in a JSP and it worked 
ok there as well.  So the problem is definitely only occurring with 
partial state saving enabled.

I'm not sure I follow how the binding attribute would come into play in 
this scenario.  The value change listener is being engaged ok.  In fact, 
the problem seems to be occurring well before that listener is engaged.  
The component's restoreState method is never actually being called, so 
when the value change listener is getting called during validation, its 
being passed the original value from the page, not the updated value 
that should have been restored from the previous state. 


Leonardo Uribe wrote:
> Hi
> 2009/10/20 Michael Concini < 
> <>>
>     All,
>     I've run into what appears to be a bug in the new state
>     saving/restoring code for facelets.
>     I've got a simple xhtml page with a one field form and a value
>     change listener attached.  The listener simply outputs the old
>     value and the new value to SystemOut.  On every postback, its
>     showing the old value as what was originally set by the 'value'
>     attribute and not the value from the previous request as would be
>     expected.
>     <h:form id="form1">
>         <h:commandButton value="Press here" id="testListeners" />
>         <h:inputText id="testValueChangeListener" value="some text">
>               <f:valueChangeListener
>     binding="#{coreTagsBean.testValueChangeListener}"
>     type="listener.TestValueChangeListener" />
>           </h:inputText>
>     </h:form>
>     I stepped through the code in the debugger, and when we get into
>     DefaultFaceletsStateManagementStrategy.restoreView(), the states
>     are always coming up null in the return object array returned form
>     the HtmlResponseStateManager from this code snippet (lines 160-161
>     in my view)
>           state = (Object[]) manager.getState (context, viewId);
>           states = (Map<String, Object>) state[1];
>     Since states is null, when we execute restoreStateFromMap(), we
>     don't ever execute the restoreState() method on the component
>     since we have not recovered the state data.
>     I've stepped through the code for state saving, and it looks to me
>     as though the state data for the input text field is being saved
>     properly, but I'm not very familiar with how the state
>     saving/restoring code works.  I'd be happy to continue doing the
>     debugging if someone could point me in the right direction, but I
>     would appreciate any help from those in the community who are more
>     familiar with the state management code.
> The first part works as expected (state=null). For partial state 
> saving, the component tree is built on every request. If nothing 
> changes, no state is saved for the component. In jsf 2.0, there was 
> some changes related to the behavior of binding attribute, so maybe it 
> is related to this one. It could be good to test is without partial 
> state saving, to see how it should behave.
> regards,
> Leonardo Uribe
>     Thanks,
>     Mike

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