Misunderstanding of phases

[Marius Oancea <ma...@yahoo.ca>]

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I have the following piece of code:
[code]    <h:dataTable value="#{itemsList}" var="tocEntry"
rendered="#{not empty itemsList}">
        <h:column>
            <h:outputText value="#{courseTracker.currentItem ==
tocEntry}" />
            <h:commandLink action="#{courseTracker.selectTocEntry}"
> #{tocEntry.learnItem.title}#{tocEntry.quiz.title}
            </h:commandLink>
        </h:column>
    </h:dataTable>[/code]

the code display correctly :
[code]falseGetting familiar with your JSP server
falseYour first JSP
[b]true[/b]Opening the editor
falseStart coding
falseAdding dynamic content via expressions
falseScriptlets
falseScriplets test
falseJSP Professional  [/code]


If I select a new entry (e.g. Start coding) the boolean value before
the enty is changed and the selected entry in backing bean is also
changed. (All perfect until now).

I wanted to only render the outputText if the enty is selected. So i
changed the obove code to :

[code]    <h:dataTable value="#{itemsList}" var="tocEntry"
rendered="#{not empty itemsList}">
        <h:column>
            <h:outputText value="SOMETHING "
[b]rendered[/b]="#{courseTracker.currentItem == tocEntry}" />
            <h:commandLink action="#{courseTracker.selectTocEntry}"
> #{tocEntry.learnItem.title} </h:commandLink>
        </h:column>
    </h:dataTable>[/code]


Once i did that, any link i press (to make another selection) the same
think is submitted (row 0 is submitted as selected).

If i put styleClass instead of renderer and i do the right css all is
working again. Why "outputText rendered" can disturb the selection?

I think there is something with the time when the condition is
evaluated and with the time when "column" is rendered ... Phases
listeners or so ....

I'm not expert in JSF but what is so special with "rendered"
attribute? I think this attribute is somehow special being rendered
before rendering. How to avoid this problem?


- ------

I did some more research and seems that if i put the expression into
another place than in "rendered" attribute, the expresion is evaluated
during uitext.encodeBegin called by renderChild included into the flow
of table.renderColumnBody. See stack below:
[code]UIText.encodeBegin(FacesContext) line: 49
RendererUtils.renderChild(FacesContext, UIComponent) line: 441
RendererUtils.renderChildren(FacesContext, UIComponent) line: 427
RendererUtils.renderChild(FacesContext, UIComponent) line: 448
HtmlTableRenderer(HtmlTableRendererBase).renderColumnBody(FacesContext,
ResponseWriter, UIData, UIComponent, Iterator) line: 195
HtmlTableRenderer(HtmlTableRendererBase).encodeColumnChild(FacesContext,
ResponseWriter, UIData, UIComponent, Iterator) line: 168
HtmlTableRenderer(HtmlTableRendererBase).encodeInnerHtml(FacesContext,
UIComponent) line: 154
HtmlTableRenderer(HtmlTableRendererBase).encodeChildren(FacesContext,
UIComponent) line: 94
HtmlDataTable(UIComponentBase).encodeChildren(FacesContext) line: 319
FaceletViewHandler.encodeRecursive(FacesContext, UIComponent) line: 513
FaceletViewHandler.encodeRecursive(FacesContext, UIComponent) line: 518
FaceletViewHandler.renderView(FacesContext, UIViewRoot) line: 447
LifecycleImpl.render(FacesContext) line: 300[/code]



If i do the same but putting the el into the rendered attribute, the
el gets called at a diferent moment (see the stack below):
[code]HtmlOutputText(UIComponentBase).isRendered() line: 822
HtmlOutputText(UIComponentBase).processDecodes(FacesContext) line: 393
HtmlDataTable(UIData).process(FacesContext, UIComponent, int) line: 511
HtmlDataTable(UIData).processColumnChildren(FacesContext, int) line: 498
HtmlDataTable(UIData).processDecodes(FacesContext) line: 381
UIViewRoot(UIComponentBase).processDecodes(FacesContext) line: 397
UIViewRoot.processDecodes(FacesContext) line: 131
LifecycleImpl.applyRequestValues(FacesContext) line: 177
LifecycleImpl.execute(FacesContext) line: 71[/code]


What am I missing ?
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