[jsr-314-open] <h:dataTable> binding vs. ui:repeat

Tue Sep 8 12:59:11 EDT 2009

On 9/7/09 6:06 PM, Andy Schwartz wrote:
> Thanks Lincoln.  I haven't had time to debug this, but I have a theory 
> about what might be happening.  In your sample:
>
>> <a:editText value="#{cc.attrs.task.text}" 
>> rendered="#{!cc.attrs.disabled}">
>> *<f:actionListener for="submit" 
>> action="#{taskController.saveTaskAjax(cc.attrs.story, 
>> cc.attrs.task)}" /> *
>> </a:editText>
>
> We expect "cc" to resolve to the containing composite component (ie. 
> to the <socialpm:taskBlock> component).  I wouldn't be surprised if 
> what is actually happening is that "cc" is  being resolved to the 
> <a:editText> composite component instead.
Yep, that's what is happening.
> One reason why I suspect this might be happening is that I know that 
> Ryan has investigated/resolved similar problems not too long ago.
The problem we resolved was the passing of #{cc.attrs} attributes 
between nested composite components.
For this case, the spec recommends using cc.parent.attrs.story and 
cc.parent.attrs.task, where parent resolves
to the nearest composite component parent of the current composite 
component.
> Another reason why I am suspicious about this is because we have faced 
> similar issues in our own (ADF Faces) declarative component solution.  
> This stuff can get tricky. :-)
>
> Hey Ryan -
>
> Does this problem look familiar?  Any thoughts on this?
>
> Andy
>
> Lincoln Baxter, III wrote:
>> Hey Andy, here you go:
>>
>> In the mean time I'm going to sign up for the dev lists.
>>
>> ----------------------------------------------------------------------
>> Using:
>> <f:actionListener for="submit" 
>> action="*#{taskController.saveTaskAjax(cc.attrs.story, 
>> cc.attrs.task)}*" />
>>
>>     *#{taskController.saveTaskAjax(cc.attrs.story, cc.attrs.task)}* =
>>     null values passed to method
>>     *#{taskController.saveTaskAjax(currentStoryBean.story, task)}* =
>>     correct values resolved, assuming currentStoryBean.story and task
>>     are both in the EL/page scope somewhere.
>>
>>
>> ----------------------------------------------------------------------
>> *CC Impl:*
>>
>>
>> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>>         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>> <html xmlns="http://www.w3.org/1999/xhtml"
>> xmlns:h="http://java.sun.com/jsf/html"
>> xmlns:f="http://java.sun.com/jsf/core"
>> xmlns:a="http://java.sun.com/jsf/composite/ajax"
>> xmlns:cc="http://java.sun.com/jsf/composite">
>> <cc:interface>
>> <cc:attribute name="story" required="true" type="Object" />
>> <cc:attribute name="task" required="true" type="Object" />
>> <cc:attribute name="disabled" required="false" type="Boolean" 
>> default="false" />
>> <cc:insertChildren />
>> </cc:interface>
>>
>> <cc:implementation>
>> <h:outputStylesheet name="socialpm/socialpm.css" />
>> <h:panelGroup id="taskBlock" layout="block" class="box-bordered p5 
>> #{cc.attrs.styleClass} taskBlock_#{cc.attrs.task.status}" 
>> style="#{cc.attrs.style}">
>>
>> <div class="m5l" style="margin-right: 25px;" >
>> <h:outputText value="#{cc.attrs.task.text}" 
>> rendered="#{cc.attrs.disabled}"/>
>> <a:editText value="#{cc.attrs.task.text}" 
>> rendered="#{!cc.attrs.disabled}">
>> *<f:actionListener for="submit" 
>> action="#{taskController.saveTaskAjax(cc.attrs.story, 
>> cc.attrs.task)}" /> *
>> </a:editText>
>> </div>
>> </cc:implementation>
>> </html>
>>
>>
>> ----------------------------------------------------------------------
>> *consuming page code:* <-- this is where task is defined in the 
>> UI:Repeat, so it is in scope
>>
>> <!DOCTYPE html
>>       PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>>       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>> <html xmlns="http://www.w3.org/1999/xhtml"
>> xmlns:c="http://java.sun.com/jsp/jstl/core"
>> xmlns:f="http://java.sun.com/jsf/core"
>> xmlns:h="http://java.sun.com/jsf/html"
>> xmlns:socialpm="http://java.sun.com/jsf/composite/socialpm"
>> xmlns:pretty="http://ocpsoft.com/prettyfaces"
>> xmlns:ui="http://java.sun.com/jsf/facelets" xml:lang="en" lang="en">
>>
>> <ui:composition>
>> <h:form id="tasksForm">
>> <c:if test="#{empty currentStoryBean.story.tasks}">
>> <div class="m5">This story has no tasks. That could be a problem 
>> later...</div>
>> </c:if>
>>
>> <ui:repeat value="#{currentStoryBean.story.tasks}" var="task">
>> <socialpm:taskBlock task="#{task}" story="#{currentStoryBean.story}"
>> members="#{currentProjectBean.project.activeMembers}"
>> disabled="#{!authorizationBean.isMember or 
>> !currentStoryBean.story.open}"
>> deletable="true" styleClass="m5t" refreshOnSave="false" />
>> </ui:repeat>
>> </h:form>
>> </ui:composition>
>> </html>
>>
>>
>>
>>
>> On Sat, 2009-09-05 at 15:23 -0400, Andy Schwartz wrote:
>>> Hey Lincoln -
>>>
>>> Lincoln Baxter, III wrote:
>>> > First, please let me know if there is a better place to ask JSF 
>>> Dev > related questions.
>>> >
>>>
>>> I suppose the Mojarra dev list might be the right place for 
>>> implementation questions:
>>>
>>> https://javaserverfaces.dev.java.net/mailinglists.html
>>>
>>> Though personally I am fine with you asking here. :-)
>>>
>>> Could you send along your composite component implementation (and 
>>> perhaps a snippet from the consuming page)?  Just want to make sure 
>>> I understand the use case.
>>>
>>> Andy
>>>
>>>
>> -- 
>> *Lincoln Baxter, III*
>> Co-Founder of OcpSoft <http://ocpsoft.com>
>> Author of PrettyFaces <http://ocpsoft.com/prettyfaces> URL Rewriting 
>> for JSF
>>
>>
>