Thomas Herzog created MYFACES-4026:
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Summary: Composite Component cc.clientId not usable in custom tag
Key: MYFACES-4026
URL: https://issues.apache.org/jira/browse/MYFACES-4026
Project: MyFaces Core
Issue Type: Bug
Components: General
Affects Versions: 2.1.17
Reporter: Thomas Herzog
Priority: Trivial
If you use the cc.clientId in a custom tag, then the wrong ids are generated.
{code:xml}
<composite:implementation>
<cure:grid id="#{cc.clientId}">
<cure:gridRow>
<cure:gridCol width="12">
my col
</cure:gridCol>
</cure:gridRow>
</cure:grid>
</composite:implementation>
{code}
Here we need an id otherwise an update on this component will fail since there
wouldn't be an html node on the client side which contents can be replaced by
an update. There are some cases where the composite component is not allowed to
define an div which holds the client id.
{code:xml}
<composite:implementation>
<!-- Would break grid container specification -->
<div id="#{cc.clientid}">
<cure:gridRow>
<cure:gridCol width="12">
my col
</cure:gridCol>
</cure:gridRow>
<div>
</composite:implementation>
{code}
We think this is caused by the fact that the cc.clientId is accessed during
build view time and gets cached in the UIComponentBase. At this time the
cc.clientId is empty. This seems to be a common issue, because cc.clientId can
never be accessed at build view time.
{code:title="UIComponentBase#getClientId"}
@Override
public String getClientId(FacesContext context)
{
if (context == null)
{
throw new NullPointerException("context");
}
if (_clientId != null)
{
return _clientId;
}
...
}
{code}
{code:xml|title="one of the custom tags we use"}
<ui:composition
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:p="http://primefaces.org/ui";
xmlns:ui="http://java.sun.com/jsf/facelets";>
<c:set var="styleClass" value="#{not empty styleClass ? styleClass : ''}" />
<c:set var="style" value="#{not empty style ? style : ''}" />
<c:set var="rendered" value="#{not empty rendered ? rendered : true}" />
<c:set var="isFormRow" value="#{not empty isFormRow and isFormRow}" />
<c:if test="#{not empty id}">
<h:panelGroup id="#{id}" layout="block" styleClass="#{isFormRow
? 'form-row' : ''} #{styleClass} ui-grid-row" style="#{style}"
rendered="#{rendered}">
<ui:insert/>
</h:panelGroup>
</c:if>
<c:if test="#{empty id}">
<h:panelGroup layout="block" styleClass="#{isFormRow ?
'form-row' : ''} #{styleClass} ui-grid-row" style="#{style}"
rendered="#{rendered}">
<ui:insert/>
</h:panelGroup>
</c:if>
</ui:composition>
{code}
{code:html|title="resulting html"}
<!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";>
<head></head>
<body>
<form id="myForm1" name="myForm1" method="post"
action="/jsf2-basic-portlet/index.xhtml"
enctype="application/x-www-form-urlencoded">
<div id="composite1:composite1" class=" ui-grid ui-grid-responsive">
<div class=" ui-grid-row">
<div class=" ui-grid-col-12">
my col
</div>
</div>
</div>
<input type="hidden" name="myForm1_SUBMIT" value="1" /><input
type="hidden" name="javax.faces.ViewState" id="javax.faces.ViewState"
value="puXzCX78lsGwm5D7TAEgUKup9vm0hFpybGfw7y1R85EQt46s" />
</form>
<form id="myForm2" name="myForm2" method="post"
action="/jsf2-basic-portlet/index.xhtml"
enctype="application/x-www-form-urlencoded"><span
id="myForm2:composite2:myOutputText">OutputText</span><input type="hidden"
name="myForm2_SUBMIT" value="1" /><input type="hidden"
name="javax.faces.ViewState" id="javax.faces.ViewState"
value="puXzCX78lsGwm5D7TAEgUKup9vm0hFpybGfw7y1R85EQt46s" /></form>
</body>
</html>
{code}
I have an sample which I could provide but here is no option to upload it.
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