Manuel K created MYFACES-4583:
---------------------------------
Summary: cc.getValueExpression not evaluated correctly
Key: MYFACES-4583
URL: https://issues.apache.org/jira/browse/MYFACES-4583
Project: MyFaces Core
Issue Type: Bug
Components: General
Affects Versions: 4.0.0-RC5
Environment: primefaces-test project, jakarta branch
Reporter: Manuel K
Attachments: image-2023-03-06-10-38-02-649.png
When having a composite component where _cc:getValueExpression_ is used in a
_c:if_ to check if a value has been passed as an attribute, the call does not
return the desired result.
This methodology has been suggest by BalusC here:
https://stackoverflow.com/a/11368475/10157328
The composite component looks as follows (simplified):
{code:java}
<?xml version="1.0" encoding="UTF-8"?>
<ui:component xmlns="http://www.w3.org/1999/xhtml";
xmlns:h="http://xmlns.jcp.org/jsf/html";
xmlns:cc="http://xmlns.jcp.org/jsf/composite";
xmlns:ui="http://xmlns.jcp.org/jsf/facelets";
xmlns:f="http://xmlns.jcp.org/jsf/core";
xmlns:c="http://xmlns.jcp.org/jsp/jstl/core";
xmlns:p="http://primefaces.org/ui";>
<cc:interface>
<!-- Edit Menu Item -->
<cc:attribute name="editValue"
default="Edit"/>
<cc:attribute name="editAction"
method-signature="java.lang.String
action(java.lang.Object)"/>
</cc:interface>
<cc:implementation>
<p:menuButton id="menubutton"
value="Menu">
<c:if test="#{not empty cc.getValueExpression('editAction')}">
<p:menuitem id="edit"
value="#{cc.attrs.editValue}"
action="#{cc.attrs.editAction}"/>
</c:if>
</p:menuButton>
</cc:implementation>
</ui:component>
{code}
On Mojarra, the if works correctly, while on MyFaces the p:menuitem is never
rendered. When debugging, the following expression in the method
_UIComponent#getValueExpression_ returns null:
{code:java}
(Map)this.getStateHelper().get(UIComponent.PropertyKeys.bindings);{code}
I have created a reproducer here:
[https://github.com/mkomko/primefaces-test/tree/composite-component-get-value-expression]
The menu should render a MenuItem like so:
!image-2023-03-06-10-38-02-649.png!
It works using
{code:java}
mvn clean jetty:run -Pmojarra40{code}
but not using
{code:java}
mvn clean jetty:run -Pmyfaces40{code}
Thank you very much in advance for taking a look!
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
