#{cc.attr} attributes fail when a child component is accessed outside of the
composite component (i.e. in action listeners or other events)
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Key: MYFACES-3283
URL: https://issues.apache.org/jira/browse/MYFACES-3283
Project: MyFaces Core
Issue Type: Bug
Components: General
Affects Versions: 2.0.7
Environment: Mac OS 10.6, Tomcat 7
Reporter: Kito D. Mann
If you reference a property of child component anywhere outside of the
composite's context (i.e. in an action method, a component system event
listener, etc.), the property will not be evaluated properly if the expression
is a composite component attribute (i.e. "#{cc.attrs.property}"). This is
because the EL evaluation code can't find the parent composite component.
For example, consider the composite component:
<?xml version="1.0"?>
<html xmlns="http://www.w3.org/1999/xhtml";
xmlns:h="http://java.sun.com/jsf/html";
xmlns:composite="http://java.sun.com/jsf/composite";>
<composite:interface>
<composite:attribute name="label" />
<composite:attribute name="value" required="true" />
</composite:interface>
<composite:implementation>
<h:outputLabel for="input" value="#{cc.attrs.label}" />
<h:inputText id="input" value="#{cc.attrs.value}" />
</composite:implementation>
</html>
The calling page:
<!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:ui="http://java.sun.com/jsf/facelets";
xmlns:h="http://java.sun.com/jsf/html";
xmlns:f="http://java.sun.com/jsf/core";
xmlns:ez="http://java.sun.com/jsf/composite/demo";>
<h:head></h:head>
<h:body>
<h:form id="form">
<h:messages />
<ez:input id="composite" label="Enter something:"
value="#{testBean.value}" />
<h:commandButton value="Submit"
action="#{testBean.testCcAttribute}" />
</h:form>
</h:body>
</html>
Here's testBean.testCcAttribute():
public String testCcAttribute() {
HtmlInputText input =
(HtmlInputText)FacesContext.getCurrentInstance().getViewRoot().findComponent("form:composite:input");
UIComponent composite =
FacesContext.getCurrentInstance().getViewRoot().findComponent("form:composite");
String message = "Input control label attribute is: " +
input.getLabel() + "; Composite label attribute is: " +
composite.getAttributes().get("label");
display(message);
return null;
}
This action method generates the following message:
Input control label attribute is: null; Composite label attribute is: Enter
something:
---
Full example WAR attached.
Note this is the same as the following issue with Mojarra:
http://java.net/jira/browse/JAVASERVERFACES-2009.
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