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Posted to dev@myfaces.apache.org by "Matt Benson (JIRA)" <de...@myfaces.apache.org> on 2011/08/18 01:24:27 UTC
[jira] [Reopened] (MYFACES-3283) #{cc.attr} attributes fail when a
child component is accessed outside of the composite component (i.e. in
action listeners or other events)
[ https://issues.apache.org/jira/browse/MYFACES-3283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matt Benson reopened MYFACES-3283:
----------------------------------
RE "burden of proof," fair enough. Let's scour the spec and seek clarification if necessary.
> #{cc.attr} attributes fail when a child component is accessed outside of the composite component (i.e. in action listeners or other events)
> -------------------------------------------------------------------------------------------------------------------------------------------
>
> 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
> Attachments: myfaces_cc_issue.war
>
>
> 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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