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https://issues.apache.org/jira/browse/MYFACES-1745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12534956
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Bernhard Huemer commented on MYFACES-1745:
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That seems to be a trivial bug of the Maven Faces Plugin's
MyFacesComponentGenerator. In order to the generate the "fancy getter", it uses
the name of the given parameter rather than the name of the property.
> for-Attribute of UIMessage and HtmlOutputLabel does not work with an EL
> Expression
> ----------------------------------------------------------------------------------
>
> Key: MYFACES-1745
> URL: https://issues.apache.org/jira/browse/MYFACES-1745
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 1.2.1-SNAPSHOT
> Environment: Tomcat 6.0.15 (snapshot), Facelets 1.1.14
> Reporter: Jan Ziegler
> Attachments: MyFaces-1745.patch
>
>
> When using an EL-Expression in the 'for'-Attribute of a UIMessage or
> HtmlOutputPanel, the EL is always resolved to null.
>
> Here is an Example:
> ...
> <h:form>
> <h:outputLabel for="#{testBean.test}" />
> <h:inputText id="#{testBean.test}" value="" required="true" />
> <h:message for="#{testBean.test}" />
> <h:commandButton value="click" />
> </h:form>
> ...
> You see that the 'for'-Attributes of the message and label as well as the
> 'id'-Attribute of the inputText refer to the same value which returns some
> valid string in my TestBean:
> ...
> public String getTest()
> {
> return "testID";
> }
> ...
> When rendering the page, a message will never be rendered (even no value is
> given but the field is required) and the label cannot be linked to the input
> field - there appears two error messages on the console:
> Attribute 'for' of label component with id j_id1:j_id2 is not defined
> Attribute 'for' of UIMessage must not be null
> which means the value of the EL-Expression resolves to null I think. In other
> cases, it is no problem to resolve the value, e.g. in an HtmlOutputText:
> <h:outputText value="#{testBean.test}" />
> Therefor I looked into the source code of UIMessage and HtmlOutputLabel. I
> think I found the bug. Look at the 'getFor()'-function of UIMessage (also in
> HtmlOutputLabel):
> public String getFor()
> {
> if (_for != null)
> {
> return _for;
> }
> ValueExpression expression = getValueExpression("forParam");
> if (expression != null)
> {
> return (String)expression.getValue(getFacesContext().getELContext());
> }
> return null;
> }
> I think 'forParam' is the wrong identifier for the ValueExpression ´cause in
> the Tag-classes, a value expression of the 'for'-Attribute is set via
> comp.setValueExpression("for", _for);
> A fix should be to use 'forParam' as an identifier in the Tag classes or
> 'for' as an identifier in the component-classes to use the same identifier
> for the value expression in all participants
> Am I right with that?
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