https://issues.apache.org/bugzilla/show_bug.cgi?id=49345
Summary: EL does not work correctly with JSF 2.0 composite
components
Product: Tomcat 7
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Severity: major
Priority: P2
Component: Jasper
AssignedTo: dev@tomcat.apache.org
ReportedBy: curtiss.how...@gmail.com
We are using JSF 2.0's <f:validateBean> tag with a JSF 2.0 composite component:
<ex:ExampleComposite id="example1" managedBean="#{beanValidation}">
<f:validateBean for="example1:input"/>
</ex:ExampleComposite>
#{beanValidation} corresponds to a bean with property "value" which is used as
the value for the input box "example1:input" defined in the composite
component. As this is a custom component, the "for" attribute really needs to
resolve #{cc.attrs.beanValidation.value}. In MyFaces, we defer to Tomcat's
ValueExpressionImpl.getValueReference() method to obtain a ValueReference
containing the underlying bean and the correct property name. However, what we
end up with is a ValueReference containing the correct bean and an incorrect
property name ("attrs" instead of "value"). Hence, we end up with an exception
when trying to validate. I've dug around a bit and I can trace the issue back
to AstValue.getValueReference() (or at least, I think this is it):
return new ValueReference(t.base, this.jjtGetChild(1).getValue(ctx));
I don't think the Tomcat EL code is taking composite components into account
here and is simply lopping off the first part of the EL expression no matter
what. For composite components, more than that has to be trimmed off as
everything is prefixed with "cc.attrs".
Note that this issue has been independently verified by another member of the
MyFaces team and it has been confirmed that running MyFaces with Sun's EL
implementation works, so the problem is not on MyFaces's side.
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