The selector mixen works with a selector binding I wrote. The goal is
for ${selector:id} to return the client id of the component with the
id passed to selector. The binding also supports 'this' for an id
which returns the client id of the containing component that supports
getClientId(). So to make that work there is a
ComponentClassTransformWorker that does the following:
public void transform(ClassTransformation transformation,
MutableComponentModel model) {
List<TransformMethod> methods = transformation.matchMethods( new
Predicate<TransformMethod>() {
@Override
public boolean accept(TransformMethod method) {
if ( "getClientId".equals(method.getName()) ) {
return true;
}
return false;
}
});
if ( methods == null || methods.size() == 0 ) {
return;
}
model.addMixinClassName(Selector.class.getName(),"before:*");
}
The selector mixin works with selector binding thru a per thread
service that implements a stack. The top of the stack should be the
mixin of the currently rendering component that implements
getClientId.
So the mixin is added to all components that support getClientId. The
mixin pushes itself onto the stack in beginRender and pops the stack
in afterRender. The before:* is important so the stack is correct when
the other mixins render. This way the selector binding can call
getClientId on the component represented by the top of the stack.
In the example above the selector binding returns the form when I
think it should be the select.
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