Calling a service method from a DataAction

Hello!
I'm trying to call a service method from a DataAction, cobbling ideas from the Oracle JDeveloper 10g Handbook and the Oracle ADF Data Binding Primer.
I have created a service method and exposed it using the client interface node of the application module editor. It is called "process()" and it now appears in the data control palette under MyAppDataControl->Operations (just above the built-in action bindings Commit and Rollback). As part of this procedure, I modified MyAppImpl.java and put the process() method there.
I don't want to call process() by dragging and dropping it onto a Data Action because depending on the outcome, I want to branch to different pages. process() returns an int that will tell me where to branch. Thus, I am trying to call it from an overridden invokeCustomMethod() method of the lifecycle of a DataAction, where I can get the int, create a new ActionForward, and set it in the DataActionContext. (If I'm barking up the wrong tree, let me know!)
So, I need to call MyAppImpl.process() from within the invokeCustomMethod() method of my DataAction. Looking at the class declaration, I noticed that it extends ApplicationModuleImpl. I figure that, if I can get the ApplicationModule, I can cast it to MyAppImpl and call the process() method. Unfortunately, that doesn't work. When I got the application module, I checked the class and it's oracle.jbo.common.ws.WSApplicationModuleImpl. I tried casting it and got a class cast exception.
Here's the code I'm using:
protected void invokeCustomMethod(DataActionContext actionContext) {
BindingContext ctx = actionContext.getBindingContext();
DCDataControl dc = ctx.findDataControl("MyAppDataControl");
log.debug("invokeCustomMethod(): dc.getClass().getName()=" + dc.getClass().getName()); // result is: oracle.jbo.uicli.binding.JUApplication
ApplicationModule am = null;
MyAppImpl myAppImpl = null;
int processResult = 0;
if (dc instanceof DCJboDataControl) { // this is true
am = dc.getApplicationModule();
log.debug("invokeCustomMethod(): am.getClass().getName()=" + am.getClass().getName()); // result is: oracle.jbo.common.ws.WSApplicaitonModuleImpl
if (am instanceof ApplicationModuleImpl) { // this is false
log.debug("invokeCustomMethod(): am is an instanceof ApplicationModuleImpl.");
if (am instanceof MyAppImpl) { // this is false
log.debug("invokeCustomMethod(): am is an instanceof MyAppImpl.");
processResult = ((MyAppImpl)am).process();
log.debug("invokeCustomMethod(): processResult=" + processResult);
super.invokeCustomMethod(actionContext);
What am I doing wrong? Can anyone explain the different class hierarchies and why my application module isn't the class I'm expecting?
Thanks,
-Anthony Carlos

Georg,
it was in the javadoc of oracle.adf.model.binding.DCBindingContainer
http://www.oracle.com/webapps/online-help/jdeveloper/10.1.2/state/content/vtTopicFile.bc4jjavadoc36%7Crt%7Coracle%7Cadf%7Cmodel%7Cbinding%7CDCBindingContainer%7Ehtml/navId.4/navSetId._/
However, I see it's not the case in other sub-classes of JboAbstractMap like DCControlBinding and DCDataControl.
Weird... I'm keeping you informed if I find more information.
Regards,
Didier.

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