[omniORB] Sequence of valuetype

[Björn Hagemeier]

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Hi all,

I have the following IDL code which compiles without complaints using
omniORB 4.1.0:

/** BEGIN IDL CODE */
valuetype AbstractAction {

}

typedef sequence<AbstractAction> AbstractActionSeq;

valuetype ActionGroup : AbstractAction {
   public AbstractActionSeq actions;
}

valuetype AbstractJob : ActionGroup {

}

valuetype AbstractTask : AbstractAction {

}

valuetype ExecuteTask : AbstractTask {

}
/** END IDL CODE */

Think of it as a composite pattern to model hierarchical data. The class
hierarchy is more complex than it needs to be at the first sight, but I
stripped down the data I consider unimportant for describing this problem.

In the client I create an ExecuteTask_impl (that's what I called the
implementation type) like this:

ExecuteTask_impl *exTask = new ExecuteTask_impl();
  AbstractActionSeq taskSeq(1); taskSeq.length(1);
taskSeq[0] = exTask;
AbstractJob_impl *job =	new AbstractJob_impl(taskSeq);

The job is passed to the following interface:

/** BEGIN IDL CODE */
  interface SchedulerIf {
    boolean submitJob(in AbstractJob _job);
  };
/** END IDL CODE */

The server causes a BAD_PARAM_ValueFactoryFailure exception in
valueType.cc:630. omniValueType::handleIncompatibleValue is called from
AbstractAction::_NP_unmarshal, which means the server could not
interpret the value (an ExecuteTask) as an AbstractAction, although the
former is derived from the latter.

If I change the client code such that the sequence in the
AbstractJob_impl object is filled with _true_ AbstractActions instead of
derived types, unmarshalling works perfectly.

Is this behavior intended and if so, how can I cleanly work around it?


Regards,

Björn

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