DO NOT REPLY [Bug 28481] New: - Can't call an activity from a step within a block

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http://issues.apache.org/bugzilla/show_bug.cgi?id=28481

Can't call an activity from a step within a block

           Summary: Can't call an activity from a step within a block
           Product: Commons
           Version: 1.0 Alpha
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Sandbox
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: sharples@nz1.ibm.com


If you use CallStep to invoke another activity, and the CallStep is within a 
block, rather than directly underneath the activity, then you get a 
ClassCastException when the invoked activity returns. The offending piece of 
code is here in BaseContext.execute():

                // If there are active calls, resume the most recent one
                try {
                    nextStep = (Step) calls.pop();
                    this.activity = (Activity) nextStep.getOwner();
                } catch (EmptyStackException e) {
                    ; // Can not happen
                }
                continue;

It assumes that the owner of the next step is the original activity, whereas in 
fact it could be the next step in a block. I think that Step needs to have a 
separate findActivity() method, that will return the owning activity, searching 
upwards through the owner hierarchy until it finds the activity.

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