[jboss-dev-forums] [Design of JBoss jBPM] - ProcessState 'leave' method

[rgullett]

The leave method for ProcessStates currently automatically takes the default transition despite taking a transition as a parameter.  Can it be modified so that it leaves by the transition passed in (if it isn't null) like you'd expect it to?  I want to be able to short-circuit my subprocesses in certain scenarios.  See the method as it's currently coded below. 


  public void leave(ExecutionContext executionContext, Transition transition) {
    ProcessInstance subProcessInstance = executionContext.getSubProcessInstance();

    Token superProcessToken = subProcessInstance.getSuperProcessToken();

    // feed the readable variableInstances
    if ((variableAccesses != null) && (!variableAccesses.isEmpty())) {

      ContextInstance superContextInstance = executionContext.getContextInstance();
      ContextInstance subContextInstance = subProcessInstance.getContextInstance();

      // loop over all the variable accesses
      Iterator iter = variableAccesses.iterator();
      while (iter.hasNext()) {
        VariableAccess variableAccess = (VariableAccess) iter.next();
        // if this variable access is writable
        if (variableAccess.isWritable()) {
          // the variable is copied from the sub process mapped name
          // to the super process variable name
          String mappedName = variableAccess.getMappedName();
          Object value = subContextInstance.getVariable(mappedName);
          String variableName = variableAccess.getVariableName();
          log.debug("copying sub process var '"+mappedName+"' to super process var '"+variableName+"': "+value);
          if (value!=null) {
            superContextInstance.setVariable(variableName, value, superProcessToken);
          }
        }
      }
    }

    // fire the subprocess ended event
    fireEvent(Event.EVENTTYPE_SUBPROCESS_END, executionContext);

    // remove the subprocess reference
    superProcessToken.setSubProcessInstance(null);
    
    // We replaced the normal log generation of super.leave() by creating the log here
    // and overriding the addNodeLog method with an empty version 
    superProcessToken.addLog(new ProcessStateLog(this, superProcessToken.getNodeEnter(), new Date(), subProcessInstance));

    // call the subProcessEndAction
    super.leave(executionContext, getDefaultLeavingTransition());  }


The bold line could be replaced by something like:

if(transition != null) {
   super.leave(executionContext, transition);
} else {
   super.leave(executionContext, getDefaultLeavingTransition());
}

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