@Override
public Transition getNextTransition(ExecutionElement currentElem, String currentExitStatus) {
final String method = "getNextTransition";
if (logger.isLoggable(Level.FINE))
logger.fine(method + " ,currentExitStatus=" + currentExitStatus);
String nextAttrId = null;
ExecutionElement nextExecutionElement = null;
Transition returnTransition = new TransitionImpl();
if (currentElem instanceof Step) {
nextAttrId = ((Step) currentElem).getNextFromAttribute();
nextExecutionElement = getExecutionElementByID(nextAttrId);
} else if (currentElem instanceof Split) {
nextAttrId = ((Split) currentElem).getNextFromAttribute();
nextExecutionElement = getExecutionElementByID(nextAttrId);
} else if (currentElem instanceof Flow) {
nextAttrId = ((Flow) currentElem).getNextFromAttribute();
nextExecutionElement = getExecutionElementByID(nextAttrId);
} else if (currentElem instanceof Decision) {
// Nothing special to do in this case.
}
List<ControlElement> controlElements = currentElem.getControlElements();
if (nextExecutionElement == null && controlElements.isEmpty()) {
if (logger.isLoggable(Level.FINE))
logger.fine(method + " return null, there is no next step");
// Don't set anything special on return transition.
return returnTransition;
} else if (nextExecutionElement != null) {
if (logger.isLoggable(Level.FINE))
logger.fine(method + " return execution element:" + nextExecutionElement);
returnTransition.setNextExecutionElement(nextExecutionElement);
return returnTransition;
} else if (controlElements.size() > 0) {
Iterator<ControlElement> iterator = controlElements.iterator();
while (iterator.hasNext()) {
ControlElement elem = iterator.next();
if (logger.isLoggable(Level.FINE)) {
logger.fine(method + " Trying to match next control element: " + elem);
}
if (elem instanceof Stop) {
String exitStatusToMatch = ((Stop) elem).getOn();
boolean isMatched = matchSpecifiedExitStatus(currentExitStatus, exitStatusToMatch);
if (isMatched == true) {
if (logger.isLoggable(Level.FINE))
logger.fine(method + " , Stop element matches to " + exitStatusToMatch);
returnTransition.setControlElement(elem);
return returnTransition;
}
} else if (elem instanceof End) {
String exitStatusToMatch = ((End) elem).getOn();
boolean isMatched = matchSpecifiedExitStatus(currentExitStatus, exitStatusToMatch);
if (isMatched == true) {
if (logger.isLoggable(Level.FINE))
logger.fine(method + " , End element matches to " + exitStatusToMatch);
returnTransition.setControlElement(elem);
return returnTransition;
}
} else if (elem instanceof Fail) {
String exitStatusToMatch = ((Fail) elem).getOn();
boolean isMatched = matchSpecifiedExitStatus(currentExitStatus, exitStatusToMatch);
if (isMatched == true) {
if (logger.isLoggable(Level.FINE))
logger.fine(method + " , Fail element matches to " + exitStatusToMatch);
returnTransition.setControlElement(elem);
return returnTransition;
}
} else if (elem instanceof Next) {
String exitStatusToMatch = ((Next) elem).getOn();
boolean isMatched = matchSpecifiedExitStatus(currentExitStatus, exitStatusToMatch);
if (isMatched == true) {
// go to next executionElement
nextExecutionElement = getExecutionElementByID(((Next) elem).getTo());
if (logger.isLoggable(Level.FINE))
logger.fine(
method
+ " , match to "
+ exitStatusToMatch
+ ". Continue to step "
+ nextExecutionElement.getId());
// No point setting the ControlElement in the transition.
returnTransition.setNextExecutionElement(nextExecutionElement);
return returnTransition;
}
} else {
throw new IllegalStateException(
"Shouldn't be possible to get here. Unknown control element, " + elem.toString());
}
}
}
// TODO - Is this an error case or a valid end/completion case?
return null;
}