private String determineReturnNodeName(RouteNode node, MovePoint movePoint, int currentStep)
throws InvalidActionTakenException {
if (currentStep == movePoint.getStepsToMove()) {
return node.getRouteNodeName();
}
List previousNodes = node.getPreviousNodes();
if (previousNodes.size() == 0) {
throw new InvalidActionTakenException(
"Could not locate the named target node in the document's past route. Halted on step "
+ currentStep);
}
if (previousNodes.size() != 1) {
throw new InvalidActionTakenException(
"Located a multi-branch path, could not proceed backward past this point. Halted on step "
+ currentStep);
}
return determineReturnNodeName((RouteNode) previousNodes.get(0), movePoint, currentStep - 1);
}
public void addNextNode(RouteNode nextNode) {
getNextNodes().add(nextNode);
nextNode.getPreviousNodes().add(this);
}