private static void updateHistory()

in src/main/java/org/apache/commons/scxml2/io/ModelUpdater.java [243:273]
30 lines of code
8 McCabe index (conditional complexity)

    private static void updateHistory(final History history,
                                      final Map<String, TransitionTarget> targets,
                                      final TransitionalState parent)
            throws ModelException {
        final SimpleTransition transition = history.getTransition();
        if (transition == null || transition.getNext() == null) {
            logAndThrowModelError(ERR_HISTORY_NO_DEFAULT,
                    new Object[] {history.getId(), getName(parent)});
        }
        else {
            updateTransition(transition, targets);
            final Set<TransitionTarget> historyStates = transition.getTargets();
            if (historyStates.isEmpty()) {
                logAndThrowModelError(ERR_STATE_NO_HIST,
                        new Object[] {getName(parent)});
            }
            for (final TransitionTarget historyState : historyStates) {
                if (!history.isDeep()) {
                    // Shallow history
                    if (!parent.getChildren().contains(historyState)) {
                        logAndThrowModelError(ERR_STATE_BAD_SHALLOW_HIST,
                                new Object[] {getName(parent)});
                    }
                } else // Deep history
                if (!historyState.isDescendantOf(parent)) {
                    logAndThrowModelError(ERR_STATE_BAD_DEEP_HIST,
                            new Object[] {getName(parent)});
                }
            }
        }
    }