Cyclomatic Complexity

OrderValidation.java

// Reduce complexity of the code
public boolean isOrderValid(Order order) {
    if (order != null) {
        if (order.getItems() != null && !order.getItems().isEmpty()) {
            for (OrderItem item : order.getItems()) {
                if (item.getQuantity() > 0) {
                    // Validate item
                } else {
                    return false;
                }
            }
            return true;
        } else {
            return false;
        }
    } else {
        return false;
    }
}

// Refactored version
public boolean isOrderValid(Order order) {
    if (order == null || order.getItems() == null || order.getItems().isEmpty()) {
        return false;
    }
    
    for (OrderItem item : order.getItems()) {
        if (item.getQuantity() <= 0) {
            return false;
        }
        // Validate item
    }
    
    return true;
}