Vaadin JPA Container Lazy Loading Broke

jpacontainer.java

    /**
     * <strong>This implementation does not use lazy loading and performs
     * <b>extremely</b> bad when the number of items is large! Do not use unless
     * you absolutely have to!</strong>
     * <p>
     * {@inheritDoc }
     */
    public int indexOfId(Object itemId) {
        /*
         * This is intentionally an ugly implementation! This method should not
         * be used!
         */
        int size = size();
        if (size > 100) {
            Logger.getLogger(getClass().getName())
                    .warning(
                            "(JPAContainer) WARNING! Invoking indexOfId() when size > 100 is not recommended!");
        }
        for (int i = 0; i < size; i++) {
            Object id = getIdByIndex(i);
            if (id == null) {
                return -1;
            } else if (id.equals(itemId)) {
                if (!isWriteThrough() && bufferingDelegate.isDeleted(id)) {
                    return -1;
                }
                return i;
            }
        }
        return -1;
    }