private long[] _getLeftAndRightCategoryIds(long[] categoryIds) {
    long[] leftRightIds = new long[categoryIds.length * 3];

    for (int i = 0; i < categoryIds.length; i++) {
      long categoryId = categoryIds[i];

      try {
        AssetCategory category = AssetCategoryLocalServiceUtil.getCategory(categoryId);

        leftRightIds[3 * i] = category.getGroupId();
        leftRightIds[3 * i + 1] = category.getLeftCategoryId();
        leftRightIds[3 * i + 2] = category.getRightCategoryId();
      } catch (Exception e) {
        if (_log.isWarnEnabled()) {
          _log.warn("Error retrieving category " + categoryId);
        }
      }
    }

    return leftRightIds;
  }