code: @Override
     protected int deleteItemByIdentifier(String cid) throws SQLException, InvalidItemStateException, RepositoryException
     {
        if (deleteItem == null)
        {
           deleteItem = dbConnection.prepareStatement(DELETE_ITEM);
        }
        else
        {
           deleteItem.clearParameters();
        }
  
        deleteItem.setString(1, cid);
  
        return executeUpdate(deleteItem, TYPE_DELETE_ITEM);
     }
docs: {@inheritDoc}