docs: public int size() throws PersistenceBrokerException
      {
          if (m_fullSize == -1)
          {
              int size = 0;
              Iterator it = m_rsIterators.iterator();
              while (it.hasNext())
              {
                  size += ((OJBIterator) it.next()).size();
              }
              m_fullSize = size;
          }
          return m_fullSize;
      }