code: public void setValue(FieldContainer container, byte[] data)
     {
        if (data != null)
        {
           container.set(m_type, ((MPPUtility.getInt(data, m_offset) & m_mask) == 0) ? m_zeroValue : m_nonZeroValue);
        }
     }
docs: Extracts the value of this bit flag from the supplied byte array
  and sets the value in the supplied container.
  
  @param container container
  @param data byte array