code: private boolean readMetaDataEntry(ReadStream is)
      throws IOException
    {
      int crc = _nonce;
      
      int code = is.read();
      crc = Crc32Caucho.generate(crc, code);
      
      switch (code) {
      case CODE_TABLE:
        readMetaTable(is, crc);
        break;
        
      case CODE_SEGMENT:
        readMetaSegment(is, crc);
        break;
        
      case CODE_META_SEGMENT:
        readMetaContinuation(is, crc);
        break;
        
      default:
        return false;
      }
      
      _metaOffset = is.position();
      
      return true;
    }
docs: Reads meta-data entries.
  
  Each segment and table is stored in the metadata.
  
  <ul>
  <li>table - metadata for a table
  <li>segment - metadata for a segment
  <li>meta - continuation pointer for further meta table data.
  </ul>