code: public boolean valid()
      {
          boolean valid = true;
          if (tc.isEntryEnabled())
              Tr.entry(tc, "valid", this);
          if (_status == STATUS_INVALID)
              valid = false;
          if (tc.isEntryEnabled())
              Tr.exit(tc, "valid", new Boolean(valid));
          return valid;
      }
docs: Test to determine if the target log file header belongs to a valid RLS
  file.
  
  @return boolean true if the log file header is valid, otherwise false.