function updateDataCursor(hThis,hgObject,hDataCursor,target)

% This should be a static function, therefore, ignore "hThis"

%   Copyright 1984-2004 The MathWorks, Inc. 

% If hgObject is the same as the handle cached by hThis, then
% it is safe to access the cache. This check prevents bug: g202708
doCheckCache = isequal(handle(get(hThis,'Target')), ...
                       handle(hgObject));

% calling ismethod is a big performance hit, so we use the cache instead
%Slow: if ismethod(hgObject,'updateDataCursor') 
if doCheckCache && ...
   get(hDataCursor, 'TargetHasUpdateDataCursorMethod')
  
    try
       updateDataCursor(hgObject,hDataCursor,target);
    catch
       % Something wrong with cache, do default
       hThis.default_updateDataCursor(hgObject,hDataCursor,target);
    end
    
% else do default
else
   hThis.default_updateDataCursor(hgObject,hDataCursor,target);
end