http://googcloudlabs.appspot.com/codelabexercise5.html



String searchFor = req.getParameter("q");
PrintWriter out = resp.getWriter();
if (searchFor == null || searchFor.equals("") || searchFor ==
"*")
  out.println(entityAPI.getAllProducts("Product"));
else
  out.println(entityAPI.getProduct(searchFor));


this code is obviously wrong and generates exceptions. Please either
put a note that this (and more similar) bug was introduced on purpose
so that readers have a chance to exercise their debugging skills or
fix the bug.

P.S. I hope real Google products are written a bit more carefully :)

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