XWorkBasicConverter doConvertToCollection causes ClassCastException if an item
cannot be converted
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Key: WW-3762
URL: https://issues.apache.org/jira/browse/WW-3762
Project: Struts 2
Issue Type: Bug
Components: Value Stack
Affects Versions: 2.3.1.2
Reporter: Pelladi Gabor
Attachments: WW-3762.diff
My action has a property of type List<Integer> (same for other non-string
types). The action will later iterate over this property, and it gets a
ClassCastException, because the list (of type List<Integer>) contains a String.
It is because XWorkBasicConverter.doConvertToCollection() converts the input
string array into an integer list. But if the input coming from the browser
contains a value that cannot be converted to a string, then the string
"ognl.NoConversionPossible" is put into the list. It is wrong, we should pay
attention to the type of the list.
I have attached a patch that does not put elements into the list that cannot be
converted.
I have also attached a file that contains a simple example for this bug.
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