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https://issues.apache.org/jira/browse/WW-3762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215481#comment-13215481
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Lukasz Lenart commented on WW-3762:
-----------------------------------
Can someone review the patch ?
I've extracted few dedicated convertors from XWorkBasicConvertor to allow
override them by users. You can implement your own TypeConverter and register
it with struts.xml as follow:
{code:xml}
<bean type="com.opensymphony.xwork2.conversion.TypeConverter" name="collection"
class="com.project.MyCollectionConverter" scope="singleton"/>
{code}
If this is a good approach, I would like to extract all converters from
XWorkBasicConverter to all override them by users.
Also added Gabor's changes
> XWorkBasicConverter doConvertToCollection causes ClassCastException if an
> item cannot be converted
> --------------------------------------------------------------------------------------------------
>
> 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
> Assignee: Lukasz Lenart
> Labels: patch
> Fix For: 2.3.2
>
> Attachments: WW-3762.diff, WW-3762.patch, example.txt
>
>
> 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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