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Posted to issues@struts.apache.org by "Lukasz Lenart (Jira)" <ji...@apache.org> on 2022/06/16 09:08:00 UTC

[jira] [Closed] (WW-2333) ValueStackDataSource implementation leads to class cast exceptions

     [ https://issues.apache.org/jira/browse/WW-2333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lukasz Lenart closed WW-2333.
-----------------------------
    Fix Version/s:     (was: 6.1.0)
       Resolution: Won't Do

> ValueStackDataSource implementation leads to class cast exceptions
> ------------------------------------------------------------------
>
>                 Key: WW-2333
>                 URL: https://issues.apache.org/jira/browse/WW-2333
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Plugin - JasperReports
>    Affects Versions: 2.0.11
>            Reporter: Thorsten Schäfer
>            Priority: Major
>
> Assume you have a class Foo that has a Collection of Bar's. Without using Struts, the expected behavior of a report that takes Foo's as input is, that a reference $F{bar} returns a java.util.Collection (of Bar's). However, this will not be the case when using the ValueStackDataSource implementation; an instance of ValueStackDataSource is returned instead of a collection. If the method "getFieldValue" gets called, it checks if the field value is iteratable (which is true for collections) and then returns a new ValueStackDataSource instead of the field value itself. I assume that this behavior breaks many reports.



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