[ http://issues.apache.org/struts/browse/WW-1495?page=all ]
Ted Husted updated WW-1495:
---------------------------
Flags: [Patch]
> Some actions that use Generics make OGNL throw ClassCastException
> -----------------------------------------------------------------
>
> Key: WW-1495
> URL: http://issues.apache.org/struts/browse/WW-1495
> Project: Struts 2
> Issue Type: Bug
> Components: Actions, Expression Language
> Affects Versions: 2.0.1
> Environment: Kubuntu Linux 6.06 and 6.10 running Eclipse 3.2 with Web
> Tools with an Apache Tomcat 5.5 integrated into the IDE.
> Reporter: Vitor Souza
> Fix For: Future
>
> Attachments: OgnlIssue.war, OgnlIssue.zip, OgnlRuntime.java
>
>
> When the action class extends a class that uses generics (e.g. public class
> ManageEmployeeAction extends CrudAction<Employee, Long> { }) and data is sent
> from the web page (using Struts Forms built by the tag library) to be set in
> a property from the class that is inherited from the superclass and defined
> as generic (e.g., protected I[] ids;), OGNL cannot determine the type of the
> property, falls back to String[] and throws a ClassCastException.
> This issue has been further discussed in the forum:
> http://forums.opensymphony.com/thread.jspa?threadID=48752. Attachments are
> provided to illustrate the issue and propose a starting point for the fix.
> However, it should NOT be considered a patch, since the creator of this
> "hack" doesn't have enough knowledge of OGNL and Generics to assure its
> general correctness.
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