UIBean and "#attr.theme" conflicts with el scoped variables w/ same name
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Key: WW-2366
URL: https://issues.apache.org/struts/browse/WW-2366
Project: Struts 2
Issue Type: Bug
Affects Versions: 2.0.11
Reporter: Bob Tiernay
Assignee: Don Brown
In org.apache.struts2.components.UIBean the following lines:
573 // If theme set is not explicitly given,
574 // try to find attribute which states the theme set to use
575 if ((theme == null) || (theme.equals(""))) {
576 theme = (String) stack.findValue("#attr.theme");
577 }
Cause problems if the following jsp snippet exists above a UIBean extended tag
in the current page:
<s:set name="theme" value="theme" scope="page" />
This causes a class cast exception if the type of the page scoped variable is
not a string.
The proposed fix would be either:
1. Perform an instanceof check to ensure that the value is a string (better)
2. avoid #attr.theme altogether and use another entry in the value stack (best)
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