[WICKET-1270] NPE in ListMultipleChoice.updateModel()

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0-final
• Fix Version/s: 1.3.1
• Component/s: wicket
• Assignee: Unassigned
• Reporter: Thomas Jaeckle
• Created: 09/Jan/08 10:57
• Updated: 14/Jan/08 06:42
• Resolved: 14/Jan/08 06:42

Description

I noticed a NullPointerException when I cleared a Form with a ListMultipleChoice to its original state.
In updateModel() following statement causes a NPE when something was selected in the multiple select but in the original state nothing was selected:

selectedValues.addAll((Collection)getConvertedInput());

getConvertedInput() is null, so ArrayList.addAll() operates on the null value and throws the NPE.