[WICKET-4914] Component#setDefaultModelObject() in beforeRender throws Exception: "Cannot modify component hierarchy after render phase has started"

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 6.2.0
• Component/s: wicket
• Labels: component
• Assignee: Unassigned
• Reporter: Peter Parson
• Created: 06/Dec/12 14:50
• Updated: 14/Jan/13 10:50
• Resolved: 14/Jan/13 10:50

Description

Internally,
setDefaultModelObject()
calls
modelChanging()
calls
checkHierarchyChange()
which throws an exception when in render phase.

I do not think that changing a model's object is a change in hierarchy. (This is why I filed this as "bug".)
Otherwise getDefaultModel().setObject() should throw an exception also.
And why is setDefaultModelObject() behaving different from getDefaultModel().setObject() at all? (This I would actually call a "usability problem"... it looks like a convenience method, but does a lot of other things under the hood)

As it is quite confusing, maybe setDefaultModelObject() should be renamed to reflect the difference in behavior?