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https://issues.apache.org/jira/browse/WICKET-4353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13192159#comment-13192159
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Sven Meier commented on WICKET-4353:
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There are several solutions how to detect the selected choice:
1) use a custom ChoiceRenderer (no longer available with 1.5.4)
2) override AbstractSingleSelectChoice#getModelValue()
3) make sure the selected choice is the identical object contained in the
choices list (e.g. via OpenSessionInView)
I think 1) was a nice and easy solution so far.
@Igor:
You've implemented a different solution in
92dec6995318444eb831c49b350a6b03b89e0962, utiliizing the choiceRenderer and
#isSelected(). Why did you revert this change?
> Choice is not rendered as selected on different instances semantically equal
> ----------------------------------------------------------------------------
>
> Key: WICKET-4353
> URL: https://issues.apache.org/jira/browse/WICKET-4353
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.5.4
> Environment: windows, jdk1.6
> Reporter: Per Newgro
> Labels: DropDownChoice
> Attachments: ddcbug.zip
>
>
> With 1.5.4 there was a change in
> org.apache.wicket.markup.html.form.AbstractSingleSelectChoice.java
> Sven stated in list that: "Igor's commit statements says "improved
> inconsistency handling in choice components".
> This change prevents IChoiceRenderer#getIdValue() being called with -1 as the
> index argument. ".
> It is defenitly a comprehensible change. But the effect is (for me) quite
> heavy.
> If you don't overwrite equals in selectable objects then two semantically
> equal instances will not be rendered as
> selected because of the different physical instances. But it worked in 1.5.3.
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