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https://issues.apache.org/jira/browse/WICKET-4041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13102217#comment-13102217
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Craig P. Motlin commented on WICKET-4041:
-----------------------------------------
That changes the return type.
IModel<Collection<? extends MyDomainObject>> model =
Model.of(MyApplication.get().getMyDomainObjects());
Besides the wildcard in the return type, it's no longer a Model<List>, which
means it no longer works with a ListView.
> In Model<T>, the type T should not extend Serializable.
> -------------------------------------------------------
>
> Key: WICKET-4041
> URL: https://issues.apache.org/jira/browse/WICKET-4041
> Project: Wicket
> Issue Type: Improvement
> Components: wicket
> Affects Versions: 1.5-RC7
> Reporter: Craig P. Motlin
> Assignee: Igor Vaynberg
>
> The problem is that lots of common interfaces (like List) don't implement
> Serializable even though most/all of their subclasses are in fact
> serializable. That means clients wind up with code containing potentially
> unsafe casts like this.
> Model<ArrayList<MyDomainObject>> listModel = new
> Model<ArrayList<MyDomainObject>>()
> {
> @Override
> public ArrayList<MyDomainObject> getObject()
> {
> return (ArrayList<MyDomainObject>)
> DominionApplication.get().getMyDomainObjects();
> }
> };
> It still makes sense for Model to check that the type is an instanceof
> Serializable at runtime, but it's too much to enforce at compile time.
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