On Nov 7, 2007 5:13 PM, John Krasnay <[EMAIL PROTECTED]> wrote:
> You've just illustrated one of the major problems with the
> panel-from-a-subclass approach: it's easy to get it wrong. In your
> example, addAbstract1 and addAbstract2 will be called in a class whose
> constructor has not yet been called. Consider:
>
> public DerivedPage extends BasePage {
>
> private String name;
>
> public DerivedPage(String name) {
> super();
> this.name = name;
> }
>
> public abstract addAbstract1(String abstractId1) {
> add(new NamePanel(abstractId1, name));
> }
> }
>
> This code is broken, since you're constructing NamePanel before name has
> been initialized. Someone later in this thread shows a better way to do
> this, by calling the overridable methods from onBeforeRender. But this
> is also tricky; because onBeforeRender can be called multiple times you
> must maintain a flag to ensure you only add your panels once.
>
> Given these subtle problems with this approach, I admit I'm warming to
> the multiple extend/child idea.
I stand corrected! :)
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