You could reduce the verbosity by combining all your dynamic content
(anything you would normally add when subclassing a component) into a
separate class. For example:
class Images
{
Callable<Boolean> isVisible()
{
...
}
Callable<Integer> getItemsPerPage()
{
...
}
}
main()
{
DataView<Image> images = DataView.create(); // factory method
Images imageState = new Images();
images.setItemsPerPage(imageState.getItemsPerPage());
images.setVisible(imageState.isVisible());
...
}
Gili
Matej Knopp-2 wrote:
>
> Apart from the fact that this would be even more verbose than current
> generics approach this would probably also radically increase
> component memory footprint.
>
> -Matej
>
> On Thu, Jun 12, 2008 at 7:03 AM, cowwoc <[EMAIL PROTECTED]> wrote:
>>
>>
>> Have you considered moving from subclassing to composition in Wicket
>> using
>> Callable<T>?
>>
>> Currently it is quite common for developers to subclass a component in
>> order
>> to override isVisible() and other properties. I am proposing that instead
>> the component classes become final and properties may only be set using
>> setter methods. The setter methods would take Callable<T> instead of T,
>> so
>> for example setVisible(boolean) would become
>> setVisible(Callable<Boolean>)
>>
>> The benefit of this approach is that you could introduce static factory
>> methods to the Wicket components which would make them much easier to use
>> in
>> their Generic form. You could then introduce various helper classes to
>> create Callable<T> for constant values, such as Callable.valueOf(true)
>> would
>> return a Callable<Boolean> that always returns true.
>> --
>> View this message in context:
>> http://www.nabble.com/users%2C-please-give-us-your-opinion%3A-what-is-your-take-on-generics-with-Wicket-tp17589984p17792488.html
>> Sent from the Wicket - User mailing list archive at Nabble.com.
>>
>>
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