You can use spring to inject the service, using @SpringBean and
calling in the constructor InjectorHolder.getInjector().inject(this);
(or use salve)
Service locator is also a possibility. That is why we left it open :)
Martijn
On Mon, Jul 27, 2009 at 2:20 PM, David Chang<david_q_zh...@yahoo.com> wrote:
>
> Hello, I am reading <<Wicket in Action>> to learn Wicket. The example on Page
> 99 is about teaching detachable models. Here it goes:
>
> -----------
> public class CheeseModel extends Model {
> private Long id;
> private transient Cheese cheese;
> public CheeseModel() {
> }
> public CheeseModel(Cheese cheese) {
> setObject(cheese);
> }
> public CheeseModel(Long id) {
> this.id = id;
> }
> �...@override
> public Object getObject() {
> if(cheese != null) return cheese;
> if(id == null ) {
> cheese = new Cheese();
> } else {
> CheeseDao dao = ...
> cheese = dao.getCheese(id);
> }
> return cheese;
> }
> �...@override
> public void setObject(Object object) {
> this. cheese = (Cheese)object;
> id = (cheese == null) ? null : cheese.getId();
> }
> �...@override
> public void detach() {
> this. cheese = null;
> }
> }
> -----------
>
> I would like to know how dao is obtained as indicated as follows:
>
> CheeseDao dao = ...
>
> Use a locator pattern? Or should I let CheeseModel extend a custom model in
> which dao is set via Spring? Does the latter way create more memory
> footprint? What are the effective ways of getting DAO avaiable to wicket
> models?
>
> Thanks for your input!
>
> Cheers!
>
>
>
>
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