Hi,
I aggree with Sven. Another option is to pass the panel to the LDM's
contructor so you can do a panel.getPage() to get the page. Just cast to
the appropriate page type and do yourpage.getMyModel().
Best regards,
Sebastien.
On Wed, May 30, 2012 at 10:32 PM, Sven Meier <s...@meiers.net> wrote:
> > public MyPanel(String id, MyModel model) {
>
> That looks suspicious, why should MyPanel require a specific model
> implementation?
>
> What's so special about your MyModel? Is it a Wicket model, i.e.
> implements IModel?
> If yes, then the constructor should look like this:
>
> public MyPanel(String id, IModel<Foo> model) {
>
> If not, the following would be my suggestion:
>
> public MyPanel(String id, IModel<MyModel> model) {
>
> Hope this helps
> Sven
>
>
> On 05/30/2012 10:22 PM, gmparker2000 wrote:
>
>> I have a situation where I need to access the page from the load method
>> of a
>> loadableDetachableModel. The loadableDetachableModel is used deep down
>> on a
>> panel that needs access to the page in order to access the model object.
>> To
>> complicate things this page is abstract and can be extended to provide
>> access to the model differently (i.e. from a database, or from a file).
>> It
>> kind of looks like this (only more complicated in my case):
>>
>> /** Specialization of MyPage that gets the model from a database. */
>> public class MyRDBMSPage extends MyPage {
>> public MyModel getMyModel() {
>> // go get the model from the database
>> }
>> ....
>> }
>>
>> /** Specialization of MyPage that gets the model from a file. */
>> public class MyFilePage extends MyPage {
>> public MyModel getMyModel() {
>> // go get the model from the filesystem
>> }
>> ....
>> }
>>
>> /** Abstract MyPage that doesn't care where the model came from (database
>> or
>> file). */
>> public abstract class MyPage extends WebPage {
>> public abstract MyModel getMyModel();
>>
>> public onInitialize() {
>> this.add(new MyPanel("myPanel", this.getMyModel()));
>> ....
>> }
>> }
>>
>> /** Panel that has the detachable model. */
>> public class MyPanel {
>> public MyPanel(String id, MyModel model) {
>> MyDetachableModel mdl = new MyDetachableModel(model);
>> this.add(new CheckBox("myCheckbox", new PropertyModel(mdl,
>> "isSelected"));
>> ....
>> }
>> }
>>
>> /** Detachable model that needs access to the page. */
>> public class MyDetachableModel extends LoadableDetachableModel<**MyModel>
>> {
>> private transient MyModel myModel;
>>
>> public MyDetachableModel(MyModel model) {
>> // maybe store something from the model to help me retrieve
>> the
>> // model in the load method????
>>
>> // I could store a transient reference but that is no good
>> beyond the initial page
>> // render
>> this.myModel = model;
>> }
>>
>> protected MyModel load() {
>> // if I had access to the page I could get the model from
>> there but
>> // it doesn't appear to be available at the point when
>> load
>> is called.
>> return [GET MY PAGE HERE SOMEHOW].getMyModel();
>> }
>> }
>>
>> It would be great to be able to do this so that different variations on a
>> single page could be created easily. Perhaps I am overlooking something
>> or
>> over complicating this. We are also using spring so it is possible to
>> inject (@SpringBean) a bean into the detachable model that provides access
>> to the model but I'd rather avoid this as I think it complicates something
>> that should be quite simple.
>>
>> Maybe its just me but I'm finding loadableDetachableModel to be quite
>> challenging for my purposes, which are not typically just loading database
>> entities. Serializing a key piece of information instead of the model
>> makes
>> sense and seems rather straightforward but I struggle not with the stuff
>> getting serialized but rather the object that is needed to operate on the
>> key information to get the model back (i.e a business object, entity
>> manager, etc).
>>
>> If anyone can show me where I'm going wrong I'd appreciate the help
>>
>> thanks
>>
>> --
>> View this message in context: http://apache-wicket.1842946.**
>> n4.nabble.com/Access-to-Page-**from-LoadableDetachableModel-**
>> tp4649586.html<http://apache-wicket.1842946.n4.nabble.com/Access-to-Page-from-LoadableDetachableModel-tp4649586.html>
>> Sent from the Users forum mailing list archive at Nabble.com.
>>
>> ------------------------------**------------------------------**---------
>> To unsubscribe, e-mail:
>> users-unsubscribe@wicket.**apache.org<users-unsubscr...@wicket.apache.org>
>> For additional commands, e-mail: users-h...@wicket.apache.org
>>
>>
>
> ------------------------------**------------------------------**---------
> To unsubscribe, e-mail:
> users-unsubscribe@wicket.**apache.org<users-unsubscr...@wicket.apache.org>
> For additional commands, e-mail: users-h...@wicket.apache.org
>
>
