My quick example isn't real and perhaps a bit misleading. Actually there is
nothing special about MyModel, its just a POJO that I am wrapping up in a
detachable model. Maybe I misunderstood what you were trying to tell me.
/** Specialization of MyPage that gets the POJO from a database. */
public class MyRDBMSPage extends MyPage {
public MyPOJO getMyPOJO() {
// go get the POJO from the database
}
....
}
/** Specialization of MyPage that gets the POJO from a file. */
public class MyFilePage extends MyPage {
public MyPOJO getMyPOJO() {
// go get the POJO from the filesystem
}
....
}
/** Abstract MyPage that doesn't care where the POJO came from (database or
file). */
public abstract class MyPage extends WebPage {
public abstract MyPOJO getMyPOJO();
public onInitialize() {
this.add(new MyPanel("myPanel", this.getMyPOJO()));
....
}
}
/** Panel that has the detachable model. */
public class MyPanel {
public MyPanel(String id, MyPOJO pojo) {
MyDetachableModel mdl = new MyDetachableModel(pojo);
this.add(new CheckBox("myCheckbox", new PropertyModel(mdl,
"isSelected"));
....
}
}
/** Detachable model that needs access to the page. */
public class MyDetachableModel extends LoadableDetachableModel<MyPOJO> {
private transient MyPOJO myPOJO;
public MyDetachableModel(MyModel pojo) {
// maybe store something from the POJO to help me retrieve the
// POJO in the load method????
// I could store a transient reference but that is no good
beyond the initial page
// render
this.myPOJO = pojo;
}
protected MyPOJO load() {
// if I had access to the page I could get the pojo from
there but
// it doesn't appear to be available at the point when load
is called.
return [GET MY PAGE HERE SOMEHOW].getMyPOJO();
}
}
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