Hi,
here comes my example:
class MyWizard extends Wizard{
private String tempfile;
...
private final class Step1 extends WizardStep {
//uploads file to some temp-folder + sets the tempfile name
}
private final class Step2 extends WizardStep {
//Shows a summary Page + confirm button +
//a link to delete the temp file that was uploaded in Step1
public Step2(){
......
--> is the following line ok???
add(new Label("file", new PropertyModel(MyWizard.this, "tempfile" ) )
);
add(new Link("delete")
{
public void onClick()
{
final File file = new File( MyWizard.this.tempfile );
Files.remove(file);
MyWizard.this.info("Deleted " + file);
}
});
}
}
}
Thanks!
-Marcus
2007/10/12, Igor Vaynberg <[EMAIL PROTECTED]>:
>
> it is still an issue if you pass such a model between pages. i dont see
> why
> you would need an anonymous model instance.
>
> -igor
>
>
> On 10/12/07, marcus dickerhof <[EMAIL PROTECTED]> wrote:
> >
> > Hi,
> > I am quite new to wicket, and I want to avoid making serious mistakes
> :-)
> > On the Bestpractices and gotachs page:
> > http://cwiki.apache.org/WICKET/best-practices-and-gotchas.html
> > I found the following statement from Martijn Dashorst:
> >
> > --START
> > The other thing to avoid is anonymous or nested instances of IModel.
> > Usually
> > you share an instance of a model between two page instances. If you
> create
> > an anonymous or nested instance of IModel, then you automatically get a
> > 'this' reference to the class that surrounds it. This will usually be
> the
> > page, but can also be the form or a listview. Anyway, because the
> > reference
> > is /final/, you will copy that reference to the old page, with the model
> > to
> > the new page, thus duplicating the component tree (it gets versioned
> > etc.).
> > This will eventually lead to OutOfMemoryError.
> >
> > Search in the mailinglist for outofmemoryerror for other descriptions of
> > this behaviour. I doubt that I have done the subject justice.
> >
> > --END
> >
> > Is this still an issue? And how would I do a
> > workaround? Where can I find more infos concerning this problem?
> >
> >
> > Thanks a lot!
> >
> > Best regards
> > Marcus
> >
>
