Serban,
I really wouldn't trying and mess with detachable models unless you were
dealing with 100s of individual Strings that were climbing up beyond 4k each
or something like that -- if you are literally talking about UI labels, that
is so few bytes that leaving them static references is going to far
out-weigh the extra byte code written to try and manage loading them each
time they are needed, even if it's from something fast like a local
properties file.
As for your last question, I think the answer is "yes" -- a stateful page is
a page that maintains state -- some dynamic state based on something the
user has done. In the case of a static label, there is no *state*. The label
"Username" always is the label "Username" no matter what, so it's not
stateful.
That's my 2 cents atleast.
On Tue, Feb 23, 2010 at 2:08 AM, Serban Balamaci <serban.balam...@asf.ro>wrote:
>
> Yes you are right, if we set the variable in the constructor but make it
> null
> on detach, we will not have it on getObject on next render, so we need to
> keep a reference to it. I guess the only choice would be to the
> LoadableDetachableModel, which could be thought detrimental for code
> clearness outweighing the storage impact, maybe would make sense maybe for
> a
> large string - for ex. setting some generated javascript on a label.
> But is a page consider stateless if we only have this static string ending
> in the page store?
>
>
> bgooren wrote:
> >
> > Well, a couple of strings more or less usually don't make that much of a
> > difference. I personally prefer to save some typing and have better
> > readability then to save a few bytes here and there.
> >
> > Furthermore, if you were to create an implementation of IModel
> > specifically for this case, you would always need to store the string as
> > an instance variable, thus creating the "problem" you are trying to
> solve.
> >
> >
> > Serban Balamaci wrote:
> >>
> >> Hello.
> >> I've always used
> >> add(new Label("alabel", new Model("A message")); - does this not save
> the
> >> "A message" string in the page store?
> >> Is it not better to do add(new Label("alabel", new
> >> LoadableDetachableModel<String>() {
> >>
> >> @Override
> >> protected String load() {
> >> return "A message";
> >> }
> >> })); - while this option does not save it in the page store.
> >> Is it because of the coding amount that nobody is using this? I guess
> not
> >> because we could extend IModel and create a "label model" with a string
> >> property that is cleared on detach.
> >>
> >>
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> >>
> >
> >
>
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