-Igor
On 11/20/05, Juergen Donnerstag <[EMAIL PROTECTED]> wrote:
As Igor mentioned. It is completely fine to use. Nothing wrong with it.
Juergen
On 11/20/05, Andrew Lombardi <[EMAIL PROTECTED]> wrote:
> So, I see all this talk of using static factory methods to generate a
> Page, but what would be wrong with just using
>
> add(new Link("myLink") {
> public void onClick() {
> setResponsePage(new MyPage(param1, param2, param3));
> }
> };
>
> this looks like it ensures that the page doesn't get created until
> the link is clicked (avoiding the stack overflow problem), and it
> avoids usage of PageParameters (which harken me back to MVC
> frameworks anyway (ick!))...
>
> is that right?
>
>
> On Nov 18, 2005, at 3:19 PM, Eduardo Rocha wrote:
>
> > Yeah, I just forgot IPageLink and PageLink (by the way these names can
> > be quite confusing!), so ignore my classes, but I keep my point :P.
> >
> > 2005/11/18, Igor Vaynberg <[EMAIL PROTECTED]>:
> >> Actually what i meant was a simple static factory method that
> >> translates
> >> strongly typed params into PageParameters.
> >>
> >> ie
> >>
> >> class MyBookmarkablePage extends WebPage {
> >> public MyBookmarkablePage(PageParameters params) {
> >> ...
> >> }
> >> public static MyBookmarkablePage(String p1, int p2, String p3) {
> >> PageParameters params=new PageParameters();
> >> ...fill in params...
> >> return new MyBookmarkablePage(params);
> >> }
> >> }
> >>
> >> also see IPageLink interface that is used by PageLink class. but i
> >> think
> >> this is more work, a simple Link's onclick() implementation is the
> >> path of
> >> least resistance imho.
> >>
> >> -Igor
> >>
> >>
> >>
> >> On 11/18/05, Eduardo Rocha <[EMAIL PROTECTED]> wrote:
> >>>
> >>> If it's OK to write a little more code, you could use a factory for
> >>> the page with the same signature your constructor uses. In my
> >>> opinion
> >>> this could be more elegant, but what Igor said is simpler. Something
> >>> like (not tested):
> >>>
> >>> // reusable class
> >>> public interface IPageCreator {
> >>> Page newInstance();
> >>> }
> >>>
> >>> // reusable class
> >>> public class PageCreatorLink extends Link {
> >>> public PageCreatorLink(String id, IPageCreator creator) {
> >>> super(id);
> >>> this.creator = creator;
> >>> }
> >>> public void onClick() {
> >>> setResponsePage(creator.newInstance());
> >>> }
> >>> }
> >>>
> >>> // your class
> >>> public class MyPageCreator implements IPageCreator {
> >>> public MyPageCreator(Object provided) {
> >>> this.provided = provided;
> >>> }
> >>> public Page newInstance() {
> >>> return new MyPage(provided);
> >>> }
> >>> }
> >>>
> >>> // your class
> >>> add(new PageCreatorLink("cancelLink", new MyPageCreator(provided));
> >>>
> >>> maybe your page class could also be the IPageCreator, serving like a
> >> prototype:
> >>>
> >>> // your class
> >>> public class MyPage extends WebPage implements IPageCreator {
> >>> ....
> >>> }
> >>>
> >>> The factory would be nice when you have to execute some service
> >>> method
> >>> before rendering the page, so you would have more clearly separated
> >>> responsabilities, i.e., the factory would be responsible for calling
> >>> the service and the page would act just for the view. That way your
> >>> classes would be more testable too.
> >>>
> >>> 2005/11/18, Igor Vaynberg <[EMAIL PROTECTED]>:
> >>>> imho that is the best practice. that is what i use whenever i do
> >>>> not
> >> need a
> >>>> bookmarkable page. i have yet to use the PageLink class.
> >>>> PageLink makes
> >> it
> >>>> easier to create links to pages because it lets you specify the
> >>>> class
> >> name
> >>>> of the page or the created page instance. This is ok for pages
> >>>> that are
> >> not
> >>>> bookmarkable and take no parameters, but most of the time that
> >>>> is not
> >> the
> >>>> case in my experience.
> >>>>
> >>>> if you work with bookmarkable pages a lot, a static factory
> >>>> method that
> >>>> fills in pageparameters can help with type safety and forgotten
> >>>> params.
> >>>>
> >>>> -Igor
> >>>>
> >>>>
> >>>>
> >>>> On 11/18/05, Gustavo Hexsel <[EMAIL PROTECTED]> wrote:
> >>>>> Hi all,
> >>>>>
> >>>>> I wanted to know what's the best way to use Links (PageLinks,
> >>>> BookmarkablePageLinks).
> >>>>>
> >>>>> In the beginning, I was using BookmarkablePageLink's and
> >>>>> converting
> >>>> everything to and from Strings. That obviously was flawed, as I
> >>>> was
> >> using
> >>>> string names and passing them back and forth (lost strong-typing,
> >>>> occasionally forgot one parameter, or mistyped the name of it).
> >>>> It also
> >>>> made me reload objects from the database even though I had them
> >>>> handy on
> >> the
> >>>> calling class.
> >>>>>
> >>>>> Then I tried using PageLink's, passing a "new
> >>>> XXXPage(whateverparameter)" in the constructor. That didn't work
> >> either, as
> >>>> pages have links back and forth, leading to stackoverflows.
> >>>>>
> >>>>> Then I moved one step up in the object hierarchy and started
> >>>>> using
> >>>> Link's, but it seems such red tape for each link having to write:
> >>>>> add(new Link("cancelLink") {
> >>>>> public void onClick() { setResponsePage(new
> >>>> EditProviderPage(provider)); };
> >>>>> });
> >>>>>
> >>>>> Any suggestions?
> >>>>>
> >>>>>
> >>>>> []s Gus
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
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