that doesn't work either :-|. I need something that works on all
collections. Do i need a "<?>" somewhere probably?
On 11 Apr., 16:52, Magno Machado <magn...@gmail.com> wrote:
> Try this:
> class LoadMaps<E, T extends Collection<E> implements
> AsyncCallback<T> {
>
>
>
>
>
>
>
>
>
> On Mon, Apr 11, 2011 at 11:43 AM, tanteanni <tantea...@hotmail.com> wrote:
> > meanwhile i tried your suggestions but i am struggling at getting the
> > right signature:
> > so i want a callback working of all kinds of collections and adding
> > the result to the given collection:
>
> > at the moment i got this:
>
> > private class LoadMaps<T extends Collection> implements
> > AsyncCallback<T> {
> > private T target;
>
> > protected LoadMaps(T whereTo) {
> > target = whereTo;
> > }
>
> > @Override
> > public void onFailure(Throwable caught) {
> > Window.alert(caught.getMessage());
>
> > }
>
> > @Override
> > public void onSuccess(T result) {
> > target.addAll(result);
> > }
> > }
>
> > the only problem is now: i can't call the constructor:
> > Map<String, List<String>> myMap = new HashMap<String, List<String>>();
> > LoadMaps loadMaps = new LoadMaps(myMap);
>
> > -->"The constructor AdminUnits.LoadMaps(TaskDoneEvent,
> > Map<String,List<String>>) is undefined"
>
> > besides this i get "Type safety: The method addAll(Collection) belongs
> > to the raw type Collection. References to generic type Collection<E>
> > should be parameterized" in LoadMaps->onSuccess->target.addAll(result)
>
> > so how to fix this
>
> > On 11 Apr., 14:00, tanteanni <tantea...@hotmail.com> wrote:
> > > i am fairly new to gwt and struggling some how on "correct"/"nice" RPC
> > > implementation (it is working but code becomes ugly). On my first GWT
> > > based apps i often load some lists/data from db into front end. (Lists
> > > to be used in combo boxes for instance).
>
> > > so if i have a widget that needs 3 different lists (probably
> > > List<String> or Map<String, String>) i specify a service-method for
> > > each list. the problem is to load all those lists, i have to implement
> > > one class (...implements AsyncCallback) for each list.
> > > but the only difference between this implementations is that they load
> > > the result in different lists:
> > > public void onSuccess(){
> > > list1 = result
>
> > > }
>
> > > so how to implement an abstract callback class that could load its
> > > "result" into a given list/object (- a field of mother class)
>
> > > (if "call by reference" would exist in java i would giv "list1" as an
> > > parameter for constructor and onSucces would load the result into this
> > > reference?!)
>
> > > an optimal implementation would be if the result type could be a
> > > generic type: A class lie this:
>
> > > class GeneralCallback<T> implements AsyncCallback<T>{
> > > public GeneralCallback(T target){
> > > ...
>
> > > }
>
> > > public onSuccess(T result){
> > > target = result;
>
> > > }
> > > }
>
> > > is it possible to get such an abstract callback class?
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Google Web Toolkit" group.
> > To post to this group, send email to google-web-toolkit@googlegroups.com.
> > To unsubscribe from this group, send email to
> > google-web-toolkit+unsubscr...@googlegroups.com.
> > For more options, visit this group at
> >http://groups.google.com/group/google-web-toolkit?hl=en.
>
> --
> Magno Machado
> Paulohttp://blog.magnomachado.com.brhttp://code.google.com/p/emballo/
--
You received this message because you are subscribed to the Google Groups
"Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-web-toolkit?hl=en.
