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?
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