Hello,
I am trying to build an implementation of the Set interface that notifies
registered handlers when a modification occurs on the Set.
First of all, has this already been done somewhere?
I couldn't find anything, so I went on to build my own. The issue I have is
that, when the Change event is fired, the handlers are not notified.
My code is as follows:
public class NotifyingSet<T> extends Composite implements
HasCollectionChangeHandlers<T>, Set<T> {
private final Set<T> wrappedSet;
public NotifyingSet() {
this.wrappedSet = new HashSet<T>();
}
@Override
public boolean add(final T e) {
final boolean ret = this.wrappedSet.add(e);
this.fireEvent(new CollectionChangeEvent<T>(Operation.ADD, e));
return ret;
}
...
}
--------------------
public interface HasCollectionChangeHandlers<T> {
HandlerRegistration
addCollectionChangeHandler(CollectionChangeEventHandler<T> handler);
}
-------------------
In my presenter, I do this:
// Also tried with GWT.create()
private final NotifyingSet<FightRequest> fightRequests
= new NotifyingSet<FightRequest>();
this.registerHandler(this.fightRequests
.addCollectionChangeHandler(new
CollectionChangeEventHandler<FightRequest>() {
@Override
public void onCollectionChange(final FightRequest
element,
final
com.fiveorbs.client.events.CollectionChangeEventHandler.Operation operation)
{
logger.info("on collection change")
}
}));
...
fightRequests.add(someobject);
----------------
After the add, I would expect my handler to be called, but to no avail.
Would you have any idea as to what I'm doing wrong?
Thanks,
--
Sébastien Tromp
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