Vojtech Szocs has posted comments on this change.

Change subject: frontend: refactoring: Generify Events and Listeners
......................................................................


Patch Set 11:

(1 comment)

Nice patch, just one comment (inline).

Maybe it was discussed before, though.

http://gerrit.ovirt.org/#/c/32837/11/frontend/webadmin/modules/uicompat/src/main/java/org/ovirt/engine/ui/uicompat/IEventListener.java
File 
frontend/webadmin/modules/uicompat/src/main/java/org/ovirt/engine/ui/uicompat/IEventListener.java:

Line 1: package org.ovirt.engine.ui.uicompat;
Line 2: 
Line 3: public interface IEventListener<T extends EventArgs> {
Line 4:     void eventRaised(Event<? extends T> ev, Object sender, T args);
I don't think that "? extends T" is appropriate here, it could be simply:

 void eventRaised(Event<T> ev, Object sender, T args);

eventRaised method is *not* meant to be called by user code, so what's the 
reason for having "? extends T" here?

Personally I think that "? extends T" just pollutes the API, for example this:

 getPropertyChangedEvent().addListener(new 
IEventListener<PropertyChangedEventArgs>() {
   @Override
   public void eventRaised(Event<? extends PropertyChangedEventArgs> ev, Object 
sender, PropertyChangedEventArgs args) {
     ...
  }
});

Is practically the same thing as this:

 getPropertyChangedEvent().addListener(new 
IEventListener<PropertyChangedEventArgs>() {
   @Override
   public void eventRaised(Event<PropertyChangedEventArgs> ev, Object sender, 
PropertyChangedEventArgs args) {
     ...
  }
});

Therefore I see no practical reason for having "? extends T" as part of 
eventRaised method signature.


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Gerrit-MessageType: comment
Gerrit-Change-Id: Icddf5780c00c985966e6ae956a401c3ede6a68e7
Gerrit-PatchSet: 11
Gerrit-Project: ovirt-engine
Gerrit-Branch: master
Gerrit-Owner: Martin Betak <[email protected]>
Gerrit-Reviewer: Alexander Wels <[email protected]>
Gerrit-Reviewer: Daniel Erez <[email protected]>
Gerrit-Reviewer: Greg Sheremeta <[email protected]>
Gerrit-Reviewer: Lior Vernia <[email protected]>
Gerrit-Reviewer: Martin Betak <[email protected]>
Gerrit-Reviewer: Tomas Jelinek <[email protected]>
Gerrit-Reviewer: Vojtech Szocs <[email protected]>
Gerrit-Reviewer: [email protected]
Gerrit-Reviewer: oVirt Jenkins CI Server
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