Change By:

yi gong (06/Nov/12 3:20 AM)

Description:

The equals() implementation is incorrect

@Override
    public boolean equals(Object obj) {
        return this == obj || delegate().equals(obj);
    }

if the obj is a WeldMethodExpression, it returns false which cause add duplicated Listener
Please see Mojarra
javax.faces.componentUIComponentBase
    public void subscribeToEvent(Class<? extends SystemEvent> eventClass,
                                 ComponentSystemEventListener componentListener) {
...
        if (!listenersForEventClass.contains(facesLifecycleListener)) {
            listenersForEventClass.add(facesLifecycleListener);
        }

    }

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