A utility for managing Event multicasting. Use it as an inline class like so:
specificEventMulticaster = new EventMulticaster() {
protected void dispatchEvent(SpecificListenerType listener, SpecificEventType event) {
listener.takeSpecificEvent(event);
}
};
Then use it like so:
specificEventMulticaster.dispatchEvent(new SpecificEvent());
Use the generics parameters to make it relatively type-safe.
A listener can only be registered once; adding one twice is the same as
adding it once.
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