48 lines
1.2 KiB
Java
48 lines
1.2 KiB
Java
package de.mrbesen.telegram.event;
|
|
|
|
import de.mrbesen.telegram.TelegramAPI;
|
|
|
|
import java.lang.reflect.Array;
|
|
import java.lang.reflect.Method;
|
|
import java.util.ArrayList;
|
|
import java.util.HashMap;
|
|
|
|
public class EventManager {
|
|
|
|
private HashMap<Class<? extends Event>, ArrayList<EventListener>> listeners = new HashMap<>();
|
|
|
|
public EventManager() {}
|
|
|
|
public void registerEvent(Class<? extends Event> eventtype, EventListener listener) {
|
|
if (listener == null) {
|
|
throw new NullPointerException();
|
|
}
|
|
|
|
//get list
|
|
ArrayList<EventListener> list = listeners.get(eventtype);
|
|
if (list == null) {
|
|
list = new ArrayList<EventListener>();
|
|
listeners.put(eventtype, list);
|
|
} else if(list.contains(listener)) {
|
|
throw new IllegalArgumentException("listener allready registered");
|
|
}
|
|
|
|
list.add(listener);
|
|
}
|
|
|
|
public Event callEvent(Event e) {
|
|
if(e == null)
|
|
throw new NullPointerException("event is not allowed to be null!");
|
|
ArrayList<EventListener> listner = listeners.get(e.getClass());
|
|
for(EventListener listn : listner) {
|
|
try {
|
|
listn.handleEvent(e);
|
|
} catch(Throwable t) {
|
|
System.err.println("Error occurred on Handling Event: " + e.getClass().getSimpleName());
|
|
t.printStackTrace();
|
|
}
|
|
}
|
|
return e;
|
|
}
|
|
}
|