/* Copyright (c) 2011 Danish Maritime Authority.
 
*
 
* Licensed under the Apache License, Version 2.0 (the "License");
 
* you may not use this file except in compliance with the License.
 
* You may obtain a copy of the License at
 
*
 
*
     
http://www.apache.org/licenses/LICENSE-2.0
 
*
 
* Unless required by applicable law or agreed to in writing, software
 
* distributed under the License is distributed on an "AS IS" BASIS,
 
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 
* See the License for the specific language governing permissions and
 
* limitations under the License.
 
*/
package dk.dma.ais.coverage.event;

import java.util.ArrayList;
import java.util.List;

/**
 
* Useful for listening for AIS events, just register a IAisEventListener. Other objects can broadcast events to listeners via
 
* broadcastEvent(AisEvent).
 
*
 
* Get access to this by calling ProjectHandler.getInstance()
 
*
 
*/

public final class EventBroadcaster {

    
private List<IAisEventListener> listeners = new ArrayList<IAisEventListener>();

    
public void broadcastEvent(AisEvent event) {
        
for (IAisEventListener listener : listeners) {
            
listener.aisEventReceived(event);
        
}
    
}

    
public void addProjectHandlerListener(IAisEventListener listener) {
        
listeners.add(listener);
    
}

    
// Singleton stuff
    
private static EventBroadcaster singletonObject;

    
private EventBroadcaster() {

    
}

    
public static synchronized EventBroadcaster getInstance() {
        
if (singletonObject == null) {
            
singletonObject = new EventBroadcaster();
        
}
        
return singletonObject;
    
}

    
public Object clone() throws CloneNotSupportedException {
        
throw new CloneNotSupportedException();
    
}
}