Metacat

package edu.ucsb.nceas.metacat.event;

import java.util.ArrayList;

import java.util.List;

public class MetacatEventService {

	private static MetacatEventService instance;

	private List<MetacatEventObserver> observers;

	private MetacatEventService() {

		observers = new ArrayList<MetacatEventObserver>();

	}

	public static MetacatEventService getInstance() {

		if (instance == null) {

			instance = new MetacatEventService();

		}

		return instance;

	}

	public void addMetacatEventObserver(MetacatEventObserver o) {

		observers.add(o);

	}

	public void removeMetacatEventObserver(MetacatEventObserver o) {

		observers.remove(o);

	}

	public void notifyMetacatEventObservers(MetacatEvent e) {

		for (MetacatEventObserver o: observers) {

			o.handleEvent(e);

		}

	}

}