package net.jcip.examples;

/**

* SafeListener

* <p/>

* Using a factory method to prevent the this reference from escaping during construction

*

* @author Brian Goetz and Tim Peierls

*/

public class SafeListener {

private final EventListener listener;

private SafeListener() {

listener = new EventListener() {

public void onEvent(Event e) {

doSomething(e);

}

};

}

public static SafeListener newInstance(EventSource source) {

SafeListener safe = new SafeListener();

source.registerListener(safe.listener);

return safe;

}

void doSomething(Event e) {

}

interface EventSource {

void registerListener(EventListener e);

}

interface EventListener {

void onEvent(Event e);

}

interface Event {

}

}