MockTimeSource.java
- By Robert C. Martin
- July 24, 2001
Uncle Bob's Agile Development Corner
Observer—Evolving into a pattern, Part 1
by Robert C. Martin
Listing 15. MockTimeSource.java.
import java.util.*;
public class MockTimeSource implements TimeSource
{
private Vector itsObservers = new Vector();
public void setTime(int hours, int minutes, int seconds)
{
Iterator i = itsObservers.iterator();
while (i.hasNext())
{
ClockObserver observer = (ClockObserver) i.next();
observer.update(hours, minutes, seconds);
}
}
public void registerObserver(ClockObserver observer)
{
itsObservers.add(observer);
}
}
About the Author
Robert C. Martin is president of Object Mentor Inc., a firm that offers high-level, OO software design consulting, training, and development services. He is the author of Designing Object Oriented C++ Applications Using the Booch Method. He can be contacted at [email protected].