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package f00f.net.irc.martyr;
import java.util.Observer;
import java.util.Observable;
import java.util.LinkedList;
import java.util.List;
/**
* Does notifications in the order they are added.
* */
public class ForwardObservable extends Observable
{
private boolean changed = true;
private List<Observer> obs = new LinkedList<Observer>();
private final Object localMonitor = new Object();
public void setChanged()
{
synchronized(localMonitor)
{
changed = true;
}
}
protected void clearChanged()
{
synchronized(localMonitor)
{
changed = false;
}
}
public void addObserver( Observer o )
{
synchronized(localMonitor)
{
obs.add( o );
}
}
public void deleteObserver( Observer o )
{
synchronized(localMonitor)
{
obs.remove( o );
}
}
public void notifyObservers(Object arg)
{
synchronized(localMonitor)
{
if (!changed)
return;
clearChanged();
for (Observer ob : obs) {
ob.update(this, arg);
}
}
}
}
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