diff options
Diffstat (limited to 'EssentialsUpdate/src/f00f/net/irc/martyr/ForwardObservable.java')
-rw-r--r-- | EssentialsUpdate/src/f00f/net/irc/martyr/ForwardObservable.java | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/EssentialsUpdate/src/f00f/net/irc/martyr/ForwardObservable.java b/EssentialsUpdate/src/f00f/net/irc/martyr/ForwardObservable.java new file mode 100644 index 000000000..7f4d8d89a --- /dev/null +++ b/EssentialsUpdate/src/f00f/net/irc/martyr/ForwardObservable.java @@ -0,0 +1,66 @@ +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); + } + } + } + + +} + |