1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/openfixed/src/org/apidesign/openfixed/PostEventSupport.java	Sun Mar 20 18:52:47 2011 +0100
     1.3 @@ -0,0 +1,78 @@
     1.4 +package org.apidesign.openfixed;
     1.5 +
     1.6 +import java.util.HashSet;
     1.7 +import java.util.List;
     1.8 +import java.util.Set;
     1.9 +import java.util.concurrent.CopyOnWriteArrayList;
    1.10 +import java.util.concurrent.Executor;
    1.11 +import java.util.concurrent.Executors;
    1.12 +
    1.13 +/**
    1.14 + *
    1.15 + * @author Jaroslav Tulach <jtulach@netbeans.org>
    1.16 + */
    1.17 +final class PostEventSupport implements EventSupport, Runnable {
    1.18 +    private final List<ModificationListener> listeners = new CopyOnWriteArrayList<ModificationListener>();
    1.19 +    private final List<Deliverable> deliverables = new CopyOnWriteArrayList<Deliverable>();
    1.20 +    private static final Executor EXEC = Executors.newSingleThreadExecutor();
    1.21 +    
    1.22 +    PostEventSupport() {
    1.23 +    }
    1.24 +
    1.25 +    @Override
    1.26 +    public void fireModificationEvent(ModificationEvent ev) {
    1.27 +        synchronized (deliverables) {
    1.28 +            final Deliverable d = new Deliverable(ev, listeners.toArray(new ModificationListener[0]));
    1.29 +            deliverables.add(d);
    1.30 +            EXEC.execute(this);
    1.31 +        }
    1.32 +    }
    1.33 +
    1.34 +    @Override
    1.35 +    public void add(ModificationListener l) {
    1.36 +        listeners.add(l);
    1.37 +    }
    1.38 +
    1.39 +    @Override
    1.40 +    public void remove(ModificationListener l) {
    1.41 +        listeners.remove(l);
    1.42 +    }
    1.43 +
    1.44 +    @Override
    1.45 +    public void run() {
    1.46 +        Deliverable[] pending;
    1.47 +        synchronized (deliverables) {
    1.48 +            if (deliverables.isEmpty()) {
    1.49 +                return;
    1.50 +            }
    1.51 +            pending = deliverables.toArray(new Deliverable[0]);
    1.52 +            deliverables.clear();
    1.53 +        }
    1.54 +        Calculator calc = null;
    1.55 +        Set<PostModificationListener> notify = new HashSet<PostModificationListener>();
    1.56 +        int pendingCount = pending.length;
    1.57 +        for (Deliverable d : pending) {
    1.58 +            calc = (Calculator)d.ev.getSource();
    1.59 +            d.ev.pending = --pendingCount;
    1.60 +            d.ev.posts = notify;
    1.61 +            for (ModificationListener l : d.listeners) {
    1.62 +                l.modification(d.ev);
    1.63 +            }
    1.64 +            d.ev.posts = null;
    1.65 +        }
    1.66 +        
    1.67 +        for (PostModificationListener pml : notify) {
    1.68 +            pml.postProcess(new PostModificationEvent(calc));
    1.69 +        }
    1.70 +    }
    1.71 +    
    1.72 +    private static class Deliverable {
    1.73 +        final ModificationEvent ev;
    1.74 +        final ModificationListener[] listeners;
    1.75 +
    1.76 +        public Deliverable(ModificationEvent ev, ModificationListener[] listeners) {
    1.77 +            this.ev = ev;
    1.78 +            this.listeners = listeners;
    1.79 +        }
    1.80 +    }
    1.81 +}