DocumentUpdatedEvent is fired prior to attachments being saved

{{groovy}}
/* -*- Mode: java; tab-width: 4; indent-tabs-mode: nil; -*- */
import java.util.List;
import java.util.ArrayList;

import org.xwiki.observation.ObservationManager;
import org.xwiki.observation.EventListener;
import org.xwiki.bridge.event.DocumentUpdatedEvent;
import org.xwiki.bridge.event.DocumentCreatedEvent;
import org.xwiki.bridge.event.DocumentDeletedEvent;
import org.xwiki.observation.event.Event;
import com.xpn.xwiki.api.XWiki;
import com.xpn.xwiki.web.Utils;
import com.xpn.xwiki.XWikiContext;
import com.xpn.xwiki.doc.XWikiDocument;
import com.xpn.xwiki.objects.BaseObject;

class TestListener implements EventListener
{
    public String getName() {
        return "TestListener";
    }

    public List<Event> getEvents() {
        return (new ArrayList<Event>() {{
            add(new DocumentUpdatedEvent());
            add(new DocumentCreatedEvent());
            add(new DocumentDeletedEvent());
        }});
    }

    public void onEvent(Event event, Object source, Object data) {
        XWikiDocument doc = (XWikiDocument) source;
        if (doc.getAttachmentList().size() > 0) {
            System.out.println("Received " + event.getClass() + " on " + doc.getFullName() + " which has attachments");

            def xc = (XWikiContext) data;
            def xwiki = new XWiki(xc.getWiki(), xc);
            def docB = xwiki.getDocument(name);
            if (docB.getAttachmentList().size() == 0) {
                try {
                    throw new Exception();
                } catch (Exception e) {
                    e.printStackTrace(System.out);
                }
            }
        } else {
            System.out.println("Received " + event.getClass() + " on " + doc.getFullName() + " which has no attachments");
        }
    }
}
Utils.getComponent(ObservationManager.class).addListener(new TestListener());
{{/groovy}}