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* Copyright (C) 2006-2010 University of Dundee. All rights reserved.
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* This program is free software; you can redistribute it and/or modify
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* the Free Software Foundation; either version 2 of the License, or
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* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
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package org.openmicroscopy.shoola.env.ui;
import org.openmicroscopy.shoola.agents.dataBrowser.DataBrowserLoader;
import org.openmicroscopy.shoola.env.config.Registry;
import org.openmicroscopy.shoola.env.data.events.DSCallFeedbackEvent;
import org.openmicroscopy.shoola.env.data.events.UserGroupSwitched;
import omero.gateway.SecurityContext;
import org.openmicroscopy.shoola.env.data.views.CallHandle;
import omero.gateway.model.ExperimenterData;
/**
* Saves data and switches groups.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* @since 3.0-Beta4
*/
public class SwitchUserLoader
extends UserNotifierLoader
{
/** The experimenter to handle. */
private ExperimenterData experimenter;
/** The identifier of the group. */
private long groupID;
/** Handle to the asynchronous call so that we can cancel it. */
private CallHandle handle;
/**
* Creates a new instance.
*
* @param viewer The viewer this data loader is for.
* Mustn't be <code>null</code>.
* @param registry Convenience reference for subclasses.
* @param ctx The security context.
* @param experimenter The experimenter to handle.
* @param groupID The identifier of the group.
*/
public SwitchUserLoader(UserNotifier viewer, Registry registry,
SecurityContext ctx, ExperimenterData experimenter, long groupID)
{
super(viewer, registry, ctx, null);
this.experimenter = experimenter;
this.groupID = groupID;
}
/**
* Saves data before switching user.
* @see UserNotifierLoader#load()
*/
public void load()
{
handle = dhView.switchUserGroup(ctx, experimenter, groupID, this);
}
/**
* Cancels the ongoing data retrieval.
* @see UserNotifierLoader#cancel()
*/
public void cancel() { handle.cancel(); }
/**
* Feeds the results back to the viewer, as they arrive.
* @see DataBrowserLoader#update(DSCallFeedbackEvent)
*/
public void update(DSCallFeedbackEvent fe)
{
Object result = fe.getPartialResult();
if (result != null) {
viewer.setStatus(result);
if (result instanceof ExperimenterData) {
registry.getEventBus().post(new UserGroupSwitched(true));
}
}
}
/**
* Does nothing as the asynchronous call returns <code>null</code>.
* @see UserNotifierLoader#handleNullResult()
*/
public void handleNullResult() {}
}