/*
* org.openmicroscopy.shoola.agents.metadata.ChannelDataLoader
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2008 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.agents.metadata;
//Java imports
import java.util.HashMap;
import java.util.Map;
//Third-party libraries
//Application-internal dependencies
import org.openmicroscopy.shoola.agents.metadata.editor.Editor;
import omero.gateway.SecurityContext;
import org.openmicroscopy.shoola.env.data.views.CallHandle;
/**
* Loads the channels information related to a given set of pixels.
* This class calls one of the <code>loadChannelsData</code> methods in the
* <code>DataManagerView</code>.
*
* @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
* <small>
* (<b>Internal version:</b> $Revision: $Date: $)
* </small>
* @since OME3.0
*/
public class ChannelDataLoader
extends EditorLoader
{
/** The id of the pixels set. */
private long pixelsID;
/** The id of the user. */
private long userID;
/** Handle to the asynchronous call so that we can cancel it. */
private CallHandle handle;
/**
* Creates a new instance.
*
* @param viewer Reference to the viewer. Mustn't be <code>null</code>.
* @param ctx The security context.
* @param pixelsID The id of the pixels set.
* @param userID The id of the user.
*/
public ChannelDataLoader(Editor viewer, SecurityContext ctx, long pixelsID,
long userID)
{
super(viewer, ctx);
this.pixelsID = pixelsID;
this.userID = userID;
}
/**
* Retrieves the channels for the specified pixels set.
* @see EditorLoader#load()
*/
public void load()
{
handle = dmView.loadChannelsData(ctx, pixelsID, userID, this);
}
/**
* Notifies the user that it wasn't possible to retrieve the data and
* and discards the {@link #viewer}.
*/
public void handleNullResult()
{
viewer.setChannelsData(new HashMap(), true);
}
/**
* Cancels the data loading.
* @see EditorLoader#cancel()
*/
public void cancel() { handle.cancel(); }
/**
* Feeds the result back to the viewer.
* @see EditorLoader#handleResult(Object)
*/
public void handleResult(Object result)
{
viewer.setChannelsData((Map) result, true);
}
}