/*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2011 University of Dundee & Open Microscopy Environment.
* 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.treeviewer;
import java.util.List;
import org.openmicroscopy.shoola.agents.treeviewer.view.TreeViewer;
import omero.gateway.SecurityContext;
import org.openmicroscopy.shoola.env.data.views.CallHandle;
import omero.gateway.model.FileAnnotationData;
/**
* Loads the parents of the specified annotation.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @since Beta4.3.2
*/
public class ParentLoader
extends DataTreeViewerLoader
{
/** Handle to the asynchronous call so that we can cancel it. */
private CallHandle handle;
/** The annotation to handle.*/
private FileAnnotationData data;
/**
* Creates a new instance.
*
* @param viewer The Editor this data loader is for.
* Mustn't be <code>null</code>.
* @param ctx The security context.
* @param data The file annotation to handle.
*/
public ParentLoader(TreeViewer viewer, SecurityContext ctx,
FileAnnotationData data)
{
super(viewer, ctx);
if (data == null)
throw new IllegalArgumentException("No object to handle");
this.data = data;
}
/**
* Loads the parent associated to the annotation.
* @see DataTreeViewerLoader#load()
*/
public void load()
{
handle = dmView.loadParentsOfAnnotation(ctx, data.getId(), this);
}
/**
* Cancels the data loading.
* @see DataTreeViewerLoader#cancel()
*/
public void cancel() { handle.cancel(); }
/**
* Feeds the result back to the viewer.
* @see DataTreeViewerLoader#handleResult(Object)
*/
public void handleResult(Object result)
{
if (viewer.getState() == TreeViewer.DISCARDED) return; //Async cancel.
List<Object> nodes = (List<Object>) result;
if (nodes.size() == 0) return;
viewer.browseContainer(nodes.get(0), null);
}
}