/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** All rights reserved **
** **
** This program and the accompanying materials are made available under **
** the terms of the Eclipse Public License v1.0 which accompanies this **
** distribution, and is available at: **
** http://www.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.ui.internal.undo;
import org.eclipse.osgi.util.NLS;
import org.rssowl.core.persist.INews;
import org.rssowl.core.persist.INews.State;
import org.rssowl.core.persist.dao.DynamicDAO;
import org.rssowl.core.persist.dao.INewsDAO;
import org.rssowl.core.persist.reference.NewsReference;
import org.rssowl.core.util.CoreUtils;
import org.rssowl.ui.internal.Controller;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
/**
* An instance of {@link IUndoOperation} allowing to undo/redo copying of News
* into a Bin.
*
* @author bpasero
*/
public class CopyOperation implements IUndoOperation {
/* Limit when this operation is becoming a long running one */
private static final int LONG_RUNNING_LIMIT = 50;
private final Map<State, List<NewsReference>> fCopiedNews;
final int fNewsCount;
final INewsDAO fNewsDao = DynamicDAO.getDAO(INewsDAO.class);
/**
* @param copiednews
*/
public CopyOperation(List<INews> copiednews) {
fCopiedNews = CoreUtils.toStateMap(copiednews);
fNewsCount = copiednews.size();
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#getName()
*/
public String getName() {
return NLS.bind(Messages.CopyOperation_COPY_N, fNewsCount);
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#undo()
*/
public void undo() {
/* Force quick update of saved searches */
Controller.getDefault().getSavedSearchService().forceQuickUpdate();
/* Set Copied News to Hidden */
fNewsDao.setState(CoreUtils.resolveAll(fCopiedNews), INews.State.HIDDEN, false, false);
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#redo()
*/
public void redo() {
Set<Entry<State, List<NewsReference>>> entries = fCopiedNews.entrySet();
for (Entry<State, List<NewsReference>> entry : entries) {
INews.State oldState = entry.getKey();
List<NewsReference> newsRefs = entry.getValue();
List<INews> resolvedNews = new ArrayList<INews>(newsRefs.size());
for (NewsReference newsRef : newsRefs) {
INews newsitem = newsRef.resolve();
if (newsitem != null) {
resolvedNews.add(newsitem);
}
}
/* Force quick update of saved searches */
Controller.getDefault().getSavedSearchService().forceQuickUpdate();
/* Set old state back to all news */
fNewsDao.setState(resolvedNews, oldState, false, false);
}
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#isLongRunning()
*/
public boolean isLongRunning() {
return fNewsCount > LONG_RUNNING_LIMIT;
}
}