/* ********************************************************************** **
** 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.dao.DynamicDAO;
import org.rssowl.core.persist.reference.NewsReference;
import org.rssowl.ui.internal.Controller;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
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 marking news as
* sticky.
*
* @author bpasero
*/
public class StickyOperation implements IUndoOperation {
/* Limit when this operation is becoming a long running one */
private static final int LONG_RUNNING_LIMIT = 50;
private final Map<Boolean, List<NewsReference>> fOldStickyStates;
private final boolean fMakeSticky;
private final int fNewsCount;
/**
* @param news
* @param makeSticky
*/
public StickyOperation(Collection<INews> news, boolean makeSticky) {
fOldStickyStates = toStickyMap(news);
fMakeSticky = makeSticky;
fNewsCount = news.size();
}
private Map<Boolean, List<NewsReference>> toStickyMap(Collection<INews> news) {
Map<Boolean, List<NewsReference>> map = new HashMap<Boolean, List<NewsReference>>();
for (INews newsitem : news) {
List<NewsReference> newsrefs = map.get(newsitem.isFlagged());
if (newsrefs == null) {
newsrefs = new ArrayList<NewsReference>();
map.put(newsitem.isFlagged(), newsrefs);
}
newsrefs.add(newsitem.toReference());
}
return map;
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#getName()
*/
public String getName() {
return fMakeSticky ? NLS.bind(Messages.StickyOperation_MARK_N_STICKY, fNewsCount) : NLS.bind(Messages.StickyOperation_MARK_N_UNSTICKY, fNewsCount);
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#undo()
*/
public void undo() {
Set<Entry<Boolean, List<NewsReference>>> entries = fOldStickyStates.entrySet();
for (Entry<Boolean, List<NewsReference>> entry : entries) {
boolean oldSticky = entry.getKey();
List<NewsReference> newsRefs = entry.getValue();
List<INews> resolvedNews = new ArrayList<INews>(newsRefs.size());
for (NewsReference newsRef : newsRefs) {
INews news = newsRef.resolve();
if (news != null) {
resolvedNews.add(news);
news.setFlagged(oldSticky);
}
}
/* Force quick update of saved searches */
Controller.getDefault().getSavedSearchService().forceQuickUpdate();
/* Set old sticky-state back to all news */
DynamicDAO.saveAll(resolvedNews);
}
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#redo()
*/
public void redo() {
/* Resolve News */
List<INews> resolvedNews = new ArrayList<INews>(fNewsCount);
Collection<List<NewsReference>> newsRefLists = fOldStickyStates.values();
for (List<NewsReference> newsRefList : newsRefLists) {
for (NewsReference newsRef : newsRefList) {
INews news = newsRef.resolve();
if (news != null) {
resolvedNews.add(news);
news.setFlagged(fMakeSticky);
}
}
}
/* Force quick update of saved searches */
Controller.getDefault().getSavedSearchService().forceQuickUpdate();
/* Set state back to all news */
DynamicDAO.saveAll(resolvedNews);
}
/*
* @see org.rssowl.ui.internal.undo.IUndoOperation#isLongRunning()
*/
public boolean isLongRunning() {
return fNewsCount > LONG_RUNNING_LIMIT;
}
}