Java tutorial
/* Copyright (C) 2003-2016 JabRef contributors. 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 net.sf.jabref.gui.undo; import javax.swing.undo.AbstractUndoableEdit; import net.sf.jabref.gui.BasePanel; import net.sf.jabref.model.database.BibDatabase; import net.sf.jabref.model.entry.BibEntry; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * This class represents the removal of an entry. The constructor needs * references to the database, the entry, and the map of open entry editors. * The latter to be able to close the entry's editor if it is opened before * the insert is undone. */ public class UndoableInsertEntry extends AbstractUndoableEdit { private final BibDatabase base; private final BibEntry entry; private final BasePanel panel; private static final Log LOGGER = LogFactory.getLog(UndoableInsertEntry.class); public UndoableInsertEntry(BibDatabase base, BibEntry entry, BasePanel panel) { this.base = base; this.entry = entry; this.panel = panel; } @Override public String getUndoPresentationName() { return "Undo: insert entry"; } @Override public String getRedoPresentationName() { return "Redo: insert entry"; } @Override public void undo() { super.undo(); // Revert the change. try { base.removeEntry(entry); // If the entry has an editor currently open, we must close it. panel.ensureNotShowingBottomPanel(entry); } catch (Throwable ex) { LOGGER.warn("Problem to undo `insert entry`", ex); } } @Override public void redo() { super.redo(); base.insertEntry(entry); } }