1 /* 2 * E-nspire Gemini. 3 * A Java and AspectJ based framework that enables transparent 4 * bidirectional relationships between Plain Old Java Objects. 5 * 6 * Copyright (C) 2005 Dragan Djuric 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 2 11 * of the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 21 * 22 * Contact the author at dragand@dev.java.net 23 */ 24 package com.enspire.gemini.commands; 25 26 /*** 27 * Executes a given command and keeps it in the history stack. 28 * @author Dragan Djuric <dragand@dev.java.net> 29 * @since 1.0 30 */ 31 public interface CommandExecutor { 32 33 /*** 34 * Executes the given command. 35 * @param command the command that is to be executed. 36 */ 37 void execute(Command command); 38 39 /*** 40 * Undoes all commands that have been executed up to now 41 * (does not include already undoed commands). 42 */ 43 void undo(); 44 }