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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  }