01: /*
02: * $Id: Change.java 456694 2005-05-18 12:27:45Z ehillenius $
03: * $Revision: 456694 $ $Date: 2005-05-18 14:27:45 +0200 (Wed, 18 May 2005) $
04: *
05: * ==============================================================================
06: * Licensed under the Apache License, Version 2.0 (the "License"); you may not
07: * use this file except in compliance with the License. You may obtain a copy of
08: * the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
14: * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
15: * License for the specific language governing permissions and limitations under
16: * the License.
17: */
18: package wicket.version.undo;
19:
20: import java.io.Serializable;
21:
22: /**
23: * Undo information for a change to the page.
24: *
25: * @author Jonathan Locke
26: */
27: public abstract class Change implements Serializable {
28: /**
29: * Undoes the given change.
30: */
31: public abstract void undo();
32: }
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