01 /*
02 * Copyright 1996-1997 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package java.beans;
27
28 /**
29 * A VetoableChange event gets fired whenever a bean changes a "constrained"
30 * property. You can register a VetoableChangeListener with a source bean
31 * so as to be notified of any constrained property updates.
32 */
33 public interface VetoableChangeListener extends java.util.EventListener {
34 /**
35 * This method gets called when a constrained property is changed.
36 *
37 * @param evt a <code>PropertyChangeEvent</code> object describing the
38 * event source and the property that has changed.
39 * @exception PropertyVetoException if the recipient wishes the property
40 * change to be rolled back.
41 */
42 void vetoableChange(PropertyChangeEvent evt)
43 throws PropertyVetoException;
44 }
|