01: /*
02: * @(#)VetoableChangeListener.java 1.19 06/10/10
03: *
04: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: *
26: */
27:
28: package java.beans;
29:
30: /**
31: * A VetoableChange event gets fired whenever a bean changes a "constrained"
32: * property. You can register a VetoableChangeListener with a source bean
33: * so as to be notified of any constrained property updates.
34: */
35: public interface VetoableChangeListener extends java.util.EventListener {
36: /**
37: * This method gets called when a constrained property is changed.
38: *
39: * @param evt a <code>PropertyChangeEvent</code> object describing the
40: * event source and the property that has changed.
41: * @exception PropertyVetoException if the recipient wishes the property
42: * change to be rolled back.
43: */
44: void vetoableChange(PropertyChangeEvent evt)
45: throws PropertyVetoException;
46: }
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