1 /* 2 * Copyright (c) 1996, 1997, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * 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 }