001 // Copyright 2004, 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.record; 016 017 /** 018 * Represents a change to a component on a page, this represents a datum of information stored by a 019 * {@link org.apache.tapestry.engine.IPageRecorder}. 020 * <p> 021 * Renamed from IPageChange in release 4.0. 022 * 023 * @author Howard Lewis Ship 024 */ 025 026 public interface PropertyChange 027 { 028 /** 029 * The path to the component on the page, or null if the property is a property of the page. 030 */ 031 032 public String getComponentPath(); 033 034 /** 035 * The new value for the property, which may be null. 036 */ 037 038 public Object getNewValue(); 039 040 /** 041 * The name of the property that changed. 042 */ 043 044 public String getPropertyName(); 045 }