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 015package 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 026public 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}