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}