tapestry/tapestry-framework/src/java/org/apache/tapestry/record/PropertyChange.java

// Copyright 2004, 2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package org.apache.tapestry.record;

/**
 * Represents a change to a component on a page, this represents a datum of
 * information stored by a {@link org.apache.tapestry.engine.IPageRecorder}.
 * <p>
 * Renamed from IPageChange in release 4.0.
 * 
 * @author Howard Lewis Ship
 */

public interface PropertyChange
{

    /**
     * The path to the component on the page, or null if the property is a
     * property of the page.
     */

    String getComponentPath();

    /**
     * The new value for the property, which may be null.
     */

    Object getNewValue();

    /**
     * The name of the property that changed.
     */

    String getPropertyName();
}