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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
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package org.apache.cayenne.graph;
import org.apache.cayenne.event.CayenneEvent;
/**
* An event indicating a change in the object graph. A change is expressed as a
* GraphDiff, so the easiest way to process the event is the following:
*
* <pre>
* GraphChangeHandler handler = ..;
* event.getDiff().apply(handler);
* </pre>
*
* @since 1.2
*/
public class GraphEvent extends CayenneEvent {
private static final long serialVersionUID = -8954343713674462675L;
protected GraphDiff diff;
public GraphEvent(Object source, GraphDiff diff) {
this(source, source, diff);
}
public GraphEvent(Object source, Object postedBy, GraphDiff diff) {
super(source, postedBy, null);
this.diff = diff;
}
public GraphDiff getDiff() {
return diff;
}
}