KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > cayenne > graph > NodeIdChangeOperation


1 /*****************************************************************
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements. See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership. The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License. You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing,
13  * software distributed under the License is distributed on an
14  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15  * KIND, either express or implied. See the License for the
16  * specific language governing permissions and limitations
17  * under the License.
18  ****************************************************************/
19
20 package org.apache.cayenne.graph;
21
22 /**
23  * A GraphDiff representing a change in node ID.
24  *
25  * @since 1.2
26  * @author Andrus Adamchik
27  */
28 public class NodeIdChangeOperation extends NodeDiff {
29
30     protected Object JavaDoc newNodeId;
31
32     public NodeIdChangeOperation(Object JavaDoc nodeId, Object JavaDoc newNodeId) {
33         super(nodeId);
34
35         this.newNodeId = newNodeId;
36     }
37
38     public NodeIdChangeOperation(Object JavaDoc nodeId, Object JavaDoc newNodeId, int diffId) {
39         super(nodeId, diffId);
40         this.newNodeId = newNodeId;
41     }
42
43     public void apply(GraphChangeHandler tracker) {
44         tracker.nodeIdChanged(nodeId, newNodeId);
45     }
46
47     public void undo(GraphChangeHandler tracker) {
48         tracker.nodeIdChanged(newNodeId, nodeId);
49     }
50 }
51
Popular Tags