1 package org.apache.commons.graph.visit;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.commons.graph.Edge;
23 import org.apache.commons.graph.Graph;
24 import org.apache.commons.graph.Vertex;
25
26 /**
27 * Base NOOP {@link GraphVisitHandler} implementation.
28 *
29 * @param <V> the Graph vertices type
30 * @param <E> the Graph edges type
31 */
32 public class BaseGraphVisitHandler<V extends Vertex, E extends Edge<V>>
33 implements GraphVisitHandler<V, E>
34 {
35
36 /**
37 * {@inheritDoc}
38 */
39 public void discoverGraph( Graph<V, E> graph )
40 {
41 // do nothing
42 }
43
44 /**
45 * {@inheritDoc}
46 */
47 public void discoverVertex( V vertex )
48 {
49 // do nothing
50 }
51
52 /**
53 * {@inheritDoc}
54 */
55 public void discoverEdge( E edge )
56 {
57 // do nothing
58 }
59
60 /**
61 * {@inheritDoc}
62 */
63 public void finishEdge( E edge )
64 {
65 // do nothing
66 }
67
68 /**
69 * {@inheritDoc}
70 */
71 public void finishVertex( V vertex )
72 {
73 // do nothing
74 }
75
76 /**
77 * {@inheritDoc}
78 */
79 public void finishGraph( Graph<V, E> graph )
80 {
81 // do nothing
82 }
83
84 }