1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.configuration2.tree;
18
19 /**
20 * <p>
21 * A simple adapter class that simplifies writing custom node visitor implementations.
22 * </p>
23 * <p>
24 * This class provides dummy implementations for the methods defined in the {@code ConfigurationNodeVisitor} interface.
25 * Derived classes only need to override the methods they really need.
26 * </p>
27 *
28 * @param <T> the type of the nodes processed by this visitor
29 */
30 public class ConfigurationNodeVisitorAdapter<T> implements ConfigurationNodeVisitor<T> {
31 /**
32 * {@inheritDoc} Empty dummy implementation of this interface method.
33 */
34 @Override
35 public void visitBeforeChildren(final T node, final NodeHandler<T> handler) {
36 }
37
38 /**
39 * {@inheritDoc} Empty dummy implementation of this interface method.
40 */
41 @Override
42 public void visitAfterChildren(final T node, final NodeHandler<T> handler) {
43 }
44
45 /**
46 * {@inheritDoc} This implementation returns always <b>false</b>; this means that all nodes in the current hierarchy are
47 * traversed.
48 */
49 @Override
50 public boolean terminate() {
51 return false;
52 }
53 }