001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.configuration2.tree;
018
019/**
020 * <p>
021 * A simple adapter class that simplifies writing custom node visitor implementations.
022 * </p>
023 * <p>
024 * This class provides dummy implementations for the methods defined in the {@code ConfigurationNodeVisitor} interface.
025 * Derived classes only need to override the methods they really need.
026 * </p>
027 *
028 * @param <T> the type of the nodes processed by this visitor
029 */
030public class ConfigurationNodeVisitorAdapter<T> implements ConfigurationNodeVisitor<T> {
031    /**
032     * {@inheritDoc} Empty dummy implementation of this interface method.
033     */
034    @Override
035    public void visitBeforeChildren(final T node, final NodeHandler<T> handler) {
036    }
037
038    /**
039     * {@inheritDoc} Empty dummy implementation of this interface method.
040     */
041    @Override
042    public void visitAfterChildren(final T node, final NodeHandler<T> handler) {
043    }
044
045    /**
046     * {@inheritDoc} This implementation returns always <b>false</b>; this means that all nodes in the current hierarchy are
047     * traversed.
048     */
049    @Override
050    public boolean terminate() {
051        return false;
052    }
053}