    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}