    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
    022 * implementations.
    023 * </p>
    024 * <p>
    025 * This class provides dummy implementations for the methods defined in the
    026 * {@code ConfigurationNodeVisitor} interface. Derived classes only need
    027 * to override the methods they really need.
    028 * </p>
    029 *
    030 * @param  <T> the type of the nodes processed by this visitor
    031 */
    032public class ConfigurationNodeVisitorAdapter<T> implements
    033        ConfigurationNodeVisitor<T>
    034{
    035    /**
    036     * {@inheritDoc} Empty dummy implementation of this interface method.
    037     */
    038    @Override
    039    public void visitBeforeChildren(final T node, final NodeHandler<T> handler)
    040    {
    041    }
    042
    043    /**
    044     * {@inheritDoc} Empty dummy implementation of this interface method.
    045     */
    046    @Override
    047    public void visitAfterChildren(final T node, final NodeHandler<T> handler)
    048    {
    049    }
    050
    051    /**
    052     * {@inheritDoc} This implementation returns always <b>false</b>; this means
    053     * that all nodes in the current hierarchy are traversed.
    054     */
    055    @Override
    056    public boolean terminate()
    057    {
    058        return false;
    059    }
    060}