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 * @version $Id: ConfigurationNodeVisitorAdapter.java 1624601 2014-09-12 18:04:36Z oheger $ 031 * @param <T> the type of the nodes processed by this visitor 032 */ 033public class ConfigurationNodeVisitorAdapter<T> implements 034 ConfigurationNodeVisitor<T> 035{ 036 /** 037 * {@inheritDoc} Empty dummy implementation of this interface method. 038 */ 039 @Override 040 public void visitBeforeChildren(T node, NodeHandler<T> handler) 041 { 042 } 043 044 /** 045 * {@inheritDoc} Empty dummy implementation of this interface method. 046 */ 047 @Override 048 public void visitAfterChildren(T node, NodeHandler<T> handler) 049 { 050 } 051 052 /** 053 * {@inheritDoc} This implementation returns always <b>false</b>; this means 054 * that all nodes in the current hierarchy are traversed. 055 */ 056 @Override 057 public boolean terminate() 058 { 059 return false; 060 } 061}