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}