1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.configuration2.tree; 18 19 /** 20 * <p> 21 * A simple adapter class that simplifies writing custom node visitor implementations. 22 * </p> 23 * <p> 24 * This class provides dummy implementations for the methods defined in the {@code ConfigurationNodeVisitor} interface. 25 * Derived classes only need to override the methods they really need. 26 * </p> 27 * 28 * @param <T> the type of the nodes processed by this visitor 29 */ 30 public class ConfigurationNodeVisitorAdapter<T> implements ConfigurationNodeVisitor<T> { 31 /** 32 * {@inheritDoc} This implementation returns always <strong>false</strong>; this means that all nodes in the current hierarchy are 33 * traversed. 34 */ 35 @Override 36 public boolean terminate() { 37 return false; 38 } 39 40 /** 41 * {@inheritDoc} Empty dummy implementation of this interface method. 42 */ 43 @Override 44 public void visitAfterChildren(final T node, final NodeHandler<T> handler) { 45 // empty 46 } 47 48 /** 49 * {@inheritDoc} Empty dummy implementation of this interface method. 50 */ 51 @Override 52 public void visitBeforeChildren(final T node, final NodeHandler<T> handler) { 53 // empty 54 } 55 }