1 package org.apache.maven.shared.transfer.graph; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 23 /** 24 * Defines a hierarchical visitor for collecting dependency node trees. 25 * 26 * @author Pim Moerenhout 27 * @since 0.12 28 */ 29 public interface DependencyVisitor 30 { 31 /** 32 * Starts the visit to the specified dependency node. 33 * 34 * @param node the dependency node to visit 35 * @return <code>true</code> to visit the specified dependency node's children, <code>false</code> to skip the 36 * specified dependency node's children and proceed to its next sibling 37 */ 38 boolean visitEnter( DependencyNode node ); 39 40 /** 41 * Ends the visit to to the specified dependency node. 42 * 43 * @param node the dependency node to visit 44 * @return <code>true</code> to visit the specified dependency node's next sibling, <code>false</code> to skip the 45 * specified dependency node's next siblings and proceed to its parent 46 */ 47 boolean visitLeave( DependencyNode node ); 48 }