1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 package org.apache.maven.shared.dependency.graph.traversal; 20 21 import java.util.ArrayList; 22 import java.util.Collections; 23 import java.util.List; 24 25 import org.apache.maven.shared.dependency.graph.DependencyNode; 26 27 /** 28 * A dependency node visitor that collects visited nodes for further processing. 29 * 30 * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a> 31 * @version $Id$ 32 * @since 1.1 33 */ 34 public class CollectingDependencyNodeVisitor implements DependencyNodeVisitor { 35 // fields ----------------------------------------------------------------- 36 37 /** 38 * The collected list of nodes. 39 */ 40 private final List<DependencyNode> nodes; 41 42 // constructors ----------------------------------------------------------- 43 44 /** 45 * Creates a dependency node visitor that collects visited nodes for further processing. 46 */ 47 public CollectingDependencyNodeVisitor() { 48 nodes = new ArrayList<>(); 49 } 50 51 // DependencyNodeVisitor methods ------------------------------------------ 52 53 /** 54 * {@inheritDoc} 55 */ 56 @Override 57 public boolean visit(DependencyNode node) { 58 // collect node 59 nodes.add(node); 60 61 return true; 62 } 63 64 /** 65 * {@inheritDoc} 66 */ 67 @Override 68 public boolean endVisit(DependencyNode node) { 69 return true; 70 } 71 72 // public methods --------------------------------------------------------- 73 74 /** 75 * Gets the list of collected dependency nodes. 76 * 77 * @return the list of collected dependency nodes 78 */ 79 public List<DependencyNode> getNodes() { 80 return Collections.unmodifiableList(nodes); 81 } 82 }