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.impl;
20
21 import java.util.Collections;
22 import java.util.List;
23 import java.util.function.Predicate;
24 import java.util.stream.Collectors;
25
26 import org.apache.maven.api.Node;
27 import org.apache.maven.api.NodeVisitor;
28
29 public abstract class AbstractNode implements Node {
30
31 abstract org.eclipse.aether.graph.DependencyNode getDependencyNode();
32
33 @Override
34 public boolean accept(NodeVisitor visitor) {
35 if (visitor.enter(this)) {
36 for (Node child : getChildren()) {
37 if (!child.accept(visitor)) {
38 break;
39 }
40 }
41 }
42 return visitor.leave(this);
43 }
44
45 @Override
46 public Node filter(Predicate<Node> filter) {
47 List<Node> children =
48 getChildren().stream().filter(filter).map(n -> n.filter(filter)).collect(Collectors.toList());
49 return new WrapperNode(this, Collections.unmodifiableList(children));
50 }
51
52 @Override
53 public String toString() {
54 return getDependencyNode().toString();
55 }
56 }