1 package org.apache.maven.shared.dependency.graph.internal.maven30;
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 import java.util.Collection;
23
24 import org.apache.maven.shared.dependency.graph.internal.maven30.ConflictResolver.ConflictContext;
25 import org.apache.maven.shared.dependency.graph.internal.maven30.ConflictResolver.ConflictItem;
26 import org.apache.maven.shared.dependency.graph.internal.maven30.ConflictResolver.OptionalitySelector;
27 import org.sonatype.aether.RepositoryException;
28
29 /**
30 * This class is a copy of their homonymous in the Eclipse Aether library, adapted to work with Sonatype Aether.
31 *
32 * @author Gabriel Belingueres
33 * @since 3.1.0
34 */
35 public class SimpleOptionalitySelector
36 extends OptionalitySelector
37 {
38
39 @Override
40 public void selectOptionality( ConflictContext context )
41 throws RepositoryException
42 {
43 boolean optional = chooseEffectiveOptionality( context.getItems() );
44 context.setOptional( optional );
45 }
46
47 private boolean chooseEffectiveOptionality( Collection<ConflictItem> items )
48 {
49 boolean optional = true;
50 for ( ConflictItem item : items )
51 {
52 if ( item.getDepth() <= 1 )
53 {
54 return item.getDependency().isOptional();
55 }
56 if ( ( item.getOptionalities() & ConflictItem.OPTIONAL_FALSE ) != 0 )
57 {
58 optional = false;
59 }
60 }
61 return optional;
62 }
63
64 }