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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.repository.metadata;
20  
21  import javax.inject.Named;
22  import javax.inject.Singleton;
23  
24  import org.apache.maven.artifact.versioning.ArtifactVersion;
25  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
26  import org.codehaus.plexus.component.annotations.Configuration;
27  
28  /**
29   *
30   */
31  @Named
32  @Singleton
33  @Deprecated
34  public class DefaultGraphConflictResolutionPolicy implements GraphConflictResolutionPolicy {
35      /**
36       * artifact, closer to the entry point, is selected
37       */
38      @Configuration(name = "closer-first", value = "true")
39      private boolean closerFirst = true;
40  
41      /**
42       * newer artifact is selected
43       */
44      @Configuration(name = "newer-first", value = "true")
45      private boolean newerFirst = true;
46  
47      public MetadataGraphEdge apply(MetadataGraphEdge e1, MetadataGraphEdge e2) {
48          int depth1 = e1.getDepth();
49          int depth2 = e2.getDepth();
50  
51          if (depth1 == depth2) {
52              ArtifactVersion v1 = new DefaultArtifactVersion(e1.getVersion());
53              ArtifactVersion v2 = new DefaultArtifactVersion(e2.getVersion());
54  
55              if (newerFirst) {
56                  return v1.compareTo(v2) > 0 ? e1 : e2;
57              }
58  
59              return v1.compareTo(v2) > 0 ? e2 : e1;
60          }
61  
62          if (closerFirst) {
63              return depth1 < depth2 ? e1 : e2;
64          }
65  
66          return depth1 < depth2 ? e2 : e1;
67      }
68  }