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1   package org.apache.maven.repository.legacy.resolver.conflict;
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 org.apache.maven.artifact.resolver.ResolutionNode;
23  import org.codehaus.plexus.component.annotations.Component;
24  
25  /**
26   * Resolves conflicting artifacts by always selecting the <em>nearest</em> declaration. Nearest is defined as the
27   * declaration that has the least transitive steps away from the project being built.
28   *
29   * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
30   * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
31   * @since 3.0
32   */
33  @Component( role = ConflictResolver.class, hint = "nearest" )
34  public class NearestConflictResolver
35      implements ConflictResolver
36  {
37      // ConflictResolver methods -----------------------------------------------
38  
39      /*
40      * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
41      *      org.apache.maven.artifact.resolver.ResolutionNode)
42      */
43  
44      public ResolutionNode resolveConflict( ResolutionNode node1, ResolutionNode node2 )
45      {
46          return node1.getDepth() <= node2.getDepth() ? node1 : node2;
47      }
48  }