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1   package org.apache.maven.repository.legacy.resolver.transform;
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.Artifact;
23  import org.apache.maven.artifact.repository.ArtifactRepository;
24  import org.apache.maven.artifact.repository.RepositoryRequest;
25  import org.apache.maven.artifact.repository.metadata.RepositoryMetadataResolutionException;
26  import org.apache.maven.artifact.repository.metadata.Versioning;
27  import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
28  import org.apache.maven.artifact.resolver.ArtifactResolutionException;
29  import org.codehaus.plexus.component.annotations.Component;
30  
31  /**
32   * Describes a version transformation during artifact resolution - "latest" type
33   */
34  @Component( role = ArtifactTransformation.class, hint = "latest" )
35  public class LatestArtifactTransformation
36      extends AbstractVersionTransformation
37  {
38  
39      public void transformForResolve( Artifact artifact, RepositoryRequest request )
40          throws ArtifactResolutionException, ArtifactNotFoundException
41      {
42          if ( Artifact.LATEST_VERSION.equals( artifact.getVersion() ) )
43          {
44              try
45              {
46                  String version = resolveVersion( artifact, request );
47                  if ( Artifact.LATEST_VERSION.equals( version ) )
48                  {
49                      throw new ArtifactNotFoundException( "Unable to determine the latest version", artifact );
50                  }
51  
52                  artifact.setBaseVersion( version );
53                  artifact.updateVersion( version, request.getLocalRepository() );
54              }
55              catch ( RepositoryMetadataResolutionException e )
56              {
57                  throw new ArtifactResolutionException( e.getMessage(), artifact, e );
58              }
59          }
60      }
61  
62      public void transformForInstall( Artifact artifact, ArtifactRepository localRepository )
63      {
64          // metadata is added via addPluginArtifactMetadata
65      }
66  
67      public void transformForDeployment( Artifact artifact, ArtifactRepository remoteRepository,
68                                          ArtifactRepository localRepository )
69      {
70          // metadata is added via addPluginArtifactMetadata
71      }
72  
73      protected String constructVersion( Versioning versioning, String baseVersion )
74      {
75          return versioning.getLatest();
76      }
77  }