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1   package org.apache.maven.repository.internal;
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  import java.util.Collections;
24  import java.util.LinkedHashMap;
25  import java.util.Map;
26  
27  import org.sonatype.aether.ConfigurationProperties;
28  import org.sonatype.aether.RepositorySystemSession;
29  import org.sonatype.aether.artifact.Artifact;
30  import org.sonatype.aether.deployment.DeployRequest;
31  import org.sonatype.aether.impl.MetadataGenerator;
32  import org.sonatype.aether.metadata.Metadata;
33  
34  /**
35   * @author Benjamin Bentmann
36   */
37  class RemoteSnapshotMetadataGenerator
38      implements MetadataGenerator
39  {
40  
41      private final Map<Object, RemoteSnapshotMetadata> snapshots;
42  
43      private final boolean legacyFormat;
44  
45      public RemoteSnapshotMetadataGenerator( RepositorySystemSession session, DeployRequest request )
46      {
47          legacyFormat = ConfigurationProperties.get( session.getConfigProperties(), "maven.metadata.legacy", false );
48  
49          snapshots = new LinkedHashMap<Object, RemoteSnapshotMetadata>();
50  
51          /*
52           * NOTE: This should be considered a quirk to support interop with Maven's legacy ArtifactDeployer which
53           * processes one artifact at a time and hence cannot associate the artifacts from the same project to use the
54           * same timestamp+buildno for the snapshot versions. Allowing the caller to pass in metadata from a previous
55           * deployment allows to re-establish the association between the artifacts of the same project.
56           */
57          for ( Metadata metadata : request.getMetadata() )
58          {
59              if ( metadata instanceof RemoteSnapshotMetadata )
60              {
61                  RemoteSnapshotMetadata snapshotMetadata = (RemoteSnapshotMetadata) metadata;
62                  snapshots.put( snapshotMetadata.getKey(), snapshotMetadata );
63              }
64          }
65      }
66  
67      public Collection<? extends Metadata> prepare( Collection<? extends Artifact> artifacts )
68      {
69          for ( Artifact artifact : artifacts )
70          {
71              if ( artifact.isSnapshot() )
72              {
73                  Object key = RemoteSnapshotMetadata.getKey( artifact );
74                  RemoteSnapshotMetadata snapshotMetadata = snapshots.get( key );
75                  if ( snapshotMetadata == null )
76                  {
77                      snapshotMetadata = new RemoteSnapshotMetadata( artifact, legacyFormat );
78                      snapshots.put( key, snapshotMetadata );
79                  }
80                  snapshotMetadata.bind( artifact );
81              }
82          }
83  
84          return snapshots.values();
85      }
86  
87      public Artifact transformArtifact( Artifact artifact )
88      {
89          if ( artifact.isSnapshot() && artifact.getVersion().equals( artifact.getBaseVersion() ) )
90          {
91              Object key = RemoteSnapshotMetadata.getKey( artifact );
92              RemoteSnapshotMetadata snapshotMetadata = snapshots.get( key );
93              if ( snapshotMetadata != null )
94              {
95                  artifact = artifact.setVersion( snapshotMetadata.getExpandedVersion( artifact ) );
96              }
97          }
98  
99          return artifact;
100     }
101 
102     public Collection<? extends Metadata> finish( Collection<? extends Artifact> artifacts )
103     {
104         return Collections.emptyList();
105     }
106 
107 }