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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.internal;
20  
21  import java.util.Collection;
22  import java.util.Collections;
23  import java.util.Date;
24  import java.util.LinkedHashMap;
25  import java.util.Map;
26  
27  import org.eclipse.aether.RepositorySystemSession;
28  import org.eclipse.aether.artifact.Artifact;
29  import org.eclipse.aether.impl.MetadataGenerator;
30  import org.eclipse.aether.installation.InstallRequest;
31  import org.eclipse.aether.metadata.Metadata;
32  import org.eclipse.aether.util.ConfigUtils;
33  
34  /**
35   * Maven local GAV level metadata generator.
36   * <p>
37   * Local snapshot metadata contains non-transformed snapshot version.
38   */
39  class LocalSnapshotMetadataGenerator implements MetadataGenerator {
40  
41      private final Map<Object, LocalSnapshotMetadata> snapshots;
42  
43      private final Date timestamp;
44  
45      LocalSnapshotMetadataGenerator(RepositorySystemSession session, InstallRequest request) {
46          timestamp = (Date) ConfigUtils.getObject(session, new Date(), "maven.startTime");
47  
48          snapshots = new LinkedHashMap<>();
49      }
50  
51      @Override
52      public Collection<? extends Metadata> prepare(Collection<? extends Artifact> artifacts) {
53          for (Artifact artifact : artifacts) {
54              if (artifact.isSnapshot()) {
55                  Object key = LocalSnapshotMetadata.getKey(artifact);
56                  LocalSnapshotMetadata snapshotMetadata = snapshots.get(key);
57                  if (snapshotMetadata == null) {
58                      snapshotMetadata = new LocalSnapshotMetadata(artifact, timestamp);
59                      snapshots.put(key, snapshotMetadata);
60                  }
61                  snapshotMetadata.bind(artifact);
62              }
63          }
64  
65          return Collections.emptyList();
66      }
67  
68      @Override
69      public Artifact transformArtifact(Artifact artifact) {
70          return artifact;
71      }
72  
73      @Override
74      public Collection<? extends Metadata> finish(Collection<? extends Artifact> artifacts) {
75          return snapshots.values();
76      }
77  }