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