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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.eclipse.aether.internal.impl.synccontext.named;
20  
21  import java.util.Collection;
22  import java.util.Collections;
23  
24  import org.eclipse.aether.RepositorySystemSession;
25  import org.eclipse.aether.artifact.Artifact;
26  import org.eclipse.aether.metadata.Metadata;
27  import org.eclipse.aether.named.NamedLockKey;
28  
29  /**
30   * Static {@link NameMapper}, always assigns one same name, effectively becoming equivalent to "static" sync context:
31   * always maps ANY input to same name.
32   */
33  public class StaticNameMapper implements NameMapper {
34      @Override
35      public boolean isFileSystemFriendly() {
36          return true;
37      }
38  
39      @Override
40      public Collection<NamedLockKey> nameLocks(
41              final RepositorySystemSession session,
42              final Collection<? extends Artifact> artifacts,
43              final Collection<? extends Metadata> metadatas) {
44          if (artifacts != null && !artifacts.isEmpty()) {
45              return Collections.singletonList(NamedLockKey.of("static-artifact"));
46          } else if (metadatas != null && !metadatas.isEmpty()) {
47              return Collections.singletonList(NamedLockKey.of("static-metadata"));
48          } else {
49              return Collections.emptyList();
50          }
51      }
52  }