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1   package org.apache.maven.plugin;
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.execution.MavenSession;
23  import org.eclipse.aether.RepositorySystemSession;
24  
25  /**
26   * Helps to provide backward-compatibility with plugins that use legacy components. <strong>Warning:</strong> This is an
27   * internal utility interface that is only public for technical reasons, it is not part of the public API. In
28   * particular, this interface can be changed or deleted without prior notice.
29   * 
30   * @since 3.0
31   * @author Benjamin Bentmann
32   */
33  public interface LegacySupport
34  {
35  
36      /**
37       * Sets the currently active session. Some legacy components are basically stateful and their API is missing
38       * parameters that would be required to delegate to a stateless component. Saving the session (in a thread-local
39       * variable) is our best effort to record any state that is required to enable proper delegation.
40       * 
41       * @param session The currently active session, may be {@code null}.
42       */
43      void setSession( MavenSession session );
44  
45      /**
46       * Gets the currently active session.
47       * 
48       * @return The currently active session or {@code null} if none.
49       */
50      MavenSession getSession();
51  
52      /**
53       * Gets the currently active repository session.
54       * 
55       * @return The currently active repository session or {@code null} if none.
56       */
57      RepositorySystemSession getRepositorySession();
58  
59  }