1 package org.sonatype.aether.collection;
2
3 /*******************************************************************************
4 * Copyright (c) 2010-2011 Sonatype, Inc.
5 * All rights reserved. This program and the accompanying materials
6 * are made available under the terms of the Eclipse Public License v1.0
7 * which accompanies this distribution, and is available at
8 * http://www.eclipse.org/legal/epl-v10.html
9 *******************************************************************************/
10
11 import org.sonatype.aether.graph.Dependency;
12
13 /**
14 * Applies dependency management to the dependencies of a dependency node. <em>Note:</em> For the sake of good
15 * performance during dependency collection, implementations should provide a semantic {@link Object#equals(Object)
16 * equals()} method.
17 *
18 * @author Benjamin Bentmann
19 * @see org.sonatype.aether.RepositorySystemSession#getDependencyManager()
20 * @see org.sonatype.aether.RepositorySystem#collectDependencies(org.sonatype.aether.RepositorySystemSession,
21 * CollectRequest)
22 */
23 public interface DependencyManager
24 {
25
26 /**
27 * Applies dependency management to the specified dependency.
28 *
29 * @param dependency The dependency to manage, must not be {@code null}.
30 * @return The management update to apply to the dependency or {@code null} if the dependency is not managed at all.
31 */
32 DependencyManagement manageDependency( Dependency dependency );
33
34 /**
35 * Derives a dependency manager for the specified collection context. When calculating the child manager,
36 * implementors are strongly advised to simply return the current instance if nothing changed to help save memory.
37 *
38 * @param context The dependency collection context, must not be {@code null}.
39 * @return The dependency manager for the dependencies of the target node, must not be {@code null}.
40 */
41 DependencyManager deriveChildManager( DependencyCollectionContext context );
42
43 }