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.metadata;
20
21 import org.apache.maven.artifact.ArtifactScopeEnum;
22
23 /**
24 * Resolves conflicts in the supplied dependency graph.
25 * Different implementations will implement different conflict resolution policies.
26 *
27 * @author <a href="mailto:oleg@codehaus.org">Oleg Gusakov</a>
28 */
29 public interface GraphConflictResolver {
30 String ROLE = GraphConflictResolver.class.getName();
31
32 /**
33 * Cleanses the supplied graph by leaving only one directed versioned edge\
34 * between any two nodes, if multiple exists. Uses scope relationships, defined
35 * in <code>ArtifactScopeEnum</code>
36 *
37 * @param graph the "dirty" graph to be simplified via conflict resolution
38 * @param scope scope for which the graph should be resolved
39 *
40 * @return resulting "clean" graph for the specified scope
41 *
42 * @since 3.0
43 */
44 MetadataGraph resolveConflicts(MetadataGraph graph, ArtifactScopeEnum scope)
45 throws GraphConflictResolutionException;
46 }