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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.scopes;
20  
21  import org.eclipse.aether.RepositoryException;
22  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
23  import org.eclipse.aether.util.graph.transformer.ConflictResolver.ScopeContext;
24  import org.eclipse.aether.util.graph.transformer.ConflictResolver.ScopeDeriver;
25  
26  /**
27   * A scope deriver for use with {@link ConflictResolver} that supports the scopes from {@link MavenDependencyScopes}.
28   *
29   * @since 4.0.0
30   */
31  public final class MavenScopeDeriver extends ScopeDeriver {
32  
33      public MavenScopeDeriver() {}
34  
35      @Override
36      public void deriveScope(ScopeContext context) throws RepositoryException {
37          context.setDerivedScope(getDerivedScope(context.getParentScope(), context.getChildScope()));
38      }
39  
40      private String getDerivedScope(String parentScope, String childScope) {
41          String derivedScope;
42  
43          if (MavenDependencyScopes.SYSTEM.equals(childScope) || MavenDependencyScopes.TEST.equals(childScope)) {
44              derivedScope = childScope;
45          } else if (parentScope == null || parentScope.isEmpty() || MavenDependencyScopes.COMPILE.equals(parentScope)) {
46              derivedScope = childScope;
47          } else if (MavenDependencyScopes.TEST.equals(parentScope)
48                  || MavenDependencyScopes.RUNTIME.equals(parentScope)) {
49              derivedScope = parentScope;
50          } else if (MavenDependencyScopes.SYSTEM.equals(parentScope)
51                  || MavenDependencyScopes.PROVIDED.equals(parentScope)) {
52              derivedScope = MavenDependencyScopes.PROVIDED;
53          } else {
54              derivedScope = MavenDependencyScopes.RUNTIME;
55          }
56  
57          return derivedScope;
58      }
59  }