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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.util.graph.transformer;
20  
21  import org.eclipse.aether.RepositoryException;
22  import org.eclipse.aether.util.artifact.JavaScopes;
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 JavaScopes}.
28   */
29  public final class JavaScopeDeriver extends ScopeDeriver {
30  
31      /**
32       * Creates a new instance of this scope deriver.
33       */
34      public JavaScopeDeriver() {}
35  
36      @Override
37      public void deriveScope(ScopeContext context) throws RepositoryException {
38          context.setDerivedScope(getDerivedScope(context.getParentScope(), context.getChildScope()));
39      }
40  
41      private String getDerivedScope(String parentScope, String childScope) {
42          String derivedScope;
43  
44          if (JavaScopes.SYSTEM.equals(childScope) || JavaScopes.TEST.equals(childScope)) {
45              derivedScope = childScope;
46          } else if (parentScope == null || parentScope.isEmpty() || JavaScopes.COMPILE.equals(parentScope)) {
47              derivedScope = childScope;
48          } else if (JavaScopes.TEST.equals(parentScope) || JavaScopes.RUNTIME.equals(parentScope)) {
49              derivedScope = parentScope;
50          } else if (JavaScopes.SYSTEM.equals(parentScope) || JavaScopes.PROVIDED.equals(parentScope)) {
51              derivedScope = JavaScopes.PROVIDED;
52          } else {
53              derivedScope = JavaScopes.RUNTIME;
54          }
55  
56          return derivedScope;
57      }
58  }