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1   package org.eclipse.aether.util.graph.transformer;
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.eclipse.aether.RepositoryException;
23  import org.eclipse.aether.util.artifact.JavaScopes;
24  import org.eclipse.aether.util.graph.transformer.ConflictResolver.ScopeContext;
25  import org.eclipse.aether.util.graph.transformer.ConflictResolver.ScopeDeriver;
26  
27  /**
28   * A scope deriver for use with {@link ConflictResolver} that supports the scopes from {@link JavaScopes}.
29   */
30  public final class JavaScopeDeriver
31      extends ScopeDeriver
32  {
33  
34      /**
35       * Creates a new instance of this scope deriver.
36       */
37      public JavaScopeDeriver()
38      {
39      }
40  
41      @Override
42      public void deriveScope( ScopeContext context )
43          throws RepositoryException
44      {
45          context.setDerivedScope( getDerivedScope( context.getParentScope(), context.getChildScope() ) );
46      }
47  
48      private String getDerivedScope( String parentScope, String childScope )
49      {
50          String derivedScope;
51  
52          if ( JavaScopes.SYSTEM.equals( childScope ) || JavaScopes.TEST.equals( childScope ) )
53          {
54              derivedScope = childScope;
55          }
56          else if ( parentScope == null || parentScope.length() <= 0 || JavaScopes.COMPILE.equals( parentScope ) )
57          {
58              derivedScope = childScope;
59          }
60          else if ( JavaScopes.TEST.equals( parentScope ) || JavaScopes.RUNTIME.equals( parentScope ) )
61          {
62              derivedScope = parentScope;
63          }
64          else if ( JavaScopes.SYSTEM.equals( parentScope ) || JavaScopes.PROVIDED.equals( parentScope ) )
65          {
66              derivedScope = JavaScopes.PROVIDED;
67          }
68          else
69          {
70              derivedScope = JavaScopes.RUNTIME;
71          }
72  
73          return derivedScope;
74      }
75  
76  }