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1   package org.apache.maven.shared.artifact.filter.resolve;
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 java.util.Arrays;
23  import java.util.Collection;
24  import java.util.Collections;
25  
26  /**
27   * Filter based on scope. <strong>Note:</strong> There's no logic for inherited scoped
28   * 
29   * @author Robert Scholte
30   * @since 3.0
31   * 
32   * @see org.sonatype.aether.util.filter.ScopeDependencyFilter
33   * @see org.eclipse.aether.util.filter.ScopeDependencyFilter
34   */
35  public class ScopeFilter implements TransformableFilter
36  {
37      private final Collection<String> excluded;
38  
39      private final Collection<String> included;
40  
41      /**
42       * 
43       * @param included specific scopes to include or {@code null} to include all
44       * @param excluded specific scopes to exclude or {@code null} to exclude none
45       */
46      public ScopeFilter( Collection<String> included, Collection<String> excluded )
47      {
48          this.included = ( included == null ? null : Collections.unmodifiableCollection( included ) );
49          this.excluded = ( excluded == null ? null : Collections.unmodifiableCollection( excluded ) );
50      }
51      
52      /**
53       * Construct a ScopeFilter based on included scopes  
54       * 
55       * @param included the scopes to include, may be {@code null}
56       * @return the filter, never {@code null}
57       */
58      public static ScopeFilter including( Collection<String> included ) 
59      {
60          return new ScopeFilter( included, null );
61      }
62  
63      /**
64       * Construct a ScopeFilter based on included scopes  
65       * 
66       * @param included the scopes to include, must not be {@code null}
67       * @return the filter, never {@code null}
68       */
69      public static ScopeFilter including( String... included ) 
70      {
71          return new ScopeFilter( Arrays.asList( included ), null );
72      }
73  
74      /**
75       * Construct a ScopeFilter based on excluded scopes
76       * 
77       * @param excluded the scopes to exclude, may be {@code null}
78       * @return the filter, never {@code null}
79       */
80      public static ScopeFilter excluding( Collection<String> excluded ) 
81      {
82          return new ScopeFilter( null, excluded );
83      }
84  
85      /**
86       * Construct a ScopeFilter based on excluded scopes
87       * 
88       * @param excluded the scopes to exclude, must not be {@code null}
89       * @return the filter, never {@code null}
90       */
91      public static ScopeFilter excluding( String... excluded ) 
92      {
93          return new ScopeFilter( null, Arrays.asList( excluded ) );
94      }
95  
96      /**
97       * Get the excluded scopes
98       * 
99       * @return the scopes to exclude, may be {@code null}
100      */
101     public final Collection<String> getExcluded()
102     {
103         return excluded;
104     }
105     
106     /**
107      * Get the included scopes
108      * 
109      * @return the scopes to include, may be {@code null}
110      */
111     public final Collection<String> getIncluded()
112     {
113         return included;
114     }
115     
116     /**
117      * Transform this filter to a tool specific implementation
118      * 
119      * @param <T> The type to be used.
120      * @param transformer the transformer, must not be {@code null}
121      * @return T.
122      */
123     public <T> T transform ( FilterTransformer<T> transformer )
124     {
125         return transformer.transform( this );
126     }
127 }