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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.shared.dependency.analyzer;
20  
21  import java.io.InputStream;
22  import java.util.HashSet;
23  import java.util.Set;
24  
25  /**
26   * Simply collects the set of visited classes.
27   *
28   * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
29   * @see #getClasses()
30   */
31  public class CollectorClassFileVisitor implements ClassFileVisitor {
32      private final Set<String> classes;
33  
34      /**
35       * <p>Constructor for CollectorClassFileVisitor.</p>
36       */
37      public CollectorClassFileVisitor() {
38          classes = new HashSet<>();
39      }
40  
41      /** {@inheritDoc} */
42      public void visitClass(String className, InputStream in) {
43          // inner classes have equivalent compilation requirement as container class
44          if (className.indexOf('$') < 0) {
45              classes.add(className);
46          }
47      }
48  
49      /**
50       * <p>Getter for the field <code>classes</code>.</p>
51       *
52       * @return a {@link java.util.Set} object.
53       */
54      public Set<String> getClasses() {
55          return classes;
56      }
57  }