1 package org.apache.maven.shared.dependency.analyzer.asm;
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.io.IOException;
23 import java.io.InputStream;
24 import java.util.HashSet;
25 import java.util.Set;
26
27 import org.apache.maven.shared.dependency.analyzer.ClassFileVisitor;
28 import org.objectweb.asm.ClassReader;
29
30 /**
31 *
32 *
33 * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
34 * @version $Id: DependencyClassFileVisitor.java 661727 2008-05-30 14:21:49Z bentmann $
35 */
36 public class DependencyClassFileVisitor
37 implements ClassFileVisitor
38 {
39 // fields -----------------------------------------------------------------
40
41 private final Set dependencies;
42
43 // constructors -----------------------------------------------------------
44
45 public DependencyClassFileVisitor()
46 {
47 dependencies = new HashSet();
48 }
49
50 // ClassFileVisitor methods -----------------------------------------------
51
52 /*
53 * @see org.apache.maven.shared.dependency.analyzer.ClassFileVisitor#visitClass(java.lang.String,
54 * java.io.InputStream)
55 */
56 public void visitClass( String className, InputStream in )
57 {
58 try
59 {
60 ClassReader reader = new ClassReader( in );
61 DependencyVisitor visitor = new DependencyVisitor();
62
63 reader.accept( visitor, 0 );
64
65 dependencies.addAll( visitor.getClasses() );
66 }
67 catch ( IOException exception )
68 {
69 exception.printStackTrace();
70 }
71 catch (IndexOutOfBoundsException e)
72 {
73 //some bug inside ASM causes an IOB exception. Log it and move on?
74 //this happens when the class isn't valid.
75 System.out.println("Unable to process: "+ className);
76 }
77 }
78
79 // public methods ---------------------------------------------------------
80
81 public Set getDependencies()
82 {
83 return dependencies;
84 }
85 }