AlreadyAddedMethodVisitor


1   /**************************************************************************************
2    * Copyright (c) Jonas Bon?r, Alexandre Vasseur. All rights reserved.                 *
3    * http://aspectwerkz.codehaus.org                                                    *
4    * ---------------------------------------------------------------------------------- *
5    * The software in this package is published under the terms of the LGPL license      *
6    * a copy of which has been included with this distribution in the license.txt file.  *
7    **************************************************************************************/
8   package org.codehaus.aspectwerkz.transform.inlining.weaver;
9   
10  import org.objectweb.asm.CodeVisitor;
11  import org.objectweb.asm.Attribute;
12  import org.codehaus.aspectwerkz.transform.TransformationConstants;
13  import org.codehaus.aspectwerkz.annotation.instrumentation.asm.AsmAnnotationHelper;
14  
15  import java.util.Set  ;
16  
17  /**
18   * A read only visitor to gather wrapper methods and proxy methods
19   * Makes use of the NullVisitors
20   *
21   * @author <a HREF="mailto:alex@gnilux.com">Alexandre Vasseur</a>
22   */
23  public class AlreadyAddedMethodVisitor extends AsmAnnotationHelper.NullClassAdapter implements TransformationConstants {
24  
25      /**
26       * Set of "<methodName><methodDesc>" strings populated with wrapper methods, prefixed originals
27       * and ctor body wrappers to allow multiweaving support.
28       */
29      private final Set   m_addedMethods;
30  
31      /**
32       * Creates a new class adapter.
33       *
34       * @param wrappers
35       */
36      public AlreadyAddedMethodVisitor(final Set   wrappers) {
37          m_addedMethods = wrappers;
38      }
39  
40      /**
41       * Visits the methods.
42       *
43       * @param access
44       * @param name
45       * @param desc
46       * @param exceptions
47       * @param attrs
48       * @return
49       */
50      public CodeVisitor visitMethod(final int access,
51                                     final String   name,
52                                     final String   desc,
53                                     final String  [] exceptions,
54                                     final Attribute attrs) {
55          if (name.startsWith(WRAPPER_METHOD_PREFIX) ||
56              name.startsWith(ORIGINAL_METHOD_PREFIX)) {
57              //FIXME do it for ctor exe wrapper
58              m_addedMethods.add(getMethodKey(name, desc));
59          }
60          return super.visitMethod(access, name, desc, exceptions, attrs);
61      }
62  
63      /**
64       * Returns the key of the method.
65       *
66       * @param name
67       * @param desc
68       * @return
69       */
70      static String   getMethodKey(final String   name, final String   desc) {
71          StringBuffer   sb = new StringBuffer  (name);
72          return sb.append(desc).toString();
73      }
74  }
75
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