AlreadyAddedMethodVisitor


1   /*
2    * All content copyright (c) 2003-2006 Terracotta, Inc., except as may otherwise be noted in a separate copyright notice.  All rights reserved.
3    */
4   package com.tc.aspectwerkz.transform.inlining.weaver;
5   
6   import java.util.Set  ;
7   
8   import com.tc.asm.MethodVisitor;
9   
10  import com.tc.aspectwerkz.transform.TransformationConstants;
11  import com.tc.aspectwerkz.transform.inlining.AsmNullAdapter;
12  
13  /**
14   * A read only visitor to gather wrapper methods and proxy methods
15   * Makes use of the NullVisitors
16   *
17   * @author <a HREF="mailto:alex@gnilux.com">Alexandre Vasseur</a>
18   */
19  public class AlreadyAddedMethodVisitor extends AsmNullAdapter.NullClassAdapter implements TransformationConstants {
20  
21    /**
22     * Set of "<methodName><methodDesc>" strings populated with wrapper methods, prefixed originals
23     * and ctor body wrappers to allow multiweaving support.
24     */
25    private final Set   m_addedMethods;
26  
27    /**
28     * Creates a new class adapter.
29     *
30     * @param wrappers
31     */
32    public AlreadyAddedMethodVisitor(final Set   wrappers) {
33      m_addedMethods = wrappers;
34    }
35  
36    /**
37     * Visits the methods.
38     *
39     * @param access
40     * @param name
41     * @param desc
42     * @param signature
43     * @param exceptions
44     * @return
45     */
46    public MethodVisitor visitMethod(final int access,
47                                     final String   name,
48                                     final String   desc,
49                                     final String   signature,
50                                     final String  [] exceptions) {
51      if (name.startsWith(WRAPPER_METHOD_PREFIX) ||
52              name.startsWith(ORIGINAL_METHOD_PREFIX)) {
53        m_addedMethods.add(getMethodKey(name, desc));
54      }
55      return super.visitMethod(access, name, desc, signature, exceptions);
56    }
57  
58    /**
59     * Returns the key of the method.
60     *
61     * @param name
62     * @param desc
63     * @return
64     */
65    static String   getMethodKey(final String   name, final String   desc) {
66      StringBuffer   sb = new StringBuffer  (name);
67      return sb.append(desc).toString();
68    }
69  }
70
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