AlreadyAddedMethodAdapter


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   import com.tc.asm.Opcodes;
10  
11  import com.tc.aspectwerkz.transform.TransformationConstants;
12  import com.tc.aspectwerkz.transform.inlining.AsmNullAdapter;
13  
14  /**
15   * A read only visitor to gather wrapper methods and proxy methods
16   * Makes use of the NullVisitors
17   *
18   * @author <a HREF="mailto:alex@gnilux.com">Alexandre Vasseur</a>
19   */
20  public class AlreadyAddedMethodAdapter extends AsmNullAdapter.NullClassAdapter implements Opcodes, TransformationConstants {
21  
22    /**
23     * Set of "<methodName><methodDesc>" strings populated with wrapper methods, prefixed originals
24     * and ctor body wrappers to allow multiweaving support.
25     */
26    private final Set   m_addedMethods;
27  
28    /**
29     * Creates a new class adapter.
30     *
31     * @param wrappers
32     */
33    public AlreadyAddedMethodAdapter(final Set   wrappers) {
34      m_addedMethods = wrappers;
35    }
36  
37    /**
38     * Visits the methods.
39     *
40     * @param access
41     * @param name
42     * @param desc
43     * @param signature
44     * @param exceptions
45     * @return
46     */
47    public MethodVisitor visitMethod(final int access,
48                                     final String   name,
49                                     final String   desc,
50                                     final String   signature,
51                                     final String  [] exceptions) {
52      if (name.startsWith(WRAPPER_METHOD_PREFIX)
53              || name.startsWith(ORIGINAL_METHOD_PREFIX)) {
54        m_addedMethods.add(getMethodKey(name, desc));
55      }
56      return super.visitMethod(access, name, desc, signature, exceptions);
57    }
58  
59    static String   getMethodKey(String   name, String   desc) {
60      StringBuffer   sb = new StringBuffer  (name);
61      return sb.append(desc).toString();
62    }
63  }
64
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