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Java > Open Source Codes > com > tc > object > bytecode > HashMapAdapter


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.object.bytecode;
5
6
7 import com.tc.asm.ClassVisitor;
8 import com.tc.asm.MethodAdapter;
9 import com.tc.asm.MethodVisitor;
10 import com.tc.asm.Opcodes;
11 import com.tcclient.util.MapEntrySetWrapper;
12
13 public class HashMapAdapter {
14
15   public static class EntrySetAdapter extends AbstractMethodAdapter {
16
17     public MethodVisitor adapt(ClassVisitor classVisitor) {
18       MethodVisitor mv = visitOriginal(classVisitor);
19       if ("entrySet".equals(methodName)) {
20         return new Adapter(mv);
21       }
22       return mv;
23     }
24
25     public boolean doesOriginalNeedAdapting() {
26       return false;
27     }
28     
29     private static class Adapter extends MethodAdapter implements Opcodes {
30
31       public Adapter(MethodVisitor mv) {
32         super(mv);
33       }
34
35       public void visitMethodInsn(int opcode, String JavaDoc owner, String JavaDoc name, String JavaDoc desc) {
36         super.visitMethodInsn(opcode, owner, name, desc);
37
38         if ((opcode == INVOKESPECIAL)) {
39           mv.visitVarInsn(ASTORE, 1);
40           mv.visitTypeInsn(NEW, MapEntrySetWrapper.CLASS_SLASH);
41           mv.visitInsn(DUP);
42           mv.visitVarInsn(ALOAD, 0);
43           mv.visitVarInsn(ALOAD, 1);
44           mv.visitMethodInsn(INVOKESPECIAL, MapEntrySetWrapper.CLASS_SLASH, "<init>",
45                              "(Ljava/util/Map;Ljava/util/Set;)V");
46         }
47       }
48
49     }
50
51   }
52
53 }
54
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