|
1
5 package com.tc.tomcat.transform;
6
7 import com.tc.asm.ClassAdapter;
8 import com.tc.asm.ClassVisitor;
9 import com.tc.asm.Label;
10 import com.tc.asm.MethodAdapter;
11 import com.tc.asm.MethodVisitor;
12 import com.tc.asm.Opcodes;
13 import com.tc.object.bytecode.ClassAdapterFactory;
14
15 public class ContainerBaseAdapter extends ClassAdapter implements Opcodes, ClassAdapterFactory {
16
17 public ContainerBaseAdapter() {
18 super(null);
19 }
20
21 private ContainerBaseAdapter(ClassVisitor cv, ClassLoader  caller) {
22 super(cv);
23 }
24
25 public ClassAdapter create(ClassVisitor visitor, ClassLoader loader) {
26 return new ContainerBaseAdapter(visitor, loader);
27 }
28
29 public MethodVisitor visitMethod(int access, String name, String desc, String signature, String [] exceptions) {
30 MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
31 if ("<init>".equals(name)) {
32 mv = new PipelineAdapter(mv);
33 }
34 return mv;
35 }
36
37 private static class PipelineAdapter extends MethodAdapter implements Opcodes {
38
39 public PipelineAdapter(MethodVisitor mv) {
40 super(mv);
41 }
42
43 public void visitFieldInsn(int opcode, String owner, String name, String desc) {
44 if (PUTFIELD == opcode) {
45 if ("org/apache/catalina/core/ContainerBase".equals(owner) && "pipeline".equals(name)) {
46
47 mv.visitVarInsn(ALOAD, 0);
49 mv.visitTypeInsn(INSTANCEOF, "org/apache/catalina/Engine");
50 Label notEngine = new Label();
51 mv.visitJumpInsn(IFEQ, notEngine);
52 mv.visitInsn(POP);
53 mv.visitVarInsn(ALOAD, 0);
54 mv.visitMethodInsn(INVOKESTATIC, "com/tc/tomcat/session/VersionHelper", "createTerracottaPipeline",
55 "(Lorg/apache/catalina/Container;)Lorg/apache/catalina/Pipeline;");
56 mv.visitLabel(notEngine);
57 }
58 }
59
60 super.visitFieldInsn(opcode, owner, name, desc);
61 }
62
63 }
64
65 }
66 |
Popular Tags |
Java API By Example, From Geeks To Geeks.