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1
4 package com.tc.object.bytecode;
5
6 import com.tc.asm.ClassAdapter;
7 import com.tc.asm.ClassVisitor;
8 import com.tc.asm.MethodVisitor;
9 import com.tc.asm.Opcodes;
10 import com.tc.asm.Type;
11 import com.tc.exception.TCRuntimeException;
12
13 import java.util.HashSet  ;
14 import java.util.Set ;
15
16 public class JavaLangReflectArrayAdapter extends ClassAdapter implements Opcodes, ClassAdapterFactory {
17 private final static Set nonNativeMethods = new HashSet (2);
18 private final static Set excludeMethods = new HashSet (2);
19
20 static {
21 nonNativeMethods.add("newInstance");
22 nonNativeMethods.add("<init>");
23
24 excludeMethods.add("getLength");
25 excludeMethods.add("getByte");
26 excludeMethods.add("getBoolean");
27 excludeMethods.add("getChar");
28 excludeMethods.add("getDouble");
29 excludeMethods.add("getFloat");
30 excludeMethods.add("getInt");
31 excludeMethods.add("getLong");
32 excludeMethods.add("getShort");
33 }
34
35 public JavaLangReflectArrayAdapter() {
36 super(null);
37 }
38
39 private JavaLangReflectArrayAdapter(ClassVisitor cv, ClassLoader caller) {
40 super(cv);
41 }
42
43 public ClassAdapter create(ClassVisitor visitor, ClassLoader loader) {
44 return new JavaLangReflectArrayAdapter(visitor, loader);
45 }
46
47 private boolean isNative(int access) {
48 return (access & Opcodes.ACC_NATIVE) == Opcodes.ACC_NATIVE;
49 }
50
51 private boolean isPrivate(int access) {
52 return (access & Opcodes.ACC_PRIVATE) == Opcodes.ACC_PRIVATE;
53 }
54
55 public MethodVisitor visitMethod(int access, String name, String description, String signature, String [] exceptions) {
56 if (!isNative(access)) {
57 if (!nonNativeMethods.contains(name)) {
58 throw new TCRuntimeException("Unexpected non-native method: " + name + description);
59 } else {
60 return super.visitMethod(access, name, description, signature, exceptions);
61 }
62 }
63
64 if (isPrivate(access)) {
65 return super.visitMethod(access, name, description, signature, exceptions);
66 } else if (isNative(access) && !excludeMethods.contains(name)) {
67 MethodVisitor mv = super.visitMethod(access ^ Opcodes.ACC_NATIVE, name, description, signature, exceptions);
68 addArrayUtilMethodCode(mv, name, description);
69 return mv;
70 } else {
71 return super.visitMethod(access, name, description, signature, exceptions);
72 }
73 }
74
75 private void addArrayUtilMethodCode(MethodVisitor mv, String methodName, String description) {
76 mv.visitCode();
77
78 Type[] params = Type.getArgumentTypes(description);
79 Type returnType = Type.getReturnType(description);
80 for (int i = 0; i < params.length; i++) {
81 mv.visitVarInsn(params[i].getOpcode(ILOAD), i);
82 }
83 mv.visitMethodInsn(INVOKESTATIC, ManagerUtil.CLASS, methodName, description);
84 mv.visitInsn(returnType.getOpcode(IRETURN));
85 mv.visitMaxs(0, 0);
86 mv.visitEnd();
87 }
88
89 }
90 |
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