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1
5 package com.tc.object.loaders;
6
7 import com.tc.asm.ClassAdapter;
8 import com.tc.asm.ClassVisitor;
9 import com.tc.asm.Label;
10 import com.tc.asm.MethodVisitor;
11 import com.tc.asm.Opcodes;
12 import com.tc.object.bytecode.ByteCodeUtil;
13 import com.tc.object.bytecode.ClassAdapterFactory;
14
15
18 public class NamedLoaderAdapter extends ClassAdapter implements Opcodes, ClassAdapterFactory {
19
20 private static final String  LOADER_NAME_FIELD = ByteCodeUtil.TC_FIELD_PREFIX + "loaderName";
21 private String owner;
22
23 public NamedLoaderAdapter() {
24 super(null);
25 }
26
27 private NamedLoaderAdapter(ClassVisitor cv, ClassLoader caller) {
28 super(cv);
29 }
30
31 public ClassAdapter create(ClassVisitor visitor, ClassLoader loader) {
32 return new NamedLoaderAdapter(visitor, loader);
33 }
34
35 public void visit(int version, int access, String name, String signature, String superName, String [] interfaces) {
36 interfaces = ByteCodeUtil.addInterfaces(interfaces, new String [] { NamedClassLoader.CLASS });
37 super.visit(version, access, name, signature, superName, interfaces);
38 this.owner = name;
39 }
40
41 public void visitEnd() {
42 super.visitField(ACC_SYNTHETIC | ACC_VOLATILE | ACC_TRANSIENT | ACC_PRIVATE, LOADER_NAME_FIELD,
43 "Ljava/lang/String;", null, null);
44
45 MethodVisitor mv = super.visitMethod(ACC_PUBLIC | ACC_SYNTHETIC, "__tc_setClassLoaderName",
46 "(Ljava/lang/String;)V", null, null);
47 mv.visitVarInsn(ALOAD, 0);
48 mv.visitVarInsn(ALOAD, 1);
49 mv.visitFieldInsn(PUTFIELD, owner, LOADER_NAME_FIELD, "Ljava/lang/String;");
50 mv.visitInsn(RETURN);
51 mv.visitMaxs(0, 0);
52 mv.visitEnd();
53
54 mv = super.visitMethod(ACC_PUBLIC | ACC_SYNTHETIC, "__tc_getClassLoaderName", "()Ljava/lang/String;", null, null);
55 mv.visitCode();
56 mv.visitVarInsn(ALOAD, 0);
57 mv.visitFieldInsn(GETFIELD, owner, LOADER_NAME_FIELD, "Ljava/lang/String;");
58 Label l1 = new Label();
59 mv.visitJumpInsn(IFNONNULL, l1);
60 mv.visitTypeInsn(NEW, "java/lang/IllegalStateException");
61 mv.visitInsn(DUP);
62 mv.visitTypeInsn(NEW, "java/lang/StringBuffer");
63 mv.visitInsn(DUP);
64 mv
65 .visitLdcInsn("Classloader name not set, instances defined from this loader not supported in Terracotta (loader: ");
66 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuffer", "<init>", "(Ljava/lang/String;)V");
67 mv.visitVarInsn(ALOAD, 0);
68 mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;");
69 mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getName", "()Ljava/lang/String;");
70 mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuffer", "append",
71 "(Ljava/lang/String;)Ljava/lang/StringBuffer;");
72 mv.visitLdcInsn(")");
73 mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuffer", "append",
74 "(Ljava/lang/String;)Ljava/lang/StringBuffer;");
75 mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuffer", "toString", "()Ljava/lang/String;");
76 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalStateException", "<init>", "(Ljava/lang/String;)V");
77 mv.visitInsn(ATHROW);
78 mv.visitLabel(l1);
79 mv.visitVarInsn(ALOAD, 0);
80 mv.visitFieldInsn(GETFIELD, owner, LOADER_NAME_FIELD, "Ljava/lang/String;");
81 mv.visitInsn(ARETURN);
82 mv.visitMaxs(0, 0);
83 mv.visitEnd();
84
85 super.visitEnd();
86 }
87
88 String __tc_loaderName;
89
90 String get() {
91 if (__tc_loaderName == null) {
92 throw new IllegalStateException (
94 "Classloader name not set, instances defined from this loader not supported in Terracotta (loader: "
95 + getClass().getName() + ")");
96 }
97 return __tc_loaderName;
98 }
99
100 }
101 |
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