/** 用于更新类名。 */
public void visit(
final int version,
final int access,
final String name,
final String signature,
final String superName,
final String[] interfaces) {
// 1.类名
this.superClassName = name;
String className = this.classConfig.getClassName();
className = classConfig.getClassName().replace(".", "/");
// 2.确定接口
Set<String> newFaces = new HashSet<String>();
for (String faces : interfaces) {
newFaces.add(faces);
}
InnerMethodDelegateDefine[] defineArrays = this.classConfig.getNewDelegateList();
for (InnerMethodDelegateDefine define : defineArrays) {
Class<?> faceType = define.getFaces();
newFaces.add(ASMEngineTools.replaceClassName(faceType));
}
String[] finalInterfaces = newFaces.toArray(new String[newFaces.size()]);
//
super.visit(version, access, className, signature, name, finalInterfaces);
}
private void visitConstruction(MethodVisitor mv, String name, String desc) {
// 1.准备输出方法数据
Pattern p = Pattern.compile("\\((.*)\\)(.*)");
Matcher m = p.matcher(desc);
m.find();
String[] asmParams =
ASMEngineTools.splitAsmType(
m.group(1)); // "IIIILjava/lang/Integer;F[[[ILjava/lang.Boolean;"
int paramCount = asmParams.length;
//
mv.visitVarInsn(ALOAD, 0);
for (int i = 0; i < paramCount; i++) {
String asmType = asmParams[i];
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
}
mv.visitMethodInsn(INVOKESPECIAL, this.superClassName, name, desc);
mv.visitInsn(RETURN);
mv.visitMaxs(paramCount + 1, paramCount + 1);
}
public void visitEnd() {
InnerMethodDelegateDefine[] defineArrays = this.classConfig.getNewDelegateList();
for (InnerMethodDelegateDefine define : defineArrays) {
Class<?> faceType = define.getFaces();
Method[] faceMethods = faceType.getMethods();
for (Method tMethod : faceMethods) {
String mName = tMethod.getName();
String typeDesc =
String.format("%s(%s)", mName, ASMEngineTools.toAsmType(tMethod.getParameterTypes()));
//
if (this.validMethod.contains(typeDesc) == false) {
String desc = ASMEngineTools.toAsmDesc(tMethod);
MethodVisitor mv = super.visitMethod(ACC_PUBLIC, mName, desc, null, null);
mv.visitCode();
this.buildInterfaceMethod(mv, mName, desc, faceType);
mv.visitEnd();
}
//
}
//
}
super.visitEnd();
}
// Code Builder “return ...”
private void codeBuilder_3(MethodVisitor mv, String asmReturns) {
if (asmReturns.equals("B") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Byte");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Byte", "byteValue", "()B");
mv.visitInsn(ASMEngineTools.getReturn("B"));
} else if (asmReturns.equals("S") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Short");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Short", "shortValue", "()S");
mv.visitInsn(ASMEngineTools.getReturn("S"));
} else if (asmReturns.equals("I") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Integer");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I");
mv.visitInsn(ASMEngineTools.getReturn("I"));
} else if (asmReturns.equals("J") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Long");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J");
mv.visitInsn(ASMEngineTools.getReturn("J"));
} else if (asmReturns.equals("F") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Float");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Float", "floatValue", "()F");
mv.visitInsn(ASMEngineTools.getReturn("F"));
} else if (asmReturns.equals("D") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Double");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Double", "doubleValue", "()D");
mv.visitInsn(ASMEngineTools.getReturn("D"));
} else if (asmReturns.equals("C") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Character");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Character", "charValue", "()C");
mv.visitInsn(ASMEngineTools.getReturn("C"));
} else if (asmReturns.equals("Z") == true) {
mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Boolean");
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z");
mv.visitInsn(ASMEngineTools.getReturn("Z"));
} else if (asmReturns.equals("V") == true) {
mv.visitInsn(Opcodes.POP);
mv.visitInsn(Opcodes.RETURN);
} else {
mv.visitTypeInsn(Opcodes.CHECKCAST, ASMEngineTools.asmTypeToType(asmReturns));
mv.visitInsn(Opcodes.ARETURN);
}
}
//
// Code Builder “new Object[] { abc, abcc, abcc };”
private void codeBuilder_1(MethodVisitor mv, String[] asmParams) {
int paramCount = asmParams.length;
mv.visitIntInsn(Opcodes.BIPUSH, paramCount);
mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
for (int i = 0; i < paramCount; i++) {
String asmType = asmParams[i];
mv.visitInsn(Opcodes.DUP);
mv.visitIntInsn(Opcodes.BIPUSH, i);
if (asmParams[i].equals("B") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;");
} else if (asmParams[i].equals("S") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;");
} else if (asmParams[i].equals("I") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;");
} else if (asmParams[i].equals("J") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;");
} else if (asmParams[i].equals("F") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;");
} else if (asmParams[i].equals("D") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;");
} else if (asmParams[i].equals("C") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;");
} else if (asmParams[i].equals("Z") == true) {
mv.visitVarInsn(ASMEngineTools.getLoad(asmType), i + 1);
mv.visitMethodInsn(
Opcodes.INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;");
} else {
mv.visitVarInsn(Opcodes.ALOAD, i + 1);
}
mv.visitInsn(Opcodes.AASTORE);
}
}
// 实现接口附加
private void buildInterfaceMethod(MethodVisitor mv, String name, String desc, Class<?> faceType) {
// 例子代码
// public int getNames(int abc, Object abcc) {
// try {
// Class<?>[] arrayOfClass = new Class[] { int.class, Object.class };
// Object[] arrayOfObject = new Object[] { abc, abcc };
// //
// Method localMethod = List.class.getMethod("getNames", arrayOfClass);
// ClassLoader localLoader = getClass().getClassLoader();
// //
// Object target = new InnerChainMethodDelegate("xxxx",
// localLoader).invoke(localMethod, this, arrayOfObject);
// return ((Integer) target).intValue();
// } catch (Throwable e) {
// throw new RuntimeException(e);
// }
// }
// 1.准备输出方法数据
Pattern p = Pattern.compile("\\((.*)\\)(.*)");
Matcher m = p.matcher(desc);
m.find();
String[] asmParams =
ASMEngineTools.splitAsmType(
m.group(1)); // "IIIILjava/lang/Integer;F[[[ILjava/lang.Boolean;"
String asmReturns = m.group(2);
int paramCount = asmParams.length;
int maxStack = 4; // 方法最大堆栈大小
int maxLocals = paramCount + 5; // 本地变量表大小
//
Label tryBegin = new Label();
Label tryEnd = new Label();
Label tryCatch = new Label();
mv.visitTryCatchBlock(tryBegin, tryEnd, tryCatch, "java/lang/Throwable");
{ // try {
mv.visitLabel(tryBegin);
// Class<?>[] pTypes = new Class[] { int.class, Object.class, boolean.class, short.class };
this.codeBuilder_2(mv, asmParams);
mv.visitVarInsn(ASTORE, paramCount + 2);
// Object[] pObjects = new Object[] { abc, abcc, abcc };
this.codeBuilder_1(mv, asmParams);
mv.visitVarInsn(ASTORE, paramCount + 3);
//
// List.class.getMethod("getNames", arrayOfClass);
mv.visitLdcInsn(Type.getType(ASMEngineTools.toAsmType(faceType)));
mv.visitLdcInsn(name);
mv.visitVarInsn(ALOAD, paramCount + 2);
mv.visitMethodInsn(
INVOKEVIRTUAL,
"java/lang/Class",
"getMethod",
"(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;");
mv.visitVarInsn(ASTORE, paramCount + 4);
//
// ClassLoader localLoader = getClass().getClassLoader();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;");
mv.visitMethodInsn(
INVOKEVIRTUAL, "java/lang/Class", "getClassLoader", "()Ljava/lang/ClassLoader;");
mv.visitVarInsn(ASTORE, paramCount + 5);
//
// Object target = new InnerChainMethodDelegate("xxxx", localLoader).invoke(localMethod, this,
// arrayOfObject);
mv.visitTypeInsn(NEW, ASMEngineTools.replaceClassName(InnerChainMethodDelegate.class));
mv.visitInsn(DUP);
mv.visitLdcInsn(this.classConfig.getClassName());
mv.visitLdcInsn(faceType.getName());
mv.visitVarInsn(ALOAD, paramCount + 5);
mv.visitMethodInsn(
INVOKESPECIAL,
ASMEngineTools.replaceClassName(InnerChainMethodDelegate.class),
"<init>",
"(Ljava/lang/String;Ljava/lang/String;Ljava/lang/ClassLoader;)V");
mv.visitVarInsn(ALOAD, paramCount + 4);
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, paramCount + 3);
mv.visitMethodInsn(
INVOKEVIRTUAL,
ASMEngineTools.replaceClassName(InnerChainMethodDelegate.class),
"invoke",
"(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
mv.visitVarInsn(ASTORE, paramCount + 6);
//
// return
mv.visitVarInsn(ALOAD, paramCount + 6);
mv.visitLabel(tryEnd);
this.codeBuilder_3(mv, asmReturns);
}
{ // } catch (Exception e) {
mv.visitLabel(tryCatch);
mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/Throwable"});
mv.visitVarInsn(ASTORE, 5);
mv.visitVarInsn(ALOAD, 5);
mv.visitTypeInsn(INSTANCEOF, "java/lang/RuntimeException");
Label ifBlock = new Label();
mv.visitJumpInsn(IFEQ, ifBlock);
mv.visitVarInsn(ALOAD, 5);
mv.visitTypeInsn(CHECKCAST, "java/lang/RuntimeException");
mv.visitInsn(ATHROW);
mv.visitLabel(ifBlock);
mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {"java/lang/Throwable"}, 0, null);
mv.visitTypeInsn(NEW, "java/lang/RuntimeException");
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(
INVOKESPECIAL, "java/lang/RuntimeException", "<init>", "(Ljava/lang/Throwable;)V");
mv.visitInsn(ATHROW);
mv.visitMaxs(maxStack, maxLocals);
} // }
}
