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);
}
// 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);
} // }
}
