How to use

ClassAdapter

in

org.objectweb.asm

public MethodVisitor visitMethod(int arg, String name, String descriptor, String signature, String[] exceptions) {
  if (Manager.isIgnoreGetSetMethod()) {
    if (fieldNameList.contains(name)) {
      return super.visitMethod(arg, name, descriptor, signature, exceptions);
    }
  }
  // 静态区域不注入
  if ("<clinit>".equals(name)) {
    return super.visitMethod(arg, name, descriptor, signature, exceptions);
  }
  MethodVisitor mv = super.visitMethod(arg, name, descriptor, signature, exceptions);
  MethodAdapter ma = new ProfMethodAdapter(mv, mFileName, mClassName, name);
  return ma;
}

public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
  super.visit(version, access, name, signature, superName, interfaces);
}

public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
  String up = name.substring(0, 1).toUpperCase() + name.substring(1, name.length());
  String getFieldName = "get" + up;
  String setFieldName = "set" + up;
  String isFieldName = "is" + up;
  fieldNameList.add(getFieldName);
  fieldNameList.add(setFieldName);
  fieldNameList.add(isFieldName);
  return super.visitField(access, name, desc, signature, value);
}

@Override
public void visitEnd() {
  if (!skipEnchancing) {
    super.visitField(
      (isInterface ? Opcodes.ACC_PUBLIC : Opcodes.ACC_PRIVATE) + Opcodes.ACC_FINAL + Opcodes.ACC_STATIC, 
      MaybeContinuableClassVisitor.MARKER_FIELD_NAME, 
      "Ljava/lang/String;", 
      null, 
      "A"
    ).visitEnd();
  }
  super.visitEnd();
}

@Override
public void visitEnd() {
  super.visitEnd();
}

public HeapClass(ClassVisitor cv,
         String classId,
         boolean suppressAuditing,
         boolean debugAuditing) {
  this.cv = new ClassAdapter(cv);
  this.id = classId;
  this.suppressClass = suppressAuditing;
  this.debugClass = debugAuditing;
  log(debugClass,
    "{ # CLASS " + id);
}

public void visitSource(final String source, final String debug) {
  super.visitSource(source, debug);
  mFileName = source;
}

public void visitEnd() {
  log(debugClass,
    "\tvisitEnd()\n}");
  cv.visitEnd();
}

final AtomicReference<Method> holder = new AtomicReference<Method>();
cr.accept(new ClassAdapter(empty){

  @Override
  public void visitSource(String source, String debug) {
    super.visitSource(sourceFile, debug);
  }
}

  public MethodVisitor visitMethod(int access, final String name, final String desc, final String signature, final String[] exceptions) {
    for ( String method : DEFINALIZE_LIST ) {
      if ( name.equals(method) ) {
        access &= ~ACC_FINAL;
        break;
      }
    }
    return super.visitMethod(access, name, desc, signature, exceptions);
  }
};

public void visit(
  final int version,
  final int access,
  final String name,
  final String signature,
  final String superName,
  final String[] interfaces)
{
  super.visit(version, access, name, null, superName, interfaces);
}

public FieldVisitor visitField(
  final int access,
  final String name,
  final String desc,
  final String signature,
  final Object value)
{
  return super.visitField(access, name, desc, null, value);
}

@Override
public void visitEnd() {
  final MappedSubtypeInfo mappedSubtype = className_to_subtype.get(className);
  generateViewAddressGetter();
  generateCapacity();
  generateAlignGetter(mappedSubtype);
  generateSizeofGetter();
  generateNext();
  for ( String fieldName : mappedSubtype.fields.keySet() ) {
    final FieldInfo field = mappedSubtype.fields.get(fieldName);
    if ( field.type.getDescriptor().length() > 1 ) {  // ByteBuffer, getter only
      generateByteBufferGetter(fieldName, field);
    } else {
      generateFieldGetter(fieldName, field);
      generateFieldSetter(fieldName, field);
    }
  }
  super.visitEnd();
}

reader.accept(new ClassAdapter(new EmptyVisitor()) {
  @Override
  public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {

public void visitSource(String source,
            String debug) {
  log(debugClass,
    "\tvisitSource(" + source + ", " + debug + ")");
  this.source = source;
  cv.visitSource(source,
          debug);
}

private void generateSizeofGetter() {
  MethodVisitor mv = super.visitMethod(ACC_PUBLIC, SIZEOF_METHOD_NAME, "()I", null, null);
  mv.visitCode();
  mv.visitFieldInsn(GETSTATIC, className, "SIZEOF", "I");
  mv.visitInsn(IRETURN);
  mv.visitMaxs(1, 1);
  mv.visitEnd();
}

@Override
public void visit(int version, int access, String name, String signature,
    String superName, String[] interfaces) {
  className = name;
  super.visit(version, access, name, signature, superName, interfaces);
}

@Override
public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
  if (MaybeContinuableClassVisitor.MARKER_FIELD_NAME.equals(name) && (access & Opcodes.ACC_STATIC) != 0) {
    skipEnchancing = true;
    classInfo.markClassProcessed();
    throw StopException.INSTANCE;
  }
  return super.visitField(access, name, desc, signature, value);
}

/**
 * @param source In the format "ClassInstrumenter.java"
 */
public void visitSource(String source, String debug)
{
  super.visitSource(source, debug);
  classData.setSourceFileName(source);
}