/**
   * Handles the arguments to the before advice.
   *
   * @param cv
   * @param adviceMethodInfo
   * @param joinPointInstanceIndex
   */
  public void createBeforeAdviceArgumentHandling(
      final MethodVisitor cv,
      final AdviceMethodInfo adviceMethodInfo,
      final int joinPointInstanceIndex) {
    final String joinPointClassName = adviceMethodInfo.getJoinPointClassName();
    final int joinPointIndex = joinPointInstanceIndex;
    cv.visitFieldInsn(
        GETSTATIC, joinPointClassName, SIGNATURE_FIELD_NAME, METHOD_SIGNATURE_IMPL_CLASS_SIGNATURE);
    cv.visitMethodInsn(
        INVOKEVIRTUAL,
        METHOD_SIGNATURE_IMPL_CLASS_NAME,
        GET_METHOD_METHOD_NAME,
        GET_METHOD_METHOD_SIGNATURE);

    if (Type.getArgumentTypes(adviceMethodInfo.getCalleeMemberDesc()).length == 0) {
      cv.visitInsn(ACONST_NULL);
    } else {
      cv.visitVarInsn(ALOAD, joinPointIndex);
      cv.visitMethodInsn(
          INVOKEVIRTUAL, joinPointClassName, GET_RTTI_METHOD_NAME, GET_RTTI_METHOD_SIGNATURE);
      cv.visitTypeInsn(CHECKCAST, METHOD_RTTI_IMPL_CLASS_NAME);
      cv.visitMethodInsn(
          INVOKEVIRTUAL,
          METHOD_RTTI_IMPL_CLASS_NAME,
          GET_PARAMETER_VALUES_METHOD_NAME,
          GET_ARGUMENTS_METHOD_SIGNATURE);
    }
    cv.visitVarInsn(ALOAD, joinPointIndex);
    cv.visitFieldInsn(
        GETFIELD,
        joinPointClassName,
        CALLEE_INSTANCE_FIELD_NAME,
        adviceMethodInfo.getCalleeClassSignature());
  }
 public void createBeforeOrAfterAdviceArgumentHandling(
     MethodVisitor methodVisitor,
     CompilerInput compilerInput,
     Type[] types,
     AdviceMethodInfo adviceMethodInfo,
     int i) {
   if (AdviceType.BEFORE.equals(adviceMethodInfo.getAdviceInfo().getType())) {
     createBeforeAdviceArgumentHandling(
         methodVisitor, adviceMethodInfo, compilerInput.joinPointInstanceIndex);
   } else {
     // after advice no matter what
     createAfterAdviceArgumentHandling(
         methodVisitor, adviceMethodInfo, compilerInput.joinPointInstanceIndex);
   }
 }