class GenericFilter implements Filter, Filter.Listener {

    @Override
    public Result invoke(Invoker<?> invoker, Invocation inv) throws RpcException {
        if ((inv.getMethodName().equals($INVOKE) || inv.getMethodName().equals($INVOKE_ASYNC))
                && inv.getArguments() != null
                && inv.getArguments().length == 3
                && !GenericService.class.isAssignableFrom(invoker.getInterface())) {
            String name = ((String) inv.getArguments()[0]).trim();
            String[] types = (String[]) inv.getArguments()[1];
            Object[] args = (Object[]) inv.getArguments()[2];
            try {
                Method method = ReflectUtils.findMethodByMethodSignature(invoker.getInterface(), name, types);
                Class<?>[] params = method.getParameterTypes();
                if (args == null) {
                    args = new Object[params.length];
                }

                if(types == null) {
                    types = new String[params.length];
                }

                if (args.length != types.length) {
                    throw new RpcException("GenericFilter#invoke args.length != types.length, please check your "
                            + "params");
                }
                String generic = inv.getAttachment(GENERIC_KEY);

                if (StringUtils.isBlank(generic)) {
                    generic = RpcContext.getContext().getAttachment(GENERIC_KEY);
                }

                if (StringUtils.isEmpty(generic)
                        || ProtocolUtils.isDefaultGenericSerialization(generic)
                        || ProtocolUtils.isGenericReturnRawResult(generic)) {
                    args = PojoUtils.realize(args, params, method.getGenericParameterTypes());
                } else if (ProtocolUtils.isJavaGenericSerialization(generic)) {
                    for (int i = 0; i < args.length; i++) {
                        if (byte[].class == args[i].getClass()) {
                            try (UnsafeByteArrayInputStream is = new UnsafeByteArrayInputStream((byte[]) args[i])) {
                                args[i] = ExtensionLoader.getExtensionLoader(Serialization.class)
                                        .getExtension(GENERIC_SERIALIZATION_NATIVE_JAVA)
                                        .deserialize(null, is).readObject();
                            } catch (Exception e) {
                                throw new RpcException("Deserialize argument [" + (i + 1) + "] failed.", e);
                            }
                        } else {
                            throw new RpcException(
                                    "Generic serialization [" +
                                            GENERIC_SERIALIZATION_NATIVE_JAVA +
                                            "] only support message type " +
                                            byte[].class +
                                            " and your message type is " +
                                            args[i].getClass());
                        }
                    }
                } else if (ProtocolUtils.isBeanGenericSerialization(generic)) {
                    for (int i = 0; i < args.length; i++) {
                        if (args[i] instanceof JavaBeanDescriptor) {
                            args[i] = JavaBeanSerializeUtil.deserialize((JavaBeanDescriptor) args[i]);
                        } else {
                            throw new RpcException(
                                    "Generic serialization [" +
                                            GENERIC_SERIALIZATION_BEAN +
                                            "] only support message type " +
                                            JavaBeanDescriptor.class.getName() +
                                            " and your message type is " +
                                            args[i].getClass().getName());
                        }
                    }
                } else if (ProtocolUtils.isProtobufGenericSerialization(generic)) {
                    // as proto3 only accept one protobuf parameter
                    if (args.length == 1 && args[0] instanceof String) {
                        try (UnsafeByteArrayInputStream is =
                                     new UnsafeByteArrayInputStream(((String) args[0]).getBytes())) {
                            args[0] = ExtensionLoader.getExtensionLoader(Serialization.class)
                                    .getExtension(GENERIC_SERIALIZATION_PROTOBUF)
                                    .deserialize(null, is).readObject(method.getParameterTypes()[0]);
                        } catch (Exception e) {
                            throw new RpcException("Deserialize argument failed.", e);
                        }
                    } else {
                        throw new RpcException(
                                "Generic serialization [" +
                                        GENERIC_SERIALIZATION_PROTOBUF +
                                        "] only support one " + String.class.getName() +
                                        " argument and your message size is " +
                                        args.length + " and type is" +
                                        args[0].getClass().getName());
                    }
                }

                RpcInvocation rpcInvocation = new RpcInvocation(method, invoker.getInterface().getName(), invoker.getUrl().getProtocolServiceKey(), args, inv.getObjectAttachments(), inv.getAttributes());
                rpcInvocation.setInvoker(inv.getInvoker());
                rpcInvocation.setTargetServiceUniqueName(inv.getTargetServiceUniqueName());

                return invoker.invoke(rpcInvocation);
            } catch (NoSuchMethodException | ClassNotFoundException e) {
                throw new RpcException(e.getMessage(), e);
            }
        }
        return invoker.invoke(inv);
    }

}