# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import io
import pickle

import numpy as np

import paddle


def convert_object_to_tensor(obj):
    _pickler = pickle.Pickler
    f = io.BytesIO()
    _pickler(f).dump(obj)
    data = np.frombuffer(f.getvalue(), dtype=np.uint8)
    tensor = paddle.to_tensor(data)
    return tensor, tensor.numel()


def convert_tensor_to_object(tensor, len_of_tensor):
    _unpickler = pickle.Unpickler
    return _unpickler(io.BytesIO(tensor.numpy()[:len_of_tensor])).load()