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# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# 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.
from abc import ABCMeta, abstractmethod
class BaseFileHandler(metaclass=ABCMeta):
# `str_like` is a flag to indicate whether the type of file object is
# str-like object or bytes-like object. Pickle only processes bytes-like
# objects but json only processes str-like object. If it is str-like
# object, `StringIO` will be used to process the buffer.
str_like = True
@abstractmethod
def load_from_fileobj(self, file, **kwargs):
pass
@abstractmethod
def dump_to_fileobj(self, obj, file, **kwargs):
pass
@abstractmethod
def dump_to_str(self, obj, **kwargs):
pass
def load_from_path(self, filepath, mode="r", **kwargs):
with open(filepath, mode) as f:
return self.load_from_fileobj(f, **kwargs)
def dump_to_path(self, obj, filepath, mode="w", **kwargs):
with open(filepath, mode) as f:
self.dump_to_fileobj(obj, f, **kwargs)
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