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# Copyright (c) OpenMMLab. All rights reserved.
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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