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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 io import BytesIO
from typing import IO, Any
import numpy as np
from cosmos_predict1.utils.easy_io.handlers.base import BaseFileHandler
class NumpyHandler(BaseFileHandler):
str_like = False
def load_from_fileobj(self, file: IO[bytes], **kwargs) -> Any:
"""
Load a NumPy array from a file-like object.
Parameters:
file (IO[bytes]): The file-like object containing the NumPy array data.
**kwargs: Additional keyword arguments passed to `np.load`.
Returns:
numpy.ndarray: The loaded NumPy array.
"""
return np.load(file, **kwargs)
def load_from_path(self, filepath: str, **kwargs) -> Any:
"""
Load a NumPy array from a file path.
Parameters:
filepath (str): The path to the file to load.
**kwargs: Additional keyword arguments passed to `np.load`.
Returns:
numpy.ndarray: The loaded NumPy array.
"""
return super().load_from_path(filepath, mode="rb", **kwargs)
def dump_to_str(self, obj: np.ndarray, **kwargs) -> str:
"""
Serialize a NumPy array to a string in binary format.
Parameters:
obj (np.ndarray): The NumPy array to serialize.
**kwargs: Additional keyword arguments passed to `np.save`.
Returns:
str: The serialized NumPy array as a string.
"""
with BytesIO() as f:
np.save(f, obj, **kwargs)
return f.getvalue()
def dump_to_fileobj(self, obj: np.ndarray, file: IO[bytes], **kwargs):
"""
Dump a NumPy array to a file-like object.
Parameters:
obj (np.ndarray): The NumPy array to dump.
file (IO[bytes]): The file-like object to which the array is dumped.
**kwargs: Additional keyword arguments passed to `np.save`.
"""
np.save(file, obj, **kwargs)
def dump_to_path(self, obj: np.ndarray, filepath: str, **kwargs):
"""
Dump a NumPy array to a file path.
Parameters:
obj (np.ndarray): The NumPy array to dump.
filepath (str): The file path where the array should be saved.
**kwargs: Additional keyword arguments passed to `np.save`.
"""
with open(filepath, "wb") as f:
np.save(f, obj, **kwargs)
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