dubbo/compression/identities.py

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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
#
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# distributed under the License is distributed on an "AS IS" BASIS,
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from dubbo.common import SingletonBase
from dubbo.compression import Compressor, Decompressor

__all__ = ["Identity"]


class Identity(Compressor, Decompressor, SingletonBase):
    """
    The identity compression and decompressor.It does not compress or decompress the data.
    """

    _MESSAGE_ENCODING = "identity"

    @classmethod
    def get_message_encoding(cls) -> str:
        """
        Get message encoding of current compression
        :return: The message encoding.
        :rtype: str
        """
        return cls._MESSAGE_ENCODING

    def compress(self, data: bytes) -> bytes:
        """
        Compress the data.
        :param data: The data to compress.
        :type data: bytes
        :return: The compressed data.
        :rtype: bytes
        """
        return data

    def decompress(self, data: bytes) -> bytes:
        """
        Decompress the data.
        :param data: The data to decompress.
        :type data: bytes
        :return: The decompressed data.
        :rtype: bytes
        """
        return data