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# 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
#
# 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 __future__ import annotations
import zlib
from pyiceberg.avro.codecs.codec import Codec
class DeflateCodec(Codec):
@staticmethod
def compress(data: bytes) -> tuple[bytes, int]:
# The first two characters and last character are zlib
# wrappers around deflate data.
compressed_data = zlib.compress(data)[2:-1]
return compressed_data, len(compressed_data)
@staticmethod
def decompress(data: bytes) -> bytes:
# -15 is the log of the window size; negative indicates
# "raw" (no zlib headers) decompression. See zlib.h.
return zlib.decompress(data, -15)
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