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compression.rs
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compression.rs
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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.
use std::io::{Read, Write};
use crate::error::{ArrowError, Result};
use crate::ipc::CompressionType;
#[derive(Clone, Copy, PartialEq)]
pub enum CompressionCodecType {
NoCompression,
Lz4Frame,
ZSTD,
}
impl From<CompressionType> for CompressionCodecType {
fn from(compression_type: CompressionType) -> Self {
match compression_type {
CompressionType::ZSTD => CompressionCodecType::ZSTD,
CompressionType::LZ4_FRAME => CompressionCodecType::Lz4Frame,
_ => CompressionCodecType::NoCompression
}
}
}
impl Into<CompressionType> for CompressionCodecType {
fn into(self) -> CompressionType {
match self {
CompressionCodecType::NoCompression => CompressionType(-1),
CompressionCodecType::Lz4Frame => CompressionType::LZ4_FRAME,
CompressionCodecType::ZSTD => CompressionType::ZSTD
}
}
}
impl CompressionCodecType {
pub fn compress(&self, input: &[u8], output: &mut Vec<u8>) -> Result<()> {
match self {
CompressionCodecType::Lz4Frame => {
let mut encoder = lz4::EncoderBuilder::new().build(output).unwrap();
encoder.write_all(input).unwrap();
Ok(())
}
CompressionCodecType::ZSTD => {
Err(ArrowError::NotYetImplemented("Compression don't support the ZSTD".to_string()))
}
_ => {
Ok(())
}
}
}
pub fn decompress(&self, input: &[u8], output: &mut Vec<u8>) -> Result<usize> {
let result = match self {
CompressionCodecType::Lz4Frame => {
let mut decoder = lz4::Decoder::new(input)?;
decoder.read_to_end(output)
}
CompressionCodecType::ZSTD => {
let mut decoder = zstd::Decoder::new(input)?;
decoder.read_to_end(output)
}
_ => {
Ok(input.len())
}
};
result.map_err(|e| {
ArrowError::from(e)
})
}
}