org.apache.parquet.hadoop.codec.Lz4RawDecompressor Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.parquet.hadoop.codec;
import io.airlift.compress.lz4.Lz4Decompressor;
import java.io.IOException;
import java.nio.ByteBuffer;
public class Lz4RawDecompressor extends NonBlockedDecompressor {
private Lz4Decompressor decompressor = new Lz4Decompressor();
@Override
protected int maxUncompressedLength(ByteBuffer compressed, int maxUncompressedLength) throws IOException {
// We cannot obtain the precise uncompressed length from the input data.
// Simply return the maxUncompressedLength.
return maxUncompressedLength;
}
@Override
protected int uncompress(ByteBuffer compressed, ByteBuffer uncompressed) throws IOException {
decompressor.decompress(compressed, uncompressed);
int uncompressedSize = uncompressed.position();
uncompressed.limit(uncompressedSize);
uncompressed.rewind();
return uncompressedSize;
}
}