presto-rcfile/src/main/java/io/prestosql/rcfile/AircompressorCodecFactory.java/AircompressorCodecFactory/createDecompressor
class AircompressorCodecFactory:    @Override
    public RcFileDecompressor createDecompressor(String codecName)
    {
        if (SNAPPY_CODEC_NAME.equals(codecName)) {
            return new AircompressorDecompressor(new SnappyCodec());
        }
        if (LZO_CODEC_NAME.equals(codecName) || LZO_CODEC_NAME_DEPRECATED.equals(codecName)) {
            return new AircompressorDecompressor(new LzoCodec());
        }
        if (LZ4_CODEC_NAME.equals(codecName) || LZ4_HC_CODEC_NAME.equals(codecName)) {
            return new AircompressorDecompressor(new Lz4Codec());
        }
        if (GZIP_CODEC_NAME.equals(codecName)) {
            return new AircompressorDecompressor(new JdkGzipCodec());
        }
        return delegate.createDecompressor(codecName);
    }