public String getName() {
      return compressName;
    }
Get an object that holds settings used by ByteBuffDecompressor. It's expensive to pull these
from a Configuration object every time we decompress a block, so pull them here when, for
example, opening an HFile, and reuse the returned HFileDecompressionContext as much as
possible. The concrete class of this object will be one that is specific to the codec
implementation in use. You don't need to inspect it yourself, just pass it along to
{@link ByteBuffDecompressor#reinit(HFileDecompressionContext)}.
hbase-common/src/main/java/org/apache/hadoop/hbase/io/compress/Compression.java