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class CompressionTransformerSpi extends CacheObjectTransformerSpiAdapter {
	protected ByteBuffer transform(ByteBuffer original) throws IgniteCheckedException {
                     
		int limlocOverhead = original.remaining() - 4; // Original length.
        int totalOverhead = CacheObjectTransformerSpi.OVERHEAD + locOverhead;

        int origSize = original.remaining();
        int lim = origSize - totalOverhead;          

		if (lim <= 0)
            throw new IgniteCheckedException("Compression is not profitable.");

        ByteBuffer compressed = byteBuffer(lim);

		int origSize = original.remaining();

		compressed.position(locOverhead);

		Zstd.compress(compressed, original, 1);

        compressed.flip(); 

		compressed.putInt(origSize);

		compressed.rewind();          

        return compressed;
    }

    protected ByteBuffer restore(ByteBuffer transformed) {
        ByteBuffer restored = byteBuffer(transformed.getInt());

        Zstd.decompress(restored, transformed);

        restored.flip();
              
        return restored;
    }
}