question: private static byte [ ] unwrapCalculatedValue ( byte [ ] data ) { if ( data . length < CALC_DATA_OFFSET ) { return data ; } ByteBuffer buffer = PageChannel . wrap ( data ) ; buffer . position ( CALC_DATA_LEN_OFFSET ) ; int dataLen = buffer . getInt ( ) ; byte [ ] newData = new byte [ Math . min ( buffer . remaining ( ) , dataLen ) ] ; buffer . get ( newData ) ; return newData ; }
target:  Grabs the real data bytes from a calculated value.