Metacat

        SystemMetadata sm = getSystemMetadata(token, guid);

        Checksum cs = sm.getChecksum();

        if(cs.getAlgorithm().toString().equals(checksumAlgorithm))

            return cs;

        else

            if(checksumAlgorithm == null)

            {

                checksumAlgorithm = "MD5";

            }

            InputStream docStream = get(token, guid);

            String checksum;

            try

            {

                checksum = checksum(docStream, checksumAlgorithm);

            }

            catch(Exception e)

            {

                throw new ServiceFailure("1410", "Error getting checksum: " + e.getMessage());

            }

            Checksum c = new Checksum();

            c.setAlgorithm(ChecksumAlgorithm.convert(checksumAlgorithm));

            c.setValue(checksum);

            return c;